AUDISON VRx 4.300EX User Manual

Owner’s manual

Power amplification integrated system for cars

2000

EDITION

62018 Potenza Picena (MC) Italy • Tel. ++39.0733.870870 • Fax ++39.0733.870880 • http://www.audison.com • e-mail: com@audison.com

is a division of

AUDISON’S MEASUREMENT STANDARDS

Power measures taken according to audison standard 1998 edition.

- 12 VDC and 13.8 VDC.

- 1 kHz or crossover cut-off frequency.

- 0.3 % THD nominal power; 1% THD continuous power.

- Tolerance: +10 %; -5 %.

- Continuous power given by RMS Voltage measured on resistive load.

- The nominal power of the amplifier is measured upon a battery voltage of 12 Volts with a 4 Ohm load

and with all channels in function.

- 69 -

12 12 24 HI-PASS 12/LO-PASS 24

✓✓✓✓

HI-PASS; LO-PASS; BYPASS HI-PASS; BYPASS LO-PASS; BYPASS HI-PASS; LO-PASS; BYPASS BYPASS

CROSSOVER SLOPE

CONTINUOUS ADJUSTMENTS

PRE-OUT FUNCTION

TERMINALS FOR PROTECTING CONNECTIONS; IT IS POSSIBLE TO INVERT THEIR FRONT PANEL IN ORDER TO FIX THEM WITH HIDDEN SCREWS.

RACCORDS BETWEEN TWO AMPLIFIERS FOR PROTECTING CONNECTIONS; PROVIDED WITH A 24K GOLD PLATED BRASS PLATE WHICH CAN BE PERSONALISED.

ANALOGUE PHASE CONTROL. CONTINUOUSLY ADJUSTABLE PHASE BETWEEN 0˚ AND 360˚, SELECTION ON THREE FREQUENCY RANGES (40-200 HZ; 200-800 HZ; 8004500 HZ). BY-PASS SWITCH.

ONE BAND PARAMETRIC EQUALISER WITH CONTINUOUS CONTROLS FOR: FREQUENCY (SELECTABLE IN THREE STEPS, FROM 20HZ TO 20KHZ), GAIN (-9DB, +9DB), BAND WIDTH (Q FROM 1 TO 4). BY-PASS SWITCH.

ADDITIONAL MODULE FOR CONTROLLING SEVERAL CHANNELS. IF IT IS MOUNTED IN A FURTHER BTX2, IT CONTROLS ALSO REAR CHANNEL WITH ONLY ONE VCRDK.

GRADUAL INTERVENTION COOLING SYSTEM CONTROLLED BY THE AMPLIFIER TEMPERATURE. MIN. STARTING THRESHOLD TEMPERATURE: 44˚C; MAX. EFFICIENCY TEMPERATURE: 74˚C. IT CONSISTS OF TFC CONTROLLER MODULE TO MOUNT INSIDE THE AMPLIFIER AND TWO FANS GROUPS, TO PLACE INTO A TERMINAL OR A RACCORD.

TRM4 TRM6 RC08 RC10 RC12

MULTICHANNEL

EXTENSIONS

HI/LO-PASS BAND/HI-PASS LO-PASS MONO

BALANCED PRE OUT

HL12 BH12

LM24

HL24 BSA1

PRM3 SM24 PC36 DSC1 VCRDK VCA1D BTX2 MAC2

CONTROL EXTENSIONS

AMPLIFIERS

VRx 1.500

VRx 2.150 VRx 2.250 VRx 2.400 VRx 4.300 VRx 6.420

POWER @ 13,8V

HOUSING DUCTS FOR MAC2 FANS.

24DB/OCT. MONO SUBSONIC FILTER. CONTINUOUSLY ADJUSTABLE FREQUENCY BETWEEN 14 AND 36HZ. BY-PASS SWITCH.

DEPENDENT ADJUSTMENTS INDEPENDENT ADJUSTMENTS

AMP-OUT/PRE-OUT SWITCHING

✓✓✓✓

CUT OFF FREQUENCIES 40-5k

BAND-PASS LO 40-2k

BAND-PASS HI 150-5k

HI-PASS 150-5k

40-90

LO-PASS 40-90

HI-PASS 40-120

500x1

75x4+85x2

560x1 1080x1 2000x1

0.02 100

8-4-2-1

✓

75x2

110x2 180x2 240x2 360x1 480x1

0.02 100

✓

8-4-2-1

8-4-2

✓

125x2

160x2 280x2 420x2 560x1 840x1

0.02 100

✓

8-4-2-1

8-4-2

✓

200x2

250x2 450x2 580x2 900x1

1160x1

0.02 100

✓

8-4-2-1

8-4-2

✓

65x4+80x2

120x4+150x2 75x4 (4Ω)+165x2 (2Ω) 75x4 (4Ω)+250x2 (1Ω)

75x4+330x1

75x4 (4Ω)+500x1 (2Ω)

110x4+430x1

0.02 100

✓

Ch.A & Ch.B: 8-4-2; Ch.C: 8-4-2-1

Ch.A & Ch.B: 8-4; Ch.C: 8-4-2

✓✓✓

75x4

110x4 175x4 220x4

102x2+380x1

90x2 (4Ω)+530x1 (2Ω)

350x2 440x2

0.02 100

✓

Ch.A & Ch.B: 8-4-2-1

Ch.A & Ch.B: 8-4-2

✓✓

Nominal Power @ 12V

6 ch. mode - 4Ω

1222 4 6

Number of channels

Distortion - THD (1 KHz) A weighed S/N ratio

0.15-1.5/0.5-5 0.15-1.5/0.5-5 0.15-1.5/0.5-5 0.15-1.5/0.5-5 0.15-1.5/0.5-50.15-1.5/0.5-5

Hi-Lo input sensitivity Use in bridge

✓✓✓ ✓✓

Use in tri-mode Stereo load impedance Mono/bridge load impedance PRM3 option

✓✓✓✓ ✓✓

SM24 option

✓✓✓✓ ✓✓

PC36 option

✓

DSC1 option

✓✓✓✓ ✓✓

BTX2 option

✓✓✓✓ ✓✓

VCRDK option

✓✓✓✓

HL12 option

✓✓✓

BH12 option

✓✓✓✓

LM24 option

✓✓✓✓

HL24 option

✓✓✓✓

BSA1 option

✓✓✓✓ ✓✓

MAC2 option - with TRM or RC

✓✓✓✓ ✓✓

RC08 - RC10 - RC12 option

NP - Nominal Power (+10%, -5%) @ 4Ω - 12V - 0,3% THD.

AUTOMATIC DYNAMIC PROCESSOR FOR SUBWOOFER RESPONSE CONTROL. SYSTEM FOR MASTER VOLUME REMOTE CONTROL IF USED IN BTX2 OR FOR LEVEL CONTROL OF ANY WAYS IN A MULTIAMPLIFIED SYSTEM IF USED IN VRX. BASED ON

VCA1D WITH DIGITAL CONTROL.

ABS BALANCED LINE TRANSMITTER. THREE STEP GAIN CONTROL (0DB, +3DB, +6DB) AND PEAK LED. OPTIONAL VCA MODULE FOR LEVEL CONTROL. YOU CAN REALISE MASTER VOLUME IN FRONT/REAR SYSTEMS USING TWO BTX2, ONE VCRDK AND ONE VCA1D.

Ω Ω

dBA

VRMS

6 ch. mode - 2Ω 6 ch. mode - 4/2Ω 6 ch. mode - 4/1Ω 5 ch. mode - 4Ω 5 ch. mode - 4/2Ω 5 ch. mode - 2Ω 4 ch. mode - 4Ω 4 ch. mode - 2Ω 4 ch. mode - 1Ω 3 ch. mode - 4Ω 3 ch. mode - 4/2Ω 2 ch. mode - 4Ω 2 ch. mode - 2Ω 2 ch. mode - 1Ω 1 ch. mode - 4Ω 1 ch. mode - 2Ω 1 ch. mode - 1Ω

W W W W W W W W W W W W W W W W W

dB/oct.

HI-PASS STEREO LO-PASS MONO

COOLING DUCT EXTENSIONS

✓✓✓✓ ✓✓

TRM4 - TRM6 option

- 1 -

- Objectives of VRx project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 2

- General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 3

- VRx - MODULAR EXTENSIONS: CONTROL EXTENSIONS

- PRM3 stereo parametric equaliser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 6

- SM24 24 dB/oct. mono subsonic filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 6

- PC36 360° phase controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 7

- DSC1 sub dynamic control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 8

- VCRDK digital remote volume control kit (VCRD + VCA1D) . . . . . . . . . . . . . . . . . . . . p. 8

- MAC2 forced air modulated cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 9

- Insertion of fans group into Terminals and Raccords . . . . . . . . . . . . . . . . . . . . . . . . . p. 10

- BTX2 stereo balancer/preamplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 11

- VRx - MODULAR EXTENSIONS: MULTICHANNEL EXTENSIONS

- HL12 12 dB/oct. HI/LO-PASS crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 14

- BH12 12 dB/oct. BAND/HI-PASS crossover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 15

- LM24 24 dB/oct. LO-PASS mono crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 16

- HL24 12 dB/oct HI-PASS - 24 dB/oct. LO-PASS crossover . . . . . . . . . . . . . . . . . . . . . p. 17

- BSA1 Stereo balanced pre-out repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 18

- Updating of short guide under wooden strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 19

- VRx - MODULAR EXTENSIONS: COOLING DUCT EXTENSIONS

- Terminals and Raccords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 22

- Terminals: Installation of TRM4 - TRM6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 23

- Raccords: Installation of RC08 - RC10 - RC12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 24

- Wooden strip removal - Logo rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 25

- VRX INSTALLATION

- General recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 28

- Cables size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 29

- External fuse size and location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 30

- Internal fuse replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 31

- VRx size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 32

- VRx - 1.500

- Technical features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 34

- Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 35

- Controls and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 36

- Short guide under wooden strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 37

- Where to put modular extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 38

- VRx 1.500 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 39

- VRx - 2.150 - 2.250 - 2.400

- Technical features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 42 - 44

- Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 45

- Controls and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 46

- Short guide under wooden strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 47

- Where to put modular extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 48 - 49

- VRx 2.150 - 2.250 - 2.400 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 50

- VRx - 4.300

- Technical features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 52

- Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 53

- Controls and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 54

- Short guide under wooden strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 55

- 12dB/oct. Sub filter slope configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 56

- 24dB/oct. Mono Sub filter slope configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 57

- Where to put modular extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 58

- VRx 4.300 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 59

- VRx - 6.420

- Technical features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 62

- Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 63

- Controls and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 64

- Short guide under wooden strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 65

- Configurations: front/rear, multichannel, A-B-C amplifiers in bridge . . . . . . . . . . . . . p. 66

- Where to put modular extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 67

- VRx 6.420 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 68

- Audison’s measurement standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 69

VRx6.420 connections

Inputs and outputs: connection with C

amplifiers in bridge

Power supply, remote and accessories Inputs and outputs:

stereo connection

Inputs and outputs: connection with A, B

and C amplifiers in bridge

- 68 -

Please see “Technical Features” and “External fuse size and location” in order to choose the proper external fuse.

OBJECTIVES OF VRx PROJECT

VRx project was conceived in order to solve the problems which derive from the installation of a high quality car audio system. The long and constant work made with professional installers and the use of the most advanced, currently available technology allowed audison’s designers to attain totally new results in terms of power, reliability and exceptional versatility above all. “VRx SYSTEM” derived from this: it is a complete line of integrated electronic circuits made by amplifiers, active crossovers and signal processors, characterised by a common conceptual system called Open Deck Construction.

Open Deck Construction

It’s the heart of VRx SYSTEM. It indicates the “totally open construction” of VRx SYSTEM. A sophisticated pre section can accept several modules (MODULAR EXTENSIONS) which are put before the amplifiers and allow their functioning configuration. The integration between amplifier and signal processors permits to reduce signal paths as much as possible and to obtain performances which are not commonly attained through separate units.

Modular Extensions

They are divided into:

• CONTROL EXTENSIONS: signal processing and control modules and cooling modules. They can be used into all VRx.

• MULTICHANNEL EXTENSIONS: crossover modules which can be employed in one and two channel amplifiers (VRx1 and VRx2). Multichannel VRx (VRx4 and VRx6) are already supplied with a sophisticated, reconfigurable crossover.

• COOLING DUCT EXTENSIONS: terminals and raccords which allow air ducting inside and outside the heat sink, directing its flux in order to improve cooling. If cooling modules are not used, Cooling Duct Extensions can be employed for esthetical purposes.

ABS ®- AUDISON BALANCED SYSTEM

All VRx amplifiers have balanced inputs and, if supplied with integrated crossover or Multichannel Extensions, they also have balanced outputs. They use audison cable ABS connectors, which allow balanced connection through an exclusive panel connector which is as big as standard RCA ones. They can accept signals up to 5V, in order to be as compatible as possible with all sources which can be found into the market.

VRx AMPLIFIER

While developing VRx project, utmost attention was paid to the following aspects:

• dynamics, which involves power supply and amplifying stage

• reliability and, thus, protection and cooling

• sound quality.

VRx amplifiers have high power, which can guarantee very good dynamics even in car. In order to be able to do this, power supply is oversized and has the same structure as HV series one.

Power supply is protected from overloads and excessive voltages (due to the car voltage controller breakdown or to the battery charger fault, for instance). Protection against short circuits or against too low loads onto speakers outputs were also introduced, as well as in case there is direct current on power signal. Thermal protection is double: it traditionally controls heat sink temperature but also power supply transformers one.

In order to achieve the best sound quality, VRx use totally symmetrical, pure A class refined drivers made with discrete components. These are mounted onto separate printed circuit boards with heat sink; this solution guarantees optimal thermal stability. Final stages use complementary inverted triplets of bipolar transistors. These components were judged better than mosfets since they permit to obtain more linearity with the same power.

The accurate calibration of all these designing elements allowed the limitation of feedback factor below 15dB and, thus, the achievement of outstanding sound features.

- 2 - - 67 -

TPC VRx6 power supply controller. It must not be removed.

TFC

(supplied with MAC2)

CONTROL

EXTENSIONS

PRM3 for A channels

CONTROL

EXTENSIONS

DMRX socket for a

future extension. Do not put any modules into it.

Socket for:

- VCA1D, given with VCRDK

CONTROL

EXTENSIONS

VCA

PRM3 for B channels

PRM3 for C channels

SM24

CONTROL

EXTENSIONS

PC36

CONTROL

EXTENSIONS

LD1 VRx6 driver stages.

They must not be removed.

Canali A

Canali B

Canali C

VRx6.420

Controls under

wooden strip

BYP08 bridge: 4+4 Pins

Modular Extensions

Serial modules

BYP12 bridge: 6+6 Pins

VRX6CD-S VRx6 controls. They must not be removed.

WHERE TO PUT MODULAR EXTENSIONS

GENERAL FEATURES

Conformity with “E” norms

VRx models have a RF filter which makes them suitable to the new norms about radio-frequency disturbances emission inside cars before any others. A “common mode”, adequately dimensioned filter choke was inserted next to power supply input in order to prevent sudden voltage drops which commonly occur in similar circuit typologies.

Thermal limiter onto transformers

A very effective protection circuit was put onto transformers to prevent them from exceeding temperatures which might be dangerous for the amplifier integrity. This circuit intervenes by having VRx stop; the amplifier will start to function again only after the necessary cooling and reset operation (on and off again) will have to be carried out.

LNS (Line Noise Suppressor) circuit

LNS circuit allows the system low frequency disturbances rejection, reducing the ordinary noise due to car electrical parts (alternator, electronic injection, etc.). It does not affect sound and is effective in most cases. The special switch which is onto all models except VRx 6.420 (where it is not indicated since it is constantly active) permits to check if its intervention is necessary in case there are several VRx configured in cascade.

TPC.2 (Twin Power Controller) power supply stage handling system

TPC.2 allows to increase power supply stage handling speed (10 times approx.). This implies higher available impulsive power and lower stress of filter capacitors.

OCN (Off Current Null) and DVP (Damaging Voltage Protection) circuits

Thanks to OCN circuit, VRx models are the only ones to be in conformity with max absorption new standards when amplifier is off. Their value (0.00005A) makes them be 10 times below the maximum allowed limit. DVP circuit protects VRx amplifiers from voltage increases and electrostatic discharges.

Synchro-PWM power supply

Power supply stage consists of two totally separate and synchronised sections: one for positive and one for negative voltages. It is therefore possible to satisfy the final stage current demands more promptly, guaranteeing higher energy and speed with low frequencies.

Final stage driver modules: LD1.2 and DHF.1

Final stage driver modules (LD1.2 for VRx2-4-6; DHF.1 for VRx1) sum up all audison’s experience of amplified sound characterisation. Subjected to continuous studies and improvements, they further increase linearity and acoustic impact with low frequencies in the current VRx version.

DFL (Distortion Frequency Limiter) circuit

DFL circuit is a real electronic protection for speakers. It limits max distortion factor to 6% onto low frequencies and to 2% onto high ones. This implies constant and systematic control onto all audio range and wide safety margin for all speakers in the system.

Sub input (VRx6.420)

VRx6.420 PRE OUT output can be used as IN Sub input in order to use this model with the head units which have a third preamplified output for the subwoofer, exploiting the amplifier internal filter.

RGP input stages protection

(Resettable Ground Protection)

RGP is an electronic protection able to detect high direct current passage onto input ground; it acts by putting the device in “stand by” condition (safety). The main feature of this circuit is its being able to work even when the amplifier is off, allowing the interruption of current passage towards input stages in case of power supply transformers short circuit. It perfectly guarantees the system safety since it consists of several sensors.

Three way, big size terminal block

VRx terminal block can accept cables up to 2 gauge section. A third positive pole houses the external capacitor (+C) which, thus, directly acts onto power supply voltage seen by the amplifier. This minimises voltage drop and cable overheating. Fastening screws are protected by a polycarbonate door. Inside the terminal block there is also a location for a strip fuse which can be inspected through the device bottom, that protects electronic circuitry and external capacitor. This solution allows the installation to be cleaner and the terminal block-fuse holder system to have 300A approx. max capacity.

- 3 -- 66 -

Front/Rear configurations

Multichannel Configurations

A, B and C bridged amplifiers configurations

= Released switch.

= Pushed switch.

IN2 = Sub level: Sub is driven by IN1 + IN2. Fader is used to adjust sub level. IN2 = Not used: Sub and Front driven by IN1.

Channels are driven by PC36 (PC36 always takes signal from IN1) Sub is driven by IN1 + IN2 NO FADING SUB (with active Constant Bass)

Note:

Channels are driven by PC36 (PC36 always takes signal from IN1). Sub is driven by IN1 + IN2.

Note:

MA, MB and MC on position 2 (mono)

VRx6.420

=Switch involved

in configurations.

- 65 -

Short guide under wooden strip

It shows internal crossover, outputs configurations and controls meaning

VRx6.420

- PRM3 stereo parametric equaliser

- SM24 24dB/oct. mono subsonic filter

- PC36 360˚ phase controller

- DSC1 sub dynamic control

- VCRDK digital remote volume control kit (VCA1D module + VCRD adjuster)

- VCA1D VCA1D module VRx - BTX2

- MAC2 forced air modulated cooling system (2 fans with spacers to put into Terminals and Raccords, plus TFC control module)

- BTX2 stereo balancer/preamplifier

- 5 -

VRx MODULAR EXTENSIONS:

CONTROL EXTENSIONS

WARNING!

Apply to Audison’s specialised installation centres for the installation and

configuration of modular extensions described in this section

2000

EDITION

K1 - Bal/Unbal inputs

switch.

K2 -It selects sensitivity

range of all inputs.

K3 - In Sub/Pre Out

switch. ABS sockets, normally used for Pre output, can be also employed as additional input for Sub.

K4 - Bal/Unbal switch for

PRE output. It is

possible to have a balanced output signal even with an unbalanced input one. Put K4 on B (Balanced) only if K3 is on O (Out)

M1, M2, ..., M6 - Switches

to select the amplifier functioning modes. M1, M2 and M3 act on crossover and on inputs connection; M4, M5 and M6 act on outputs. Please see the manual in order to use them; it indicates VRx6 main functioning modes.

F1- Mono LO-PASS filter

for sub, 24dB/oct. slope.

F2, F3, F4, F5, F6 - 12dB/oct. stereo crossover

filters. The pairs (F4, F5) and (F3, F6) form two band-passes.

LA,LB, LC - Input sensitivity adjustment of A and

B amplifiers pairs respectively.

MA, MB, MC - Mono/Stereo switches of A, B and

C amplifiers respectively.

VRx6.420

Controls description

ON - Green led

It indicates the amplifier is on.

SAFETY - Red led

It indicates protection intervention: excessively high temperature or output anomalies (direct current, short circuit or dangerously low load impedance). Protection intervention stops the amplifier functioning. Switch the amplifier off; when anomaly is eliminated, switch the amplifier on again.

PEAK CHANNELS LA - LB - RA RB - Orange leds

They light up when one or more VRx amplifiers are about to attain distortion threshold. They are useful to adjust inputs sensitivity.

- 64 -

Short guide

Leds

Controls under

wooden strip

Short guide

A Channels

B Channels

C Channels

Controls and functions

- 6 - - 63 -

Block diagram

VRx6.420

Optional modules

Controls panel

Functions diagram

WF - Frequency adjustment. WB - SM24 ACTIVE (ON)/BYPASS (OFF) switch.

Controls description

VRx1 and VRx2 amplifiers can use one PRM3 module; VRx4 amplifiers can use two; VRx6 amplifiers can use three. This allows the insertion of a parametric equalisation on each way of a multiamplified system made with VRx amplifiers.

Warning: There is a DIP Switch to be set on ON into PRM3.1 modules.

DIP Switch

VRx Control Extensions PRM3

Stereo parametric

equaliser

Gain: ± 9 dB

Frequencies ranges: 20Hz÷200Hz; 200Hz÷2KHz; 2 kHz÷20KHz

Controls panel

Functions diagram

Q adjustment: 1÷4

Controls description

SM24 is monophonic since it was designed in order to be used with subwoofer. It only acts on the Right channel of preamplified signal, therefore:

• the amplifier it drives must be configured in mono;

• if its output is sent to an external amplifier (possible solution with VRx4 and VRx6), only the

Right Channel of pre output must be used.

VRx Control Extensions SM24

Mono subsonic filter

Frequency range: 14 Hz ÷ 36 Hz

24dB/oct. HI-PASS

Short guide

One band stereo parametric equaliser with frequency, gain and bandwidth (Q) control.

Monophonic subsonic filter for subwoofer.

JF - Frequency adjustment. JM - Switch for activating frequency ranges multiplier. JB - Active (ON)/BYPASS (OFF) switch. JX - Frequency ranges switch. JL - Level adjustment. JQ - Q adjustment.

PC36 frequency range must be set according to the cut-off frequency chosen for HI-PASS filter it must be used with.

PC36 module is able to vary relative phase between two ways of a multiamplified system. Its purpose is to make the emission of a speakers system, located in different places in car, more

homogeneous. Generally speaking, PC36 module allows you to put the HI-PASS filtered way with electronic crossover in phase with regards to the one which is LO-PASS filtered in a bi-amplified system. It is possible to use two PC36 in a three way amplified system: one to align tweeters with regards to midwoofers and one to align midwoofers with regards to subwoofer. Used into VRx4 and VRx6, PC36 allows the front system phase alignment with regards to subwoofer. Applied into VRx2 and VRx1, it permits to put all crosses of a multiamplified system in phase if it is used together with HI-PASS sections of HL12, HL24, BH12 modules or with BAND-PASS sections of BH12.

Pre-select frequencies ranges through jumpers according to cut-off frequencies of the HI-PASS filter it is used with. PC36 is originally set on 40 ÷ 200 Hz.

- 7 -

VRx Control Extensions PC36

Frequencies ranges: 40Hz÷200Hz; 200Hz÷800Hz; 800Hz÷4,5kHz

Phase range: 0°÷360°

360˚ phase controller

Controls panel

Functions diagram

YH - Phase adjustment. YB - Switch: PC36 ACTIVE (ON)/BYPASS (OFF).

Controls description

Short guide

Freq. range 40Hz÷200Hz

Freq. range 200Hz÷800Hz

Freq. range 800Hz÷4.5kHz

Analogue phase controller acting on the higher frequencies of a multiamplified audio chain.

WARNING

The use of PC36 into VRx1 and VRx2 depends

on the installation of HL12, BH12, HL24

multichannel extensions, since PC36 acts only

on HI-PASS section.

Where PC36 acts:

VRx6.420

Technical features

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ÷ 15 VDC

IDLING CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.6 A

IDLING CURRENT WHEN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.04 mA

CONTINUOUS NOMINAL POWER Tol.: (+10%/-5%); 0.3% THD; 12 VDC

A,B,C stereo ch. on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2x65W + 2x65W + 2x80 (RMS)

CONTINUOUS POWER 6 CHANNELS Tol.: (+10%/-5%); 1% THD; 12.6 VDC

A,B,C stereo ch. on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2x75W + 2x75W + 2x85 (RMS)

CONTINUOUS POWER 6 CHANNELS Tol.: (+10%/-5%); 1% THD; 13.8 VDC

1) A,B,C stereo ch. on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . .2x75W + 2x75W + 2x85 (RMS)

2) A,B,C stereo ch. on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . .2x120W + 2x120W + 2x150 (RMS)

3) A,B stereo ch. on 4 Ohms, C stereo ch. on 2 Ohms . . . . . . . . . . .2x75W + 2x75W + 2x165 (RMS)

4) A,B stereo ch. on 4 Ohms, C stereo ch. on 1 Ohm . . . . . . . . . . . .2x75W + 2x75W + 2x250 (RMS)

CONTINUOUS POWER 5 CHANNELS Tol.: (+10%/-5%); 1% THD; 13.8 VDC

5) A,B stereo ch. on 4 Ohms, C bridged ch. on 4 Ohms . . . . . . . . . .2x75W + 2x75W + 1x330 (RMS)

6) A,B, stereo ch. on 4 Ohms, C bridged ch. on 2 Ohms . . . . . . . . .2x75W + 2x75W + 1x500 (RMS)

7) A,B stereo ch. on 2 Ohms, C bridged ch. on 2 Ohms . . . . . . . . .2x110W + 2x110W + 1x430 (RMS)

CONTINUOUS POWER 3 CHANNELS Tol.: (+10%/-5%); 1% THD; 13.8 VDC

8) A,B,C bridged ch.on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . .1x240W + 1x240W + 1x300 (RMS)

9) A,B bridged ch. on 4 Ohms, C bridged ch. on 2 Ohms . . . . . . . . .1x220W + 1x220W + 1x430 (RMS)

THD DISTORTION (1 kHz; 90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . .0.02%

IMD DISTORTION (90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.04%

BANDWIDTH (-3dB; Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Hz ÷ 70 kHz

S/N RATIO (A weighed - 1 VRMS input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 dBA

REMOTE IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 ÷ 15 VDC

REMOTE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VDC - 150 mA

INPUT SENSITIVITY (high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.15 ÷ 1.5 VRMS

INPUT SENSITIVITY (low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.50 ÷ 5.0 VRMS

INPUT IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 kOhms

LOAD IMPEDANCE (stereo) ch.A and ch.B . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 Ohms

LOAD IMPEDANCE (bridged) ch.A and ch.B . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 Ohms

LOAD IMPEDANCE (stereo) ch.C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 -1 Ohm

LOAD IMPEDANCE (bridged) ch.C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 Ohms

SIZE (W x H x D) mm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 x 64 x 585

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.4 x 2.5 x 23

INTERNAL FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80A

ABSORBED CURRENT AT MAXIMUM MUSICAL POWER - EXTERNAL FUSE CHOICE

13.8V - configuration 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33A

13.8V - configurations 2) and 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64A

13.8V - configurations 3) and 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47A

13.8V - configurations 4) and 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66A

13.8V - configurations 7) and 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80A

Measures were realised through a test-set consisting of Rohde & Schwarz UPD audio analyser, HP 6453A power supply (200A continuous) and 14F capacitive booster made with audison cable Superfarad capacitors.

Please always choose a fuse of equal or slightly higher value (max 10%) than indicated. Note:

The use of MAC2 cooling system is strongly recommended when the amplifier is employed at full power with 1 Ohm stereo or 2 Ohm bridged loads.

- 62 -

- 8 -

VRx6.420

2000

EDITION

- 61 -

Dynamic Sub Control

Controls panel

VRx Control Extensions DSC1

Dynamic Sub Control

Functions diagram

Controls description

PG-

Gain adjustment

PF -Frequency adjustment PT -Time delay adjustement

Short guide

It is a parametric pole which permits to make up for subwoofers volumetric inadequacy by having their low frequencies gain extent and impact. DSC1 adjusts its intervention by increasing it at low signal levels and avoiding the amplifier saturation. Its controls allow to choose frequency, intervention and gain.

It consists of a cooling group formed by a pair of fans with spacers and by a temperature control module (TFC) to put inside VRx amplifiers. The fans group is placed inside Raccords and Terminals and adapted to several lengths through spacers. VRx amplifiers have a power supply connector dedicated to the cooling group under the power supply terminal blocks panel. Raccords and Terminals act as ducts for cooling air and have the esthetical function of covering connection cables. One terminal (TRM4, TRM6) with MAC2 kit is enough for the cooling system correct functioning. If you like

to put two VRx one after the other, you have to use a suitably long Raccord (RC08, RC10, RC12) which, if necessary, can also be supplied with MAC2, installed into the second VRx. The end of the second VRx (inputs and warm air output side) is able to accept another Terminal (TRM4, TRM6) for esthetical reasons. Raccords and Terminals are chosen according to the size of used cables and connectors, while the installation of one or more MAC2 depends on VRx amplifiers configuration.

VRx Control Extensions MAC2

Forced air cooling system

- 9 -

System temperature control kit.

Fans group

VCRDK

It consists of VCRD adjuster and of VCA1D, a high performances digital control module. It can be used to adjust the volume of sub or of every VRx amplifier in the system.

If it is installed into BTX2, it permits to realise Master Volume Control. Thanks to a single VCRD adjuster connected to the main BTX2 (Master), supplied with VCA1D module (VCRKD kit), it is possible to adjust the volume of other stereo ways through as many secondary BTX2 (Slave) connected in cascade and supplied with VCA1D modules. VCA1D modules are available also individually. Master Volume Control configuration is necessary when you want to have volume independent general adjustment in multichannel systems for Front, Rear and Sub outputs of head units supplied with them. The control microprocessor permits to store and recall a level; this function is useful to keep the reference calibration in a multiamplified system, for instance. If the latter totally consists of VRx1 or VRx2 amplifiers, the installation of one VCRDK for every amplifier would allow the level adjustment of each way of the system.

Some stickers allow VCRD customisation according to its function. It is also

possible to remove its housing in order to easily mount it behind a panel, while VCRD front panel stays visible.

VRx Control Extensions VCRDK and VCA1D

Digital remote volume control kit

VCRD

VCA1D

Kit for sub remote volume control, supplied with VCA (Voltage Controlled Amplifier) with digital control.

TFC module

TRM4 and TRM6

INSTRUCTIONS

Put the Terminal or the Raccord onto a flat surface. (As far as Terminals are concerned, the side with grilles must be facing upwards). Remove the front plate fixed through four screws by using multispanner supplied with the devices (pict. 1 and 2). Place the fans groups onto the flat surface and push them in order to insert them inside the extension body you are using, so that the fans group support guides snap into the slots (pict. 3).

Warning!: Do not push hard onto the fans wheel while mounting the fans group.

Fans group insertion inside Terminals and Raccords

After inserting the fans, mount Terminals front plate back again (pict. 4). If parts were assembled in the right way, the fans wheels will be in the same side as the grilles of the plate itself.

TRM4 and TRM6

TRM6

General procedure for insertion inside Raccords

Remark for TRM4:

Do not turn the Terminal body while mounting it. Its correct direction is when the screw in the wooden strip is closer to the flat surface the terminal lies onto (pict. 2).

Remark for TRM6: Insert the special spacers inside TRM6 in order to avoid air flux dispersion by making them slide onto the terminal proper slots until they touch the fans.

Remark for Raccords: Insert the fans and a sufficient number of spacers into the Raccord by making them slide onto the proper slots, in order to avoid air flux dispersion. The last spacer must always be a Terminal Spacer.

General procedure for insertion inside Terminals

- 10 -

VRx4.300 connections

Inputs and outputs:

bridge connection

Power supply, remote and accessories Inputs and outputs:

stereo connection

Inputs and outputs:

Front + Sub

- 59 -

Please see “Technical Features” and “External fuse size and location” in order to choose the proper external fuse.

VRx Control Extensions BTX2

- 11 -

PHANTOM

power supply.

ON led.

BTX2

saturation led.

Gain switch.

Stereo balancer/preamplifier with audison ABS system.

Master/Slave configuration of BTX2 devices with VCRD. SDA and SCL outputs (serial OUT) of the main BTX2 (Master) must be connected to VCR contacts of the secondary BTX2 (slave).

Stereo balancer/preamplifier

PH450

PH150(150cm)

and PH650(650cm) are available in

audison cable

line, besides

PH450(450cm)

Contacts for connecting VCRD adjuster. In Master/Slave configuration of BTX2 devices with VCRD, these contacts become Serial IN input for the secondary BTX2 (slave).

NOTE:

It is necessary to insert an ABS JACK (audison cable) in order to get a balanced signal. It is possible to have an unbalanced signal by inserting a standard PIN RCA into ABS sockets. In this case, output voltage value decreases; it can be increased again through GAIN switch.

ABS balanced outputs (see NOTE).

RCA unbalanced inputs.

Front panel Rear panel

FEATURES

BTX2 is a device which allows you to change a pre output of an ordinary head unit into a balanced output with audison ABS system. In this way it is possible to realise an ABS balanced connection between signal source and

amplifier input by using audison cable ABS extensions.

BTX2 has got phantom power supply: it is therefore necessary to connect it to

audison VRx amplifiers proper output through PH450 cable (given with BTX2).

BTX2 has a three-step gain control, in order to interface with various sources. A led indicates outputs saturation (clipping). BTX2 allows also Remove Volume Control function, which permits to adjust the level of a stereo or a mono line. In

order to activate this function, you need to use the VCR

(Remote Volume Control) kits: VCRDK.

SDA SCL

5 VRMS max

- 58 -

TPC VRx4 power supply controller. It must not be removed.

TFC

(supplied with MAC2)

CONTROL

EXTENSIONS

PRM3 for A channels

CONTROL

EXTENSIONS

DMRX socket for a

future extension. Do not put any modules into it.

Socket for:

- VCA1D, given with VCRDK

CONTROL

EXTENSIONS

VCA

PRM3 for B channels

SM24

CONTROL

EXTENSIONS

PC36

CONTROL

EXTENSIONS

LD1 VRx4 driver

stages. They must not be removed.

Canali A

Canali B

VRx4.300

Controls under

wooden strip

BYP08 bridge: 4+4 Pins

Modular extensions

Serial modules

BYP12 bridge: 6+6 Pins

VRX4CD-S VRx4 controls. They must not be removed.

WHERE TO PUT MODULAR EXTENSIONS

24dB/oct. Mono SUB filter slope configurations

VRx4.300

- 57 -

S3 (12-24dB/oct. SUB filter slope switch) = K3 (MONO/STEREO switch of A channels) =

2 INPUTS: IN1 Front L and R inputs, IN2 Rear L and R inputs; non fading sub. 1 INPUT: IN L and R inputs, IN2 not used; sub mix R+L.

SUB MONO 24 dB

HI FRONT

Power: 75 W + 75 W

Filter Bypass

40 Hz ÷ 5 kHz

HI REAR

Filter Bypass

40 Hz ÷ 5 kHz

40 Hz ÷ 500 Hz

N° Ch “A” amps. Ch “B” amps. PREAMPLIFIED

Switch

config.

STEREO loudspeakers outputs

Power

Outputs

Signal out on RIGHT ch.

(LEFT not used)

N° Ch “A” amps. Ch “B” amps. PREAMPLIFIED

Switch

config.

STEREO

loudspeakers outputs

Power

Outputs

STEREO line outputs

HI FRONT

40 Hz ÷ 5 kHz

HI REAR

40 Hz ÷ 5 kHz

SUB MONO 24 dB

MONO

loudspeakers outputs

K6= K6=

2 INPUT: IN1 i

nput Front L e R, IN2 input Rear L e R; non fading sub.

1 INPUT: IN1 input L e R, IN2 not used; sub mix R+L.

K6 = K6 =

N°

Ch “A” amps.

Left section

Ch “B” amps.

Right section

PREAMPLIFIED

Switch

config.

MONO loudspeakers outputs

Power

Outputs

HI-PASS

MONO line outputs

(LEFT not used)

Filter Bypass

40 Hz ÷ 5 kHz

HI-PASS

Filter Bypass

40 Hz ÷ 5 kHz

SUB MONO 24dB

40 Hz ÷ 500 Hz

INPUTS: use IN1 (R) for Left ch, use IN2 (R) for Right ch.K6 =

(RIGHT)

K4 (MONO/STEREO switch of B channels) = R3 (F3 x 1/x10 LO-PASS frequency switch) =

S3 (12-24dB/oct. SUB filter slope switch) = K3 (MONO/STEREO switch of A channels) =

K4 (MONO/STEREO switch of B channels) = R3 (F3 x 1/x10 LO-PASS frequency switch) =

S3 (12-24dB/oct. SUB filter slope switch) = K3 (MONO/STEREO switch of A channels)=

K4(MONO/STEREO switch of B channels

) =

with active Constant Bass

40 Hz ÷ 500 Hz

Power: 250W

Power: 75 W + 75 W

Filter Bypass

Power: 75 W + 75 W

Power: 250 WPower: 250 W

* Warning: Using B channels in Mono (K4 = ) with 12dB/Oct. filter, signal for sub depends on Right input. If

you move Balance onto the Left channel in this condition, sub will not play. It is therefore necessary to set B channels in stereo (K4 = ) in order to obtain the sum between Left and Right.

- HL12 12 dB HI/LO-PASS crossover

- BH12 12 dB BAND/HI-PASS crossover

- LM24 24 dB LO-PASS MONO crossover

- HL24 12/24 dB HI/LO-PASS crossover

- BSA1 stereo balanced pre out repeater

VRx MODULAR EXTENSIONS:

MULTICHANNEL EXTENSIONS

WARNING!

Apply to Audison’s specialised installation centres for the installation and

configuration of modular extensions described in this section

(only for models: VRx1.500, VRx2.150, VRXx2.250 and VRx2.400)

2000

EDITION

- 13 -- 56 -

K4 (MONO/STEREO switch of B channels) =

Power: 250W (Mono) 75W+75W (Stereo)

N°

Ch “A” amps. Ch “B” amps. PREAMPLIFIED

Switch

config.

STEREO loudspeakers outputs

Power

Outputs

MID-HI FRONT WOOFER FRONT

40 Hz ÷ 130 Hz

40 Hz ÷ 5 kHz

HI REAR

WOOFER FRONT

3/4

SUB

40 Hz ÷ 5 00 Hz

SUB

40 Hz ÷ 5 00 Hz

STEREO line outputs

Filter Bypass

40 Hz ÷ 5 kHz

MID-HI FRONT

Power: 75 W + 75 W

Filter Bypass

40 Hz ÷ 5 kHz

HI-REAR

Power: 75 W + 75 W

Filter Bypass

40 Hz ÷ 5 kHz

HI FRONT

Power: 75 W + 75 W

Filter Bypass

40 Hz ÷ 5 kHz

HI FRONT

Filter Bypass

40 Hz ÷ 5 kHz

HI REAR

Power: 75 W + 75 W

Filter Bypass

40 Hz ÷ 5 kHz

HI REAR

Filter Bypass

40 Hz ÷ 5 kHz

Filter Bypass

40 Hz ÷ 5 kHz

40 Hz ÷ 130 HzF340 Hz ÷ 5 kHz

N°

Ch “A” amps.

Left section

Ch “B” amps.

Right section

PREAMPLIFIED

Switch

config.

MONO loudspeakers outputs

Power

Outputs

HI-PASS

Power: 250 W

MONO line outputs

Filter Bypass

40 Hz ÷ 5 kHz

HI-PASS

Power: 250 W

Filter Bypass

40 Hz ÷ 5 kHz

SUB

40 Hz ÷ 500 Hz

K6= K6=

S3 (12-24dB/oct. SUB filter slope switch) = K3 (MONO/STEREO switch of A channels ) =

INPUTS: use IN1 (R) for Left ch, use IN2 (R) for Right ch.K6 =

K4 (MONO/STEREO switch of B channels) =

S3 (12-24dB/oct. SUB filter slope switch) = K3 (MONO/STEREO switch of A channels ) =

Power: 75 W + 75 W

VRx4.300

B1=F1 filter BYPASS B4=F4 filter BYPASS F1= HI-PASS filter F2= HI-PASS filter of woofer BAND-PASS

(MM= ), it does not work if MM=

F3= LO-PASS filter of woofer BAND-PASS

(MM= ) or subwoofer LO-PASS filter (MM= )

F4= HI-PASS filter

= Released switch

= Pushed switch

12dB/oct. SUB filter slope configurations

Power: 75 W + 75 W

2 INPUTS: IN1 Front L and R inputs, IN2 Rear L and R inputs; non fading sub. 1 INPUT: IN1 L and R inputs, IN2 not used.

Module description

Filter slope: 12dB/oct. Continuous adjustment through 2 steps: 40÷500Hz; 400÷5000Hz. HL12 adds one ABS PRE output to the amplifier it is installed into.

Features

Installed into VRx1 or VRx2, HL12 permits to drive stereo/mono SUB section with 12dB cut. HI-PASS output permits to drive an amplifier without crossover (non independent crossover frequency). The BYPASS output of the first amplifier allows the independent control of HI-PASS frequencies by adding a VRx2 supplied with another HL12. In combination with another VRx2 supplied with HL12, the use of HI-PASS output also allows the creation of BANDPASS sections.

Uses

HL12 is a very versatile and polyvalent module. It can be used in the simplest bi-amplified systems, in REAR section or in high performances multiamplified systems. According to VRx philosophy, it is the “factotum” you have to keep at hand, because it is always possible to filter a system through it. It is the ideal partner for VRx2 and LM24.

VRx1 - VRx2 Multichannel Extensions HL12

Frequencies ranges: 40 Hz ÷ 500 Hz; 400 Hz ÷ 5 kHz

12dB/oct. HI-PASS/LO-PASS

Controls

panel

Short guide

Sticker to put onto VRx1 and VRx2 short guide together with Block Diagram one

Block diagram

Ke - BALANCED (B)/UNBALANCED (U) switch for PRE OUT output. Fe - 12dB/oct. HI/LO-PASS crossover frequency adjustment. Re - Fe x 10 (x10)/x1 (x1) frequency switch. He - 0˚ (0˚)/180˚ (180˚) phase shifting switch for amplifier output. Se - HI-PASS (H)/LO-PASS (L) switch for PRE OUT output. Be - BYPASS (B)/FILTERED (F) switch for PRE OUT output.

Controls description

- 14 -

OUT PRE-OUT

HI/LO-PASS

BYPASS

Bypass

Crossover module for VRx1 and VRx2, with non independent HI/LO-PASS crossover frequency.

12 dB/oct. 12 dB/oct.

12 dB/oct.

Crossover

Possible

configurations

- 55 -

Short guide under wooden strip

It shows internal crossover, outputs configurations and controls meaning

VRx4.300

Module description

BAND/HI-PASS section (Lower frequency): 12dB/oct. filter slope. Variable frequency between 40Hz and 2kHz, through 2 steps: 40Hz÷280Hz; 280Hz÷2kHz. Continuous adjustment. BAND/LO-PASS (Higher frequency) and HI-PASS section: 12dB/oct. filter slope. Variable frequency between 150 and 5000Hz. Continuous adjustment. BH12 adds one ABS PRE output to the amplifier it is installed into.

Features

It allows the extension to higher frequency ranges in multiamplified systems. Together with HL12, it permits the frequencies total independent control.

Uses

BH12 is especially designed for multiamplification. Its high internal complexity makes its use simple and evident. It is VRx2 partner and it is ideal for HL12 and LM24.

VRx2 Multichannel Extensions BH12

Crossover module for VRx2 with BAND-PASS filter with independent adjustments and non independent HI-PASS crossover frequency.

- 15 -

OUT PRE OUT

BYPASS

Bypass

Possible

configurations

Crossover

F1 frequencies ranges: 40 Hz ÷ 280 Hz; 280 Hz ÷ 2 kHz

12dB/oct. BAND-PASS/HI-PASS

Controls

panel

Short guide

Sticker to put onto VRx2 short guide together with Block Diagram one

Block diagram

Ke - BALANCED (B)/UNBALANCED (U) switch for PRE OUT output.

F1 - 12dB/oct. BAND-PASS lower frequency adjustment.

R1 - F1 x 7 (x7)/x1 (x1) frequency switch.

F2 - 12dB/oct. BAND-PASS higher frequency and 12dB/oct.

HI-PASS lower frequency adjustment.

He - 0˚ (0˚)/180˚ (180˚) phase shifting switch for amplifier output.

Be - BYPASS (B)/HI-PASS (F) switch for PRE OUT output.

Controls description

F2 frequency range:150 Hz ÷ 5 kHz

F2 F2

12 dB/oct.

K1-Bal/Unbal inputs switch. K2-LNS circuit ON/OFF switch

for line noise suppression.

K3, K4 - Mono / Stereo

switch for A and B amplifiers pairs respectively.

K5-It selects sensitivity

range of all inputs.

LA, LB - Input sensitivities

adjustment of A and

B amplifiers pairs respectively.

K6-1/2 inputs pairs

switch.

K7-Bal/Unbal switch for

PRE output. It is possible to have a balanced output signal even with an unbalanced input one.

F2 -Filter used only in

Multichannel mode in

order to have a BAND-PASS.

F3 -LO-PASS filter which

can be set at 24dB/oct.

slope ONLY in mono configuration,

40-500 Hz range, for subwoofer (F/R mode).

MM and OM - They select internal crossover

functioning modes. Please see VRx block

diagram and uses in order to understand how they act.

Warning: When SM24 is used for B Channels, the latter will have to be configured in mono. K4 must be put onto Mono.

Note: In case of installations with more amplifiers connected in cascade, we recommend to put K2 onto ON in the device which receives the signal from the head unit, leaving it onto OFF in the others. If disturbance persists, please try to activate LNS anti- noise circuit also in the other amplifiers.

Controls description

Short guide

Controls and functions

Leds

Controls under

wooden strip

Short guide

A Channels

B Channels

VRx4.300

ON - Green led

It indicates the amplifier is on.

SAFETY - Red led

PEAK LA - LB - RA - RB - Orange leds

They are on when one or more VRx amplifiers are about to reach distortion threshold. They are useful to adjust inputs sensitivity.

- 54 -

Module description

24dB/oct. filter slope. Variable frequency between 40Hz and 90Hz. Continuous adjustment. LM24 adds one ABS PRE output to the amplifier it is installed into.

Features

Installed onto VRx1 or VRx2, it permits to drive SUB section in MONO with cut at 24dB. BYPASS output allows the addition of another VRx2 filtered with HL12 or BH12 in order to have independent HI-PASS control.

LO-PASS output permits to add another amplifier to boost SUB section; naturally, in this case, a full range signal coming from a VRx2 with HL12 must be sent to the input of the amplifier where LM24 is installed, and VRx2 and HL12 will handle HI-PASS section.

Note: LM24 includes only a LO-PASS section and, thus, it does not permit to use PC36 since the latter must be employed together with a HI-PASS section in order to

function in the right way (see part B, p. 5).

Uses

LM24 is especially designed for SUB section and has the advantages of cut at 24dB. It is indispensable both in bi-amplified systems and multiamplified ones. It is the ideal partner of VRx1 and HL12.

Controls

panel

VRx1 - VRx2 Multichannel Extensions LM24

- 16 -

Short guide

Sticker to put onto VRx1 and VRx2 short guide together with Block Diagram one.

Block diagram

Ke - BALANCED (B)/UNBALANCED (U) switch for PRE OUT output. Fe - 24dB/oct. LO-PASS filter adjustment. He- 0˚ (0˚)/180˚ (180˚) phase shifting switch for amplifier output. Be - BYPASS (B)/LO-PASS (F) switch for PRE OUT output.

Controls description

Crossover

Frequency range: 40 Hz ÷ 90 Hz

24dB/oct. mono LO-PASS

OUT PRE OUT

BYPASS

Bypass

24 dB/oct.

Crossover module for VRx1 and VRx2 with LO-PASS MONO cut and L/R channels mixing.

Possible

configurations

- 53 -

Block diagram

VRx4.300

Optional modules

Module description

LO-PASS section is MONO and mixes R and L channels. HI-PASS section is Stereo. HL24 adds an ABS PRE output to the amplifier it is installed into.

Features

It permits to drive SUB section in MONO with cut at 24dB. Its preamplified HI-PASS output can be sent to another amplifier without crossover or to a VRx2 with HL12 module in order to realise a BAND-PASS section. Module outputs can be exchanged one with the other; in this way, the amplifier where the module is installed can be used for front system; the PRE output can be employed to drive an external amplifier dedicated to SUB.

Uses

HL24 is especially designed for bi-amplified systems since it handles SUB crossover point. It is, however, a very flexible device which allows its use also when other functions are needed. It is the ideal partner for VRx1 and VRx2.

Crossover

F1 frequency range: 40 Hz ÷ 120 Hz

12dB/oct. HI-PASS - 24dB/oct. LO-PASS

F2 frequency range : 40 Hz ÷ 90 Hz

- 17 -

Controls

panel

VRx1 - VRx2 Multichannel Extensions HL24

Short guide

Sticker to put onto VRx1 and VRx2 short guide together with Block Diagram one.

Ke - BALANCED (B)/UNBALANCED (U) switch for PRE OUT output. F1 - 12dB/oct. HI-PASS filter adjustment. F2 - 24dB/oct. LO-PASS filter adjustment. He - 0˚ (0˚)/180˚ (180˚) phase shifting switch for amplifier output. Se - HI-PASS (H)/LO-PASS (L) switch for PRE OUT output. Be - BYPASS (B)/FILTERED (F) switch for PRE OUT output.

Controls description

OUT PRE OUT

HI/LO-PASSBeBYPASS

Bypass

24 dB/oct.

12 dB/oct.

24 dB/oct.

12 dB/oct.

Crossover module for VRx1 and VRx2 with independent HI/LO-PASS crossover frequency.

Possible

configurations

Block diagram

VRx4.300

Technical features

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ÷ 15 VDC

IDLING CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2 A

IDLING CURRENT WHEN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.04 mA

CONTINUOUS NOMINAL POWER Tol.: (+10%/-5%); 0.3% THD; 12 VDC

4 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 W x 4 (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 12.6 VDC

4 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110 W x 4 (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 13.8 VDC

4 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110 W x 4 (RMS)

4 ch on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175 W x 4 (RMS)

4 ch on 1 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220 W x 4 (RMS)

2 ch bridged on 4 Ohms + 2 ch bridged on 4 Ohms . . . . . . . . . . . . . . . . . . . .350 W + 350 W (RMS)

2 ch bridged on 2 Ohms + 2 ch bridged on 2 Ohms . . . . . . . . . . . . . . . . . . . .440 W + 440 W (RMS)

2 ch on 4 Ohms + 2 ch bridged on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . .102 W x 2 + 380 W (RMS)

2 ch on 4 Ohms + 2 ch bridged on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . .90 W x 2 + 530 W (RMS)

THD DISTORTION (1 kHz; 90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.02 %

IMD DISTORTION (90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.04 %

BANDWIDTH (-3dB; Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Hz ÷ 70 kHz

S/N RATIO (A weighed - 1 VRMS input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 dBA

REMOTE IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 - 15 VDC

REMOTE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VDC ÷ 150 mA

INPUT SENSITIVITY (high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.15 ÷ 1.5 VRMS

INPUT SENSITIVITY (low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.50 ÷ 5.0 VRMS

INPUT IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 kOhms

LOAD IMPEDANCE (stereo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 - 1 Ohm

LOAD IMPEDANCE (bridged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 Ohms

SIZE (W x H x D) mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 x 64 x 499

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.4 x 2.5 x 19.6

INTERNAL FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70A

ABSORBED CURRENT AT MAXIMUM MUSICAL POWER - EXTERNAL FUSE CHOICE

13.8V - 4 ch. x 4 Ohms or 2 bridged ch. x 8 Ohms + 2 bridged ch.x 8 Ohms . . . . . . . .27 A

13.8V - 4 ch. x 2 Ohms or 2 bridged ch. x 4 Ohms + 2 bridged ch. x 4 Ohms . . . . . . .47 A

13.8V - 4 ch. x 1 Ohm or 2 bridged ch.x 2 Ohms + 2 bridged ch. x 2 Ohms . . . . . . . .70 A

13.8V - 2 ch. x 4 Ohms + 2 bridged ch. x 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . .38 A

13.8V - 2 ch. x 4 Ohms + 2 bridged ch. x 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . .52 A

Please always choose a fuse of equal or slightly higher value (max 10%) than indicated.

Note: The use of MAC2 cooling system is strongly recommended when the amplifier is employed at full power with 1 Ohm stereo or 2 Ohm bridged loads.

- 52 -

Module description

BSA1 adds an ABS PRE output to the amplifier it is installed into. It permits to amplify and repeat the same frequencies range as VRx amplifier it is installed into.

Note: BSA1 does not have crossover sections; it is therefore not possible to use it with PC36 since the latter

must be employed together with a HI-PASS section in order to function in the right way (see part B, p. 5).

Uses

It is especially recommended for VRx1 and VRx2, dedicated to SUB through an external filtered source, when you like to increase the system power. You can add as many amplifiers as you like, connected in cascade.

- 18 -

Stereo balanced line repeater

Controls

panel

Short guide

Sticker to put onto VRx1 and VRx2 short guide together with Block Diagram one

Block diagram

Ke - BALANCED (B)/UNBALANCED (U) switch for PRE OUT

output.

Controls description

VRx1 - VRx2 Multichannel Extensions BSA1

Pre input repeater stereo module (BYPASS) for VRx1 and VRx2.

VRx4.300

2000

EDITION

- 51 -

- 19 -

Updating of short guide under wooden strip

VRx 2.150 - VRx2.250 - VRx2.400 connections

Inputs and outputs: bridge connection

Power supply, remote and accessories Inputs and outputs: stereo connection

Inputs and outputs: Tri-mode connection

- 50 -

Please see “Technical Features” and “External fuse size and location” in order to choose the proper external fuse.

- 49 -

VRx2.400

SM24

CONTROL

EXTENSIONS

TPC VRx2 power supply

controller. It must not be removed.

Socket for:

- VCA1D, given with VCRDK

CONTROL

EXTENSIONS

VCA

TFC

(supplied with MAC2)

CONTROL

EXTENSIONS

HL12 - BH12 - LM24

HL24 - BSA1

MULTICHANNEL

EXTENSIONS

PRM3

CONTROL

EXTENSIONS

PC36

CONTROL

EXTENSIONS

DMRX socket for a

future extension. Do not put any modules into it.

VRX2C VRx2 controls. They must not be removed.

Controls under

wooden strip

BYP08 bridge: 4+4 Pins

Modular Extensions

Serial modules

BYP12 bridge: 6+6 Pins

LD1 VRx2 driver stages. They must not be removed.

WHERE TO PUT MODULAR EXTENSIONS

- Raccords: RC08 - RC10 - RC12

- Terminals: TRM4 - TRM6

MODULAR EXTENSIONS:

COOLING DUCT EXTENSIONS

- 21 -

WARNING!

Apply to Audison’s specialised installation centres for the installation and

configuration of modular extensions described in this section

2000

EDITION

- 48 -

SM24

CONTROL

EXTENSIONS

TPC VRx2 power

supply controller. It must not be removed.

Socket for:

- VCA1D, given with VCRDK

CONTROL

EXTENSIONS

VCA

TFC

(supplied with MAC2)

CONTROL

EXTENSIONS

HL12 - BH12 - LM24

HL24 - BSA1

MULTICHANNEL

EXTENSIONS

PRM3

CONTROL

EXTENSIONS

PC36

CONTROL

EXTENSIONS

DMRX socket for a

future extension. Do not put any modules into it.

LD1 VRx2 driver stages. They must not be removed.

VRx2.150 - VRx2.250

Controls under

wooden strip

BYP08 bridge: 4+4 Pins

Modular Extensions

Serial modules

BYP12 bridge: 6+6 Pins

VRX2C VRx2 controls. They must not be removed.

WHERE TO PUT MODULAR EXTENSIONS

Terminals and Raccords

VRx Cooling duct extensions TRM4 - TRM6 - RC08 - RC10 - RC12

- 22 -

TRM4

TRM6

RC08

RC10

RC12

Cooling Duct Extensions are terminals and raccords which have two functions:

- Esthetical

- Technical

Esthetical function: they cover connections and make

installation more elegant.

Technical function: they contain MAC2 kit fans and drive air into the heat sink hollows.

Terminals and Raccords are available in different lengths, in order to be able to realise a system which privileges space for connections or compactness.

Short guide under wooden strip

It shows output configurations and meaning controls

- 47 -

VRx2.150 - VRx2.250 - VRx2.400

Terminals: installation of TRM4 and TRM6

2 3 4

How to put logo in the right way in case the amplifier is mounted upside down

Plate mounting with hidden fixing screws

TRM4: mounting into VRx

A - Self-tapping screws

(Ø 4.8 mm) at sight.

- Remove the wooden strip

1 3 4

- 23 -

5 6 7

C- MA4 screws at sight.

A - Self-tapping screws

(Ø 4.8 mm) at sight.

B - Hidden MA4 screws.

C- MA4 screws at sight.

B - Hidden MA4 screws.

Note: Please use the special multispanner supplied with the devices in order to carry out these operations.

TRM6: mounting into VRx

Controls and functions

Controls under

wooden strip

Short guide

K1 - Bal/Unbal inputs switch.

K2 - LNS circuit ON/OFF switch for line noise

suppression.

K3 - Mono/Stereo switch. In mono, the amplifier

input is the one which is commonly used for right channel (R).

K4 - It selects sensitivity range.

LR, LL - Input sensitivities adjustment of right and

left channel respectively. When the amplifier is in mono, adjustment is made through LR.

ON - Green led

It indicates the amplifier is on.

SAFETY - Red led

PEAK L - R - Orange leds

They are on when one or more VRx amplifiers are about to reach distortion threshold. They are useful to adjust inputs sensitivity.

Controls description

Leds

Warning - When SM24, mono subsonic filter for

SUB, is employed, the amplifier cannot be used in stereo. K3 has to be set on Mono.

Note: In case of installations with more amplifiers connected in cascade, we recommend to put K2 onto ON in the first device (i.e. the one which receives the signal from the head unit), leaving it onto OFF in the others. If disturbance persists, you can activate LNS anti- noise circuit also in the other amplifiers.

- 46 -

VRx2.150 - VRx2.250 - VRx2.400

- 24 -

Side without customised inscription

Side with customised inscription

VRx logo fixing into wooden strip

1 2 3

RC08 – RC10 – RC12: fixing onto VRx

Raccords: installation of RC08, RC10 and RC12

Note: Please use the special multispanner supplied with the devices in order to carry out these operations.

Block diagram

VRx2.150 - VRx2.250 - VRx2.400

- 45 -

Optional modules

RESPECT THE ALIGNMENT

VRx LOGO

STICKER

STRIP

WOODEN

Wooden strip removal

Unscrew the two fixing screws.

Disconnect the wire for logo illumination.

It is sometimes necessary to install VRx so that its audison logo is upside down. Rotate it of 180˚ according to the instructions written below in order to have it in the right position again.

You need to remove the wooden strip which protects calibration and configuration controls in order to act onto them. The wooden strip removal is also necessary to install modular extensions which require the plate replacement: PRM3, SM24, PC36, DSC1, HL12, BH12, HL24, LM24, BSA1.

Lift the printed circuit and rotate the transparent inscription of 180˚ (as from drawing). Mount everything back again.

- 25 -

SHORT

GUIDE

Remove the wooden strip.

Turn the wooden strip upside down and unscrew the four screws.

2 3

Illuminated logo rotation

Inputs panel with

multichannel

extensions:

HL12 - BH12 - LM24

HL24 - BSA1

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ÷ 15 VDC

IDLING CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.1 A

IDLING CURRENT WHEN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.04 mA

CONTINUOUS NOMINAL POWER Tol.: (+10%/-5%); 0.3% THD; 12 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 W + 200 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 12.6 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250 W + 250 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 13.8 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250 W + 250 W (RMS)

2 ch on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .450 W + 450 W (RMS)

2 ch on 1 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .580 W + 580 W (RMS)

1 ch bridged on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .900 W (RMS)

1 ch bridged on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1160 W (RMS)

THD DISTORTION (1 kHz; 90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.02 %

IMD DISTORTION (90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.06 %

BANDWIDTH (-3dB; Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Hz ÷ 70 kHz

S/N RATIO (A weighed - 1 VRMS input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 dBA

REMOTE IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 ÷ 15 VDC

REMOTE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VDC - 150 mA

INPUT SENSITIVITY (high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.15 ÷ 1.5 VRMS

INPUT SENSITIVITY (low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.50 ÷ 5.0 VRMS

INPUT IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 kOhms

LOAD IMPEDANCE (stereo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 - 1 Ohm

LOAD IMPEDANCE (bridged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 Ohms

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 x 64 x 432

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.4 x 2.5 x 17

INTERNAL FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100A

ABSORBED CURRENT AT MAXIMUM MUSICAL POWER - EXTERNAL FUSE CHOICE

13.8V - 4 Ohms stereo or 8 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 A

13.8V - 2 Ohms stereo or 4 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 A

13.8V - 1 Ohm or 2 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97 A

Please always choose a fuse of equal or slightly higher value (max 10%) than indicated. Note: The use of MAC2 cooling system is strongly recommended when the amplifier is employed at full power with 1 Ohm stereo or 2 Ohm bridged loads.

Technical features

VRx2.400

- 44 -

Inputs panel with

multichannel

extensions:

HL12 - BH12 - LM24

HL24 - BSA1

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ÷ 15 VDC

IDLING CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.7 A

IDLING CURRENT WHEN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.04 mA

CONTINUOUS NOMINAL POWER Tol.: (+10%/-5%); 0.3% THD; 12 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125 W + 125 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 12,6 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160 W + 160 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 13,8 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160 W + 160 W (RMS)

2 ch on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .280 W + 280 W (RMS)

2 ch on 1 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .420 W + 420 W (RMS)

1 ch bridged on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .560 W (RMS)

1 ch bridged on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .840 W (RMS)

THD DISTORTION (1 kHz; 90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.02 %

IMD DISTORTION (90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.06 %

BANDWIDTH (-3dB; Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Hz - 70 kHz

S/N RATIO (A weighed - 1 VRMS input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 dBA

REMOTE IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 ÷ 15 VDC

REMOTE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VDC - 150 mA

INPUT SENSITIVITY (high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.15 ÷ 1.5 VRMS

INPUT SENSITIVITY (low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.50 ÷ 5.0 VRMS

INPUT IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 kOhms

LOAD IMPEDANCE (stereo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 - 1 Ohm

LOAD IMPEDANCE (bridged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 Ohms

SIZE (W x H x D) mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 x 64 x 382

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.4 x 2.5 x 15

INTERNAL FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60A

ABSORBED CURRENT AT MAXIMUM MUSICAL POWER - EXTERNAL FUSE CHOICE

13.8V - 4 Ohms stereo or 8 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 A

13.8V - 2 Ohms stereo or 4 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 A

13.8V - 1 Ohm or 2 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59 A

Ohm stereo or 2 Ohm bridged loads.

Technical features

VRx2.250

- 43 -

- General recommendations

- Cables size

- External fuse size and location

- Internal fuse replacement

- VRx size

VRx INSTALLATION

- 27 -

2000

EDITION

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ÷ 15 VDC

IDLING CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4 A

IDLING CURRENT WHEN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.04 mA

CONTINUOUS NOMINAL POWER Tol.: (+10%/-5%); 0.3% THD; 12 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 W + 75 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 12,6 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 W + 110 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 13,8 VDC

2 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 W + 110 W (RMS)

2 ch on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 W + 180 W (RMS)

2 ch on 1 Ohm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240 W + 240 W (RMS)

1 ch Bridged on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360 W (RMS)

1 ch Bridged on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480 W (RMS)

THD DISTORTION (1 kHz; 90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.02 %

IMD DISTORTION (90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.04 %

BANDWIDTH (-3dB; Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Hz ÷ 70 kHz

S/N RATIO (A weighed - 1 VRMS input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 dBA

REMOTE IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 ÷ 15 VDC

REMOTE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VDC - 150 mA

INPUT SENSITIVITY (high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.15 ÷ 1.5 VRMS

INPUT SENSITIVITY (low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.50 ÷ 5.0 VRMS

INPUT IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 kOhms

LOAD IMPEDANCE (stereo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 - 1 Ohm

LOAD IMPEDANCE (bridged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 Ohms

SIZE (W x H x D) mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 x 64 x 332

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.4 x 2.5 x 13

INTERNAL FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40A

ABSORBED CURRENT AT MAXIMUM MUSICAL POWER - EXTERNAL FUSE CHOICE

13.8V - 4 Ohms stereo or 8 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 A

13.8V - 2 Ohms stereo or 4 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 A

13.8V - 1 Ohm stereo or 2 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 A

Please always choose a fuse of equal or slightly higher value (max 10%) than indicated.

Note:

The use of MAC2 cooling system is strongly recommended when the amplifier is employed at full power with 1 Ohm stereo or 2 Ohm bridged loads.

Technical features

Inputs panel with

multichannel

extensions:

HL12 - BH12 - LM24

HL24 - BSA1

VRx2.150

- 42 -

GENERAL RECOMMENDATIONS

Audison would like to thank you for choosing this product. Before the information relative to its use, please carefully read the safety norms you have to respect in order to avoid unpleasant inconveniences and to get the best enjoyment.

WARNING!

• Do not remove the cover in order to reduce the risk of serious technical inconveniences.

• Please apply to qualified staff for every necessary intervention inside the amplifier.

• For safe driving, we advise to listen to music at a volume level which won’t draw external traffic sounds.

WARNINGS

INPUTS: If the source does not share the output ground with the chassis and if you hear parasite noise, the braided shield of the shielded cable has to be connected to the source chassis. OUTPUTS: Never connect –R and –L outputs to ground or to each other. If a crossover filter is used, be sure its two channels do not have a common ground. ADJUSTMENTS: Please act as follows in order to calibrate the amplifiers level in the right way:

- Select the most suitable sensitivity range (0.15÷1.5V or 0.5÷5.0V) to the source you want to use through the proper switch.

- Turn the amplifiers level controls towards minimum sensitivity (range ref.: 2).

- Put the source volume control around 3/4 of maximum level and start a very dynamic musical track.

- Turn the amplifiers level controls towards maximum sensitivity (range ref: 10) in order to cause the intermittent lighting of the proper saturation leds (peak). In multichannel amplification, levels adjustment must be optimised in order to get the maximum balance between the different ways of the system.

PRECAUTIONS

WARNING!

This amplifier must be exclusively used into vehicles and boats with 12 Volt power supply in direct current (12V d.c.), with negative to ground. It is IMPORTANT NOT TO USE any other kinds of electric power supply in order to avoid fires or possible electrocutions.

Do not use VRx if temperature is below

0˚C (32˚F) or above 55˚C (131˚F).

Do not use VRx in case of extreme humidity

conditions (<10% or >90%).

Do not make VRx touch liquids.

- 28 -

Do not put heavy objects onto VRx.

Do not cover VRx heat sink and do not

obstruct its cooling ducts.

Avoid to install VRx in dusty or dirty places.

VRx2.150 VRx2.250 VRX2.400

2000

EDITION

- 41 -

CABLES SIZE

Power supply cables

Power supply cables size is very important since quality of the amplifier performances, reliability and, above all, installation safety depend on it. As this matter is complex, varied and important, we recommend you to address audison’s specialised centres, where highly qualified professionals will be able to carry out these operations in the best way, realising a state-of-the-art installation.

Signal cables

Used signal cables must be of the highest quality in order to allow music perfect reproduction preserving it from disturbances or dispersion. VRx amplifiers perform at their best when they are used in balanced configuration, which minimises the problems due to disturbances and noise. audison cable catalogue makes the exclusive ABS connections system available in order to realise it. It is also possible to opt for an unbalanced connection system; you can choose among a wide variety of good quality models in audison cable catalogue to make it.

audison cable ABS connections (international patent) solve the problems relative to the big size of connectors normally used for balanced configuration in an extremely reliable, elegant and practical way. Their compatibility with standard RCA connectors allows the user to act freely during the installation. 24K gold-plated and mechanically refined, they are a reference for really hi-end systems.

Speaker cables

Speaker cables section will have to be as big as possible and anyway not lower than 2.1mm2(14 AWG) in order to obtain:

• excellent damping on the speaker;

• wide safety margin;

• very good transfer of musical signal. audison cable catalogue includes a wide choice of models which can satisfy all needs. We recommend you to apply to audison’s specialised centres where highly qualified professionals will be able to carry out these operations in the best way, realising a state-of-the-art installation.

- 29 -

EXTERNAL FUSE SIZE AND LOCATION

External fuse size must be calculated according to the type of system you want to realise and to its being made of a single amplifier or multiamplified.

System with a single amplifier

In case of a system with a single amplifier, please refer to item: “Absorbed current at maximum musical power”, written in the Technical Features of the used amplifier, in order to calculate the external fuse value.

In a hypothetical system with a single amplifier (VRx2.400), the external fuse (Audison Cable MAINFUSE) value for a 2 Ohm load would be 70A, rounding off what written in the Technical Features (65A).

Note: Values and models of the example are purely indicative and only used to explain the calculation procedure.

We recommend to use Audison Cable MAINFUSE devices as fuse holder.

Multiamplified system

In case of a multiamplified system, you have to sum the absorption of every used amplifier according to the applied load in order to get the external fuse value.

In a hypothetical system consisting of three amplifiers (VRx2.150 – VRx2.250 – VRx1.500), the external fuse value would be thus defined by the sum:

14A (VRx2.150 on 4Ω load, see Technical Features) 36A (VRx2.250 on 2Ω load) (14+36+149)A= 199A 200A

149A (VRX1.500 on 1Ω load)

Note: Values and models of the example are purely indicative and only used to explain the calculation procedure.

We recommend to use Audison Cable MAINSPLIT as splitter (power distribution block), which contains proper locations for further fuses. Obviously, the size of the latter will have to be defined according to the single amplifier absorption, depending on applied load. We recommend to use Audison Cable MAINFUSE devices as fuse holder.

- 30 -

VRx1.500 connections

Inputs and outputs:

double voice coil speaker with voice

coils in parallel

Power supply, remote and accessories

Inputs and outputs:

one or two speakers in parallel

- 39 -

Please see “Technical Features” and “External fuse size and location” in order to choose the proper external fuse.

WARNING

When VRx1.500 is used with low

impedance loads (1 Ohm), it supplies

2000W approx. and absorbs high currents

(300 A approx. in impulsive functioning). In

order to get the best performances by the system and the car safety, it is necessary

to carefully choose the right size of power

supply and speaker cables, fuse and fuse

holder, battery and power supply

distribution systems. Connections safety

must be also carefully checked in order to

avoid voltage drops implying overheating.

INTERNAL FUSE REPLACEMENT

1 – Remove the transparent cover which protects fuse holder location.

WARNING!

Before installing a new fuse, please remember to charge the external capacitor (if it is installed) through the special charge-discharge device supplied with Audison Cable Superfarad models. This procedure will prevent all current destined to the external capacitor from passing through the new fuse instantaneously, causing dangerous sparks.

2 – Remove the screws which fasten the fuse. Pay attention not to throw the interrupted fuse residuals inside the device.

5 – Close the location through the transparent cover.

3 – Check the value of the fuse you have to insert

(refer to the value indicated in the fuse location if it is used with not particularly difficult loads).

4 – Insert and fix the new fuse by fastening the two screws gradually and alternately, in order to avoid voltage drops along the line and to make the device perfect functioning easier.

- 31 -- 38 -

WHERE TO PUT MODULAR EXTENSIONS

SM24

CONTROL

EXTENSIONS

TPC VRx1 power

supply controller. It mustn’t be removed.

Socket for:

- VCA1D, given with VCRDK

CONTROL

EXTENSIONS

VCA

TFC

(supplied with MAC2)

CONTROL

EXTENSIONS

HL12 - LM24 HL24 - BSA1

MULTICHANNEL

EXTENSIONS

PRM3

CONTROL

EXTENSIONS

DHF VRx1 driver stage.

It must not be removed.

PC36

CONTROL

EXTENSIONS

DMRX socket for a

future extension. Do not put any modules into it.

VRX1C VRx1 controls. They must not be removed.

VRx1.500

Controls under

wooden strip

DSC1

CONTROL

EXTENSIONS

BYP08 bridge: 4+4 Pins

Modular Extensions

Serial modules

BYP12 bridge: 6+6 Pins

- 32 -

VRx size

TRM4 TRM6

RC08 RC10 RC12

420 320 370 420 475 560

383 283 333 383 438 523

39,5 59,5

22 42

62 82 102

Short guide under wooden strip

- 37 -

It shows outputs configurations and controls meaning

VRx1.500

2000

EDITION

- 33 -

Controls and functions

VRx1.500

ON - Green led

It indicates the amplifier is on.

SAFETY - Red led

PEAK - Orange led

It is on when VRx amplifier is about to reach distortion threshold. It is useful to adjust inputs sensitivity.

K1 - Bal/Unbal inputs switch.

K2 - LNS circuit ON/OFF switch for line noise

suppression.

K3 - It selects sensitivity range.

LM - Amplifier input sensitivity adjustment.

Note: In case of installations with more amplifiers connected in cascade, we recommend to put K2 onto ON in the first device (i.e. the one which receives the

signal from the head unit), leaving it onto OFF in the others. If disturbance persists, you can activate LNS anti-noise circuit also in the other amplifiers.

- 36 -

Controls under

wooden strip

Short guide

Controls description

Leds

Technical features

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ÷ 15 VDC

IDLING CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.8 A

IDLING CURRENT WHEN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 0.04 mA

CONTINUOUS NOMINAL POWER Tol.: (+10%/-5%); 0.3% THD; 12 VDC

1 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 12,6 VDC

1 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .560 W (RMS)

CONTINUOUS POWER Tol.: (+10%/-5%); 1% THD; 13,8 VDC

1 ch on 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .560 W (RMS)

1 ch on 2 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1080 W (RMS)

1 ch on 1 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2000 W (RMS)

THD DISTORTION (1 kHz; 90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.01 %

IMD DISTORTION (90% Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.05 %

BANDWIDTH (-3dB; Nominal Power) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Hz ÷ 50 kHz

S/N RATIO (A weighed - 1 VRMS input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 dBA

REMOTE IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 ÷ 15 VDC

REMOTE OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VDC - 150 mA

INPUT SENSITIVITY (high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.15 ÷ 1.5 VRMS

INPUT SENSITIVITY (low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.50 ÷ 5.0 VRMS

INPUT IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 kOhms

LOAD IMPEDANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 4 - 2 - 1 Ohm

SIZE (W x H x D) mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 x 64 x 432

SIZE (W x H x D) inches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.4 x 2.5 x 17

INTERNAL FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150A

ABSORBED CURRENT AT MAXIMUM MUSICAL POWER - EXTERNAL FUSE CHOICE

13,8V - 4 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 A

13,8V - 2 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68 A

13,8V - 1 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149 A

Please always choose a fuse of equal or slightly higher value (max 10%) than indicated.

Note:

The use of MAC2 cooling system is strongly recommended when the amplifier is employed at full power with 2 Ohm or 1 Ohm loads.

Inputs panel with

multichannel

extensions:

HL12 - LM24

HL24 - BSA1

- 34 -

VRx1.500

- 35 -

Block diagram

VRx1.500

Optional modules

AUDISON VRx 4.300EX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual