Rockford Fosgate 500.2 User Manual

power

500.2

® ®

new

chrome

heatsink

car audio

for

fanatics

competition Power amplifier
Operation & Installation

®

punch

Dear Customer,

Congratulations on your purchase of the world's finest brand of car audio amplifiers. At Rockford Fosgate we
are fanatics about musical reproduction at its best, and we are pleased you chose our product. Through years
of engineering expertise, hand craftsmanship and critical testing procedures, we have created a wide range of
products that reproduce music with all the clarity and richness you deserve.

For maximum performance we recommend you have your new Rockford Fosgate product installed by an
Authorized Rockford Fosgate Dealer, as we provide specialized training through Rockford Technical Training
Institute (RTTI). Please read your warranty and retain your receipt and original carton for possible future use.

Great product and competent installations are only a piece of the puzzle when it comes to your system. Make
sure that your installer is using 100% authentic installation accessories from Connecting Punch in your
installation. Connecting Punch has everything from RCA cables and speaker wire to Power line and battery
connectors. Insist on it! After all, your new system deserves nothing but the best.

To add the finishing touch to your new fanatic image order your Rockford Fosgate wearables, which include
everything from T-shirts and jackets to hats and sunglasses.

To get a free brochure on Rockford Fosgate products and Rockford wearables, please call 602-967-3565 or FAX
602-967-8132. For International orders, FAX [phone] or call +001-1-602-967-3565.

PRACTICE SAFE SOUND™

CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER 100dB MAY CAUSE PERMANENT

HEARING
WELL

If, after reading your manual, you still have questions regarding this product, we recommend that you see your Rockford Fosgate
dealer. If you need further assistance, you can call us direct at 1-800-669-9899. Be sure to have your serial number, model number
and date of purchase available when you call.

The serial number can be found on the outside of the box. Please record it in the space provided below as your permanent record.
This will serve as verification of your factory warranty and may become useful in recovering your amplifier if it is ever stolen.

LOSS. HIGH POWERED AUTOSOUND SYSTEMS MAY PRODUCE SOUND PRESSURE LEVELS

OVER 130dB. USE COMMON SENSE AND PRACTICE SAFE SOUND.

Serial Number:_____________________________________________

Model Number: ____________________________________________

T

ABLE OF

C

ONTENTS

Introduction.................................................................................................................................................................1

Accessory Pack ...........................................................................................................................................................1

Technical Design Features.............................................................................................................................................2

Design Features ...........................................................................................................................................................5

Installation Considerations ............................................................................................................................................7

Mounting Locations......................................................................................................................................................8

Battery and Charging ...................................................................................................................................................8

Wiring the System........................................................................................................................................................9

Using Passive Crossovers............................................................................................................................................10

Table of Crossover Components...................................................................................................................................11

Using the XCard.........................................................................................................................................................12

Customizing the XCard ...............................................................................................................................................12

XCard Resistor Chart...................................................................................................................................................13

XCard Configurations..................................................................................................................................................14

Installation ................................................................................................................................................................16

Using the Balanced Line Inputs....................................................................................................................................19

Rockford Fosgate Accessories ......................................................................................................................................21

Troubleshooting.........................................................................................................................................................23

Autosound 2000’s Quick Check for Troubleshooting.......................................................................................................25

Dynamic Power Measurements....................................................................................................................................27

500.2 Specifications ..................................................................................................................................................28

Warranty Information .................................................................................................................................................29

International Information.............................................................................................................................................30

G

ETTING

S

TARTED

Welcome to Rockford Fosgate! This manual is designed to provide information for the owner, salesperson and installer. For
those of you who want quick information on how to install this product please turn to the

Installation

section of this manual
or refer to the icons listed below. Other information can be located by using the Table of Contents. We, at Rockford Fosgate,
have worked very hard to make sure all the information in this manual is current. But, as we are constantly finding new ways
to improve our product, this information is subject to change without notice.

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Sections marked

ADVANCED
OPERATION

include in-depth

technical information

include “slam dunk”

® ®

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Sections marked

INSTALLATION

wiring connections

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Sections marked

TROUBLESHOOTING

include recommendations

for curing installation

problems

INTRODUCTION

The Punch Power series of amplifiers represent the best Rockford Fosgate has to offer! Our engineers devised technical
features which would be considered overkill by other audio manufacturers, but not at Rockford Fosgate! Trans•nova,
DIAMOND, and TOPAZ, exclusively designed by Rockford, are just a few of these features which are described in the Technical
Design Features section of this manual.

ACCESSORY PACK

The accessory pack includes the mounting hardware necessary to secure the amplifier to the vehicle and to attach the end
caps to the amplifier.

Punch Power 500.2

Installation & Operation Manual
Punch Verification Certificate
(4) Amplifier mounting screws (#8 x 3⁄4" phillips)
(4) Speaker connector screws (3/32" allen)
(2) Power connector screws (1/8" allen)
(4) End cap mounting screws (9/64" allen)
(1) Allen wrench 3/32" (speaker)
(1) Allen wrench 9/64" (end cap)
(1) Allen wrench 1/8" (power)

– 1 –

T

ECHNICAL

◆ trans•nova (TRANSconductance NOdal Voltage Amplifier)

D

ESIGN

F

EATURES

The trans•
the audio signal to pass through the amplifier at
supply and is configured to increase power gain. The increase in power gain allows the drive stage to operate at a lower
voltage. A low voltage drive stage is the same principle used in high quality preamplifiers to produce high linearity and wide
bandwidth.

The resulting design utilizes an output stage with a simpler gain structure and a shorter total signal path than conventional
high voltage (bi-polar) designs. The number of stages is reduced from five or more to three. The output stage is further refined
into a trans-impedance stage (current to voltage converter) to achieve a short loop (fast) negative feedback. The output stage
is driven cooperatively by a transconductance stage (voltage to current converter).

THE RESULT: Superior sound quality, greater efficiency and higher reliability.

nova

(TRANS conductance NOdal Voltage Amplifier) is a patented circuit (U.S. Patent 4,467,288) that allows

low voltage

E-I I-E

trans•nova circuitry

. Each amplifier channel utilizes its own “fully floating” power

◆ DIAMOND (Dynamically Invariant AMplification Optimized Nodal Drive)

DIAMOND

design which reduces high frequency distortion. Amplifiers which utilize a large array of output MOSFETs cause a high
capacitive load on the driver stage. This load can make the high frequencies sound harsh. The DIAMOND circuit eliminates
high frequency distortion by allowing the driver to operate with 20dB or more of current headroom, whereas traditional drivers
have only 6dB of current headroom.

THE RESULT: Lower distortion and greater inherent stability.

(Dynamically Invariant AMplificiation Optimized Nodal Drive - patent pending) is an important advance in circuit

◆ MEHSA (Maximum Efficiency Heat Sink Application)

The

MEHSA

than traditional FET mounting techniques using the exact same components. A multi-layer insulated metal substrate
operating with minimal thermal resistance spreads heat both downward & outward to quickly dissipate heat from each device
across the heat sink. This process combined with our DSM technology and MOSFET devices allow us to squeeze more watts
per cubic inch from every output device as well as provide consistent thermal stability.

THE RESULT: Optimized power output, enhanced thermal stability, and maximum component reliability.

(Maximum Efficiency Heat-Sink Application) is a proprietary process that yields up to 5 times better heat transfer

– 2 –

◆ TOPAZ (Tracking Operation Pre-Amplifier Zone)

The

TOPAZ

(Tracking Operation Pre-Amplifier Zone) circuitry solves ground loop noise problems common to automotive
amplifier design. This innovative new development allows vastly improved isolation of the input signal grounds from the
power supply ground of the amplifier. This is accomplished by allowing the source unit to control the potential “environment”
of the entire input structure or “zone” of the amplifier. This process improves the noise rejection of the amplifier by 30-40dB
– an astounding 20-100 times better than amplifiers without TOPAZ.

THE RESULT: Elimination of troublesome ground loop noise between source and amplifier.

◆ DSM (Discrete Surface Mount Technology)

The

DSM

(Discrete Surface Mount) manufacturing process combines the advantages of both discrete components and
integrated circuitry. Rockford Fosgate is the only American amplifier manufacturer to have invested millions into this process.
DSM components differ from conventional discrete components in different ways. They are more compact, more rugged,
and they efficiently dissipate generated heat. Using them wherever appropriate allows the advantages associated with
discrete circuitry to be retained while also providing room for both highly advanced processing features and generous PC
board copper paths where needed. Their short lead-out structures allow maximum audio performance and highest signal­to-noise ratios to be obtained in amplifiers of desirable package size without resorting to “amplifier-on-a-chip” shortcuts. These
advantages are shown below in Figure 1.

Solder

Component

Solder

PC Board

Figure 1

PC Board

Thru-Hole Surface Mount

THE RESULT: Less connections, improved reliability, shorter signal paths, superior signal-to-noise ratio and awesome sonic
performance.

◆ XCard (Internal Crossover)

The Power amplifiers utilize internal active crossovers. These crossovers have many performance advantages such as using
discrete components for exact frequency adjustments which are far superior to potentiometers. Additionally, the
be configured for high-pass, low-pass and full range operation. With slight modification, many crossover frequencies and
slope configurations can be achieved.

THE RESULT: Increased system design flexibility with a precise electronic crossover without the limitations of conventional
potentiometer designs.

XCard

can

◆ Stereo Pass-Thru

The

Pass-Thru

cables or “Y” adapters. The original signal(s) fed into the input jack(s) are looped back to the Pass-Thru outputs allowing
less signal cable to be used. This results in cleaner system designs and reduces noise pick-up.

THE RESULT: Convenient signal level output for adding extra amplifiers.

output provides a convenient source for daisy-chaining an additional amplifier without the need for extra RCA

– 3 –

◆ Bass EQ

The

Bass EQ

helps correct for acoustical deficiencies in the listening environment. A unique potentiometer that controls bass
compensates for the lack of low frequencies present in most car environments. Unlike a conventional tone control, the Bass
EQ corrects for the specific problem of poor low bass response.

THE RESULT: Provides better low bass response.

◆ Balanced Line Inputs

Using the Balanced Line Inputs provides the last word in achiev­able rejection of noise induced in the cable between the source
and the amplifier. The differential input circuitry (Figure 2) used

Figure 2

Center

Conductor

RCA Input

Differential

Input

in the balanced input system rejects whatever signals are
common to both of the shielded, twisted-pair conductors. Bal­anced line is universal in concert installations where the stage
and mixing consoles are hundreds of feet apart. Long signal
cables and electrically-noisy environments make signal integrity

Outer

Shield

Differential inputs only amplify the difference between two conductors.
Note: the noise spikes appear on both the center conductor and the outer
shield and therefore are not amplified.

and noise rejection an extremely difficult challenge.
THE RESULT: Quiet transmission of audio from source to amplifier.

◆ NOMAD (NOn-Multiplying Advanced Decision)

The Power amplifiers use an
conditions. The innovative
technique ever used, bringing previously unavailable levels of accuracy, stability, temperature immunity and reliability to
this critical process. NOMAD makes advanced decisions based on device voltages to precisely control the awesome levels
of current available in the output MOSFETs to safe values – but only when absolutely needed.

THE RESULT: Extremely fast protection system that always protects the amplifier and never degrades the sound.

analog computer process

NOMAD

(NOn-Multiplying Advanced Decision) system is the most sophisticated version of this

to absolutely maximize safe output power under all operating

◆ MOSFET Devices (Metal Oxide Semiconductor Field Effect Transistor)

Rockford Fosgate is one of the few manufacturers in any of the sound communities to utilize MOSFET devices in both the

supply

and the

output stages. MOSFET

(Metal Oxide Semiconductor Field Effect Transistor) devices offer several important
inherent advantages over the 30 year old technology of bi-polar design. These advantages include: thermal stability,
switching speed, ultra low output impedance and wider bandwidth linearity. In addition, MOSFET and vacuum tubes share
many important operating characteristics. However, the MOSFET device is much faster, wider in bandwidth, measurably
lower in distortion and far more linear than vacuum tubes.

THE RESULT: Operational characteristics of vacuum tubes without the performance limitations of tube design.

– 4 –

power

D

ESIGN

1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power amplifier dissipates heat

2. End Caps – The unique end caps conceal the wiring and input cables, giving the amplifier a clean “stealth” look.

F

EATURES

generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over
conventional extrusion heatsink designs.

3 13 8

L

Speaker

Gain

+ L –

Phase

0 – 180

°

Balanced

10

LED

REM GNDB+

15

5

Bass

EQ

Unbalanced

11

(Mono)

L

L

Pass Thru

9

6

7

R

Balanced

Input

R

Pass Thru

4 4

EZ Bridged

10

Gain

180°- 0

312

R

Speaker

– R +

°

3. Speaker Terminals – The heavy duty, gold-plated terminal block connectors (+ and –) will accept wire sizes from
8 AWG to 18 AWG. These gold-plated connectors are immune to corrosion that can cause signal deterioration.

4. Power Terminals – The heavy duty, gold-plated power and ground connectors will accommodate 4 AWG wire for
maximum input current capability.

5. REM Terminal – This gold-plated spade terminal is used for the AP (auto power) or remote turn on of the amplifier.

6. RCA Input Jacks – The industry standard RCA jack provides an easy connection for signal level input. They are gold-

plated to resist the signal degradation caused by corrosion.

7. Balanced Line Input– This input will allow the Balanced Line Transmitter (BLT) or any balanced Rockford Fosgate
source unit/signal processor to be used in conjunction with the amplifier to provide better noise rejection.

8. Signal Input Switch – This switch allows selection of either the RCA or Balanced Line inputs.

9. RCA Pass-Thru Jacks – The Pass-Thru provides a convenient source for daisychaining an additional amplifier,

eliminating the need for “Y” adapters. The original signal(s) fed into input jack(s) are looped back to the Pass-Thru
output(s).

10. Input Sensitivity Controls – The input level controls are preset to match the output of most source units. They can
be adjusted to match output levels from a variety of source units.

– 5 –

11. Bass EQ Control – The Bass EQ allows a narrow band adjustment of up to +18dB centered at 45Hz. The bass boost can

14

ROCKFORD CORPORATION

MADE IN THE USA

®

®

500 Watts RMS continuous power per

channel into 2 Ohms with less than 0.10%

Total Harmonic Distortion from 20-20kHz

AMPLIFIER

250 Watts RMS continuous power per

channel into 4 Ohms with less than 0.05%

Total Harmonic Distortion from 20-20kHz

High-Pass

HP

LP

HP

LP

Low-Pass

FULL

Full Range

NOTE: Insert XCards into
sockets facing each other.

Please refer to Owner’s manual
for possible Input, Output, and

XCard configurations.

For Bridged Mono Wiring

Connect 4Ω mono woofer + to L+ of

amplifier and mono woofer – to R–

of amplifier. Amplifier will operate

mono/stereo simultaneously.

Do Not Chassis

Ground Any Speaker.

+

–

L+ R–

XCard 1

XCard 2

be bypassed by turning the control to its minimum or counterclockwise position.

12. E-Z Bridge Switch / 0°-180° Phase Switch – This dual purpose switch enables you to E-Z bridge the amplifier or invert

the signal phase of the right channel.

13. Phase Switch – This switch enables you to easily invert the phase of the left channel without having to disconnect the
speaker wires.

14. Internal Crossovers – These built-in crossover cards are configurable for a multitude of operating frequencies. The
orientation of the card in its socket determines its function of high-pass, low-pass or full range operation.

15. LED Power Indicator – The LED gives a visual indication of the status of the amplifier, lighting when the unit is turned on.

– 6 –

I

NSTALLATION

Tools Needed

The following is a list of tools you will need for installing the Punch Power amplifier:

Allen wrenches 9/64" , 3/32" & 1/8" (included) Wire Cutters
Wire strippers Voltmeter
Battery post wrench Wire crimpers
Electric hand drill and assorted bits Assorted connectors

This section focuses on some of the vehicle considerations for installing your new Punch amplifier. Checking your battery
and present sound system, as well as pre-planning your system layout and best wiring routes will save installation time.
When deciding on the layout of your new system, be sure that each component will be easily accessible for making
adjustments.

Before beginning any installation, be sure to follow these simple rules:

1. Carefully read and understand the instructions before attempting to install the amplifier.

2. For safety, disconnect the negative lead from the battery prior to beginning the installation.

3. For easier assembly, we suggest you run all wires prior to mounting your amplifier in place.

C

ONSIDERATIONS

4. Route all of the RCA cables close together and away from any high current wires.

5. Use high quality Connecting Punch accessories for a reliable installation and to minimize signal or power loss.

6. Think before you drill! Be careful not to cut or drill into gas tanks, fuel lines, brake or hydraulic lines, vacuum
lines or electrical wiring when working on any vehicle.

7. Never run wires underneath the vehicle. Running the wires inside the vehicle provides for best protection.

8. Avoid running wires over or through sharp edges. Use rubber or plastic grommets to protect any wires routed
through metal, especially the firewall.

9. ALWAYS protect the battery and electrical system from damage with proper fusing. Install a fuseholder and fuse
on the +12V power wire within 18" (45.7cm) of the battery terminal.

10. When grounding to the chassis of the vehicle, scrape all paint from the metal to ensure a good, clean ground
connection. Grounding connections should be as short as possible and always be connected to metal that is
welded to the main body, or chassis, of the vehicle.

– 7 –

M

OUNTING

The mounting location and position of your amplifier will have a great effect on its ability to dissipate the heat generated
under normal operation. The design of our cast aluminum heatsink serves to easily dissipate the heat generated over a wide
range of operating conditions. However, to maximize the performance of your amplifier, care should be taken to ensure
adequate ventilation.

Trunk Mounting

Mounting the amplifier vertically on a surface with the fin grooves running up and down will provide the best cooling of the
amplifier.

Mounting the amplifier on the floor of the trunk will work but provides less cooling capability than vertical mounting.

Mounting the amplifier upside down to the rear deck of the trunk will not provide proper cooling and will severely affect the
performance of the amplifier and is strongly

Passenger Compartment Mounting

Mounting the amplifier in the passenger compartment will work as long as you provide a sufficient amount of air for the
amplifier to cool itself. If you are going to mount the amplifier under the seat of the vehicle, you must have at least 1"
(2.54cm) of air gap around the amplifier's heatsink.

L

OCATIONS

not

recommended.

Mounting the amplifier with less than 1" (2.54cm) of air gap around the heatsink in the passenger compartment will not
provide proper cooling and will severely affect the performance of the amplifier and is strongly

Engine Compartment Mounting

Rockford Fosgate amplifiers should
but could create an embarrassing situation caused by the ridicule from your friends.

B

ATTERY AND

Amplifiers will put an increased load on the vehicle's battery and charging system. We recommend checking your alternator
and battery condition to ensure that the electrical system has enough capacity to handle the increased load of your stereo
system.

NOTE: This amplifier utilizes a large array of power supply capacitance and can draw substantial current at turn-on.
The dashboard BATTERY VOLTAGE and/or ALTERNATOR CHARGE lamp may illuminate for a brief period while
momentarily recharging the capacitor bank. This may be most noticeable when the amplifier is off for at least a day
or two and is considered normal operation.

never

C

HARGING

not

recommended.

be mounted in the engine compartment. Not only will this void your warranty

– 8 –

W

IRING

T

HE

S

YSTEM

CAUTION: Avoid running power wires near the low level input cables, antenna, power leads, sensitive equipment or
harnesses. The power wires carry substantial current and could induce noise into the audio system.

1. Configure the internal XCard crossovers prior to installation. Refer to the XCard Configurations on pages 14 & 15 for
further information.

2. Plan the wire routing. Take care when running signal level RCA cables to keep them close together but isolated from
the amplifier's power cables and any high power auto accessories, especially electric motors. This is done to prevent
coupling the noise from radiated electrical fields into the audio signal. When feeding the wires through the firewall or
any metal barrier, protect them with plastic or rubber grommets to prevent short circuits. Leave the wires long at this
point to adjust for a precise fit at a later time.

3. Prepare the Power cable for attachment to the amplifier by stripping 5/8"
of insulation from the end of the wire. The use of 4 gauge power cable can
interfere with the installation of the end caps. Proper wire dress can prevent
this from occurring. To prevent the wire from fraying, strip the insulation at
a 45° angle. Insert the bared wire into the B+ terminal with the long side
of the insulation on the top. Bend the cable down at a 90° angle. Tighten
the set screw to secure the cable in place.

cables for power and for ground. This will give you the best performance
possible.

4. Strip 3/8" from the battery end of the power cable and crimp a large ring terminal to the cable. Use the ring terminal
to connect to the battery positive terminal. Do not install the fuse at this time.

5. Prepare a length of cable to be used for the ground connection. Strip 5/8" of insulation from the end of the cable as
described above and connect to the ground terminal of the amplifier. Prepare the chassis ground by scraping any paint
from the metal surface and thoroughly clean the area of all dirt and grease. Strip the other end of the cable and attach
a ring connector. Fasten the cable to the chassis using a non-anodized screw and a star washer.

6. Prepare the REM turn-on wire for connection to the amplifier by stripping 1/4" of insulation from the wire end and
crimping an insulated spade connector in place. Slide the connector over the REM terminal on the amplifier. Connect
the other end of the REM wire to a switched 12 volt positive source. The switched signal is usually taken from the source
unit's auto antenna or the accessory lead. If the source unit does not have these outputs available, the recommended
solution is to wire a mechanical switch in line with a 12 volt source to activate the amplifier.

We recommend using 4 gauge

STRIP WIRE

AMP

>

><

5/8"

>

INSULATION

>

7. Securely mount the amplifier (with supplied screws) to the vehicle or amp rack. Be careful not to mount the amplifier
on cardboard or plastic panels. Doing so may enable the screws to pull out from the panel due to road vibrations or
sudden vehicle stops.

8. Connect the source signal to the amplifier by plugging the RCA cables into the input jack(s) at the amplifier. If using
Balanced Line Inputs, refer to pages 19 & 20.

9. Connect the speakers. Strip the speaker wires 5/8" and insert into the appropriate terminal on the amplifier. Insert the
bared wire into the speaker terminal and tighten the set screw to secure into place. Be sure to maintain proper speaker
polarity.

10. Perform a final check of the completed system wiring to ensure that all connections are accurate. Check all power and
ground connections for frayed wires and loose connections which could cause problems from road vibrations.

DO NOT chassis ground any of the speaker leads as unstable operation may result.

– 9 –

11. After the final inspection is complete, install the power fuse and enjoy listening. During the initial listening period, you
may need to “fine tune” any phasing and level settings within your particular vehicle. To aid in this procedure, play a
track with high musical content and cruise around your neighborhood. After fully evaluating the transient response of
your system and making any final adjustments, all your neighbors within a 1 mile radius will assume that you have
just successfully completed another upgrade to your audio system for which they will probably spill thumbtacks on your
driveway.

NOTICE!

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SING

Amplifiers using the trans•

nova

topology improve in sound quality after
warming up. We recommend operating the amplifier for approximately 15
minutes prior to evaluation under judging criteria or tune-ups to establish its
normal operating temperature.

* Your friends will call it MAGIC, you can call it Rockford technology! *

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ROSSOVERS

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A passive crossover is a circuit that uses capacitors and/or coils and is placed on speaker leads between the amplifier and
speaker. The crossover delegates a specific range of frequencies to the speaker for optimum driver performance. A crossover
network can perform one of three functions: High-Pass (capacitors), Low-Pass (inductors or coils) and Bandpass
(combination of capacitor and coil).

The most commonly used passive crossover networks are 6dB/octave systems. These are easy to construct and require one
component per filter. Placing this filter in series with the circuit will reduce power to the speaker by 6dB/octave above or
below the crossover point depending on whether it is a high-pass or low-pass filter. More complex systems such as 12dB/
octave or 18dB/octave can cause impedance problems if not professionally designed.

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Passive crossovers are directly dependent upon the speaker's impedance and component value for accuracy. When passive
crossover components are used in multiple speaker systems, the crossover's effect on the overall impedance should be taken
into consideration along with the speaker's impedance when determining amplifier loads.

– 10 –

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L

6dB/Octave Low-Pass

Freq.
(Hertz)

80 4.1mH 1000µF 8.2mH 500µF 16mH 250µF
100 3.1mH 800µF 6.2mH 400µF 12mH 200µF
130 2.4mH 600µF 4.7mH 300µF 10mH 150µF

200 1.6mH 400µF 3.3mH 200µF 6.8mH 100µF
260 1.2mH 300µF 2.4mH 150µF 4.7mH 75µF
400 .8mH 200µF 1.6mH 100µF 3.3mH 50µF

600 .5mH 136µF 1.0mH 68µF 2.0mH 33µF
800 .41mH 100µF .82mH 50µF 1.6mH 26µF

1000 .31mH 78µF .62mH 39µF 1.2mH 20µF

1200 .25mH 66µF .51mH 33µF 1.0mH 16µF
1800 .16mH 44µF .33mH 22µF .68mH 10µF
4000 .08mH 20µF .16mH 10µF .33mH 5µF

2 OHMS

L

C L

Speaker Impedance

6dB/Octave High-Pass

4 OHMS

C

C

8 OHMS

L C

6000 51µH14µF .10mH 6.8µF .20mH 3.3µF
9000 34µH 9.5µF68µH 4.7µF .15mH 2.2µF

12000 25µH 6.6µF51µH 3.3µF 100µH 1.6µF

6 dB/Octave High-Pass and Low-Pass Filters

L = Low-Pass (Inductor)
C = High-Pass (Capacitor)

For more information, see your Authorized Rockford Fosgate Dealer.

– 11 –

U

SING THE

The crossover functions are controlled through the use of an XCard and can be set for high-pass, low-pass or full range
operation. The XCard shipped with your amplifier is set for Full Range. Each crossover card has two faces: one face operates
Full Range, the other has arrows to indicate the edge for selecting HP (high-pass) or LP (low-pass) operation. Orient the
card with the desired operating edge, indicated by the arrow, toward the socket terminals inside the amplifier. Firmly, but
carefully, plug the card into the socket.

XC

ARD

Low-Pass Full RangeHigh-Pass

C

USTOMIZING THE

The crossover point can be altered by changing the 4 resistor values. Use the following formula to select the appropriate
resistor value to be placed on the XCard.

3386

7234

= R (in kΩ) for .047µf cap

f

o

= R (in kΩ) for .022µf cap

f

o

LP

➝

XC

HP

➝

ARD

➝

➝

HP

LP

The actual formula is: R =

Where: R = Ω

fo = desired crossover frequency
c = capacitor in farads
ex: .047 x 10-6 for .047µf cap

FULL

↕

1

2πfoc

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Crossover Card

High Pass

R1

R2

Low Pass
Full Range

R1

FULL

R2

– 12 –

XC

ARD

R

ESISTOR

C

HART

Our tests have shown that using 0.047µf capacitors for frequencies below 100Hz, and 0.022µf capacitors for frequencies
above 100Hz, result in more linear crossover control. Refer to the Specifications page to determine the capacitor value
of each supplied XCard.

a

O
p

d

e

v

r

a

a

n

t

c

i

e

o

d

n

Butterworth Alignment Q = .707
1% resistors used with 0.047µF capacitors

Frequency R1 R2
20Hz 169kΩ 169kΩ
25Hz 133kΩ 133kΩ
30Hz 110kΩ 110kΩ
35Hz 95.3kΩ 95.3kΩ
40Hz 84.5kΩ 84.5kΩ
45Hz 75kΩ 75kΩ
50Hz 68.1kΩ 68.1kΩ
55Hz 61.9kΩ 61.9kΩ
60Hz 56.2kΩ 56.2kΩ
65Hz 52.3kΩ 52.3kΩ
70Hz 48.7kΩ 48.7kΩ
75Hz 45.3kΩ 45.3kΩ
80Hz 42.2kΩ 42.2kΩ
85Hz 40.2kΩ 40.2kΩ
90Hz 37.4kΩ 37.4kΩ

200Hz 16.9kΩ 16.9kΩ
300Hz 11.3kΩ 11.3kΩ
400Hz 8.45kΩ 8.45kΩ
500Hz 6.65kΩ 6.65kΩ
600Hz 5.62kΩ 5.62kΩ
700Hz 4.75kΩ 4.75kΩ
800Hz 4.22kΩ 4.22kΩ
900Hz 3.74kΩ 3.74kΩ

1.0kHz 3.40kΩ 3.40kΩ

1.2kHz 2.80kΩ 2.80kΩ
2kHz 1.69kΩ 1.69kΩ
3kHz 1.10kΩ 1.10kΩ
4kHz 845Ω 845Ω
5kHz 665Ω 665Ω
6kHz 562Ω 562Ω
7kHz 487Ω 487Ω
8kHz 422Ω 422Ω

Butterworth Alignment Q = .707
1% resistors used with 0.022µF capacitors

Frequency R1 R2

20Hz 357kΩ 357kΩ
25Hz 287kΩ 287kΩ
30Hz 237kΩ 237kΩ
35Hz 205kΩ 205kΩ
40Hz 178kΩ 178kΩ
45Hz 162kΩ 162kΩ
50Hz 143kΩ 143kΩ
55Hz 130kΩ 130kΩ
60Hz 121kΩ 121kΩ
65Hz 110kΩ 110kΩ
70Hz 102kΩ 102kΩ
75Hz 95.3kΩ 95.3kΩ
80Hz 90.9kΩ 90.9kΩ
85Hz 84.5kΩ 84.5kΩ
90Hz 80.6kΩ 80.6kΩ

200Hz 35.7kΩ 35.7kΩ
300Hz 23.7kΩ 23.7kΩ
400Hz 17.8kΩ 17.8kΩ
500Hz 14.3kΩ 14.3kΩ
600Hz 12.1kΩ 12.1kΩ
700Hz 10.2kΩ 10.2kΩ
800Hz 9.9kΩ 9.9kΩ
900Hz 86kΩ 86kΩ

1.0kHz 7.15kΩ 7.15kΩ

1.2kHz 6.04kΩ 6.04kΩ

2.0kHz 3.57kΩ 3.57kΩ

3.0kHz 2.37kΩ 2.37kΩ

4.0kHz 1.76kΩ 1.76kΩ

5.0kHz 1.43kΩ 1.43kΩ

6.0kHz 1.21kΩ 1.21kΩ

7.0kHz 10.2kΩ 10.2kΩ

8.0kHz 909Ω 909Ω

– 13 –

XC

ARD

C

ONFIGURATIONS

Bypassing the Crossover

L

Speaker
+ L –

20Hz-20kHz

Full Range

Gain

Phase

0 – 180

°

• XCard 1 inserted as Full Range

• XCard 2 inserted as Full Range

Configuring a 12dB/octave Filter

Bass

EQ

Balanced

Unbalanced

XCard 2

Full

L

(Mono)

Pass Thru

Range

Gain

180°- 0

R

°

20Hz-20kHz

Full Range

Speaker

– R +

R

Balanced

Pass Thru

Input

R

EZ Bridged

Full

Range

XCard 1

L

20Hz-80Hz

12dB/octave LP

• XCard 1 inserted as Full Range

• XCard 2 inserted as HP or LP

Speaker

+ L –

L

Gain

Phase

0 – 180

°

Balanced

Unbalanced

XCard 2

Bass

EQ

L

(Mono)

L

Pass Thru

LP

Pass Thru

R

R

Balanced

Input

Range

EZ Bridged

Full

XCard 1

Gain

180°- 0

R

Speaker
– R +

°

20Hz-80Hz

12dB/octave LP

– 14 –

Configuring a 24dB/octave Filter

L

Speaker

+ L –

20Hz-80Hz

24dB/octave LP

Gain

Phase

0 – 180

Bass

°

Balanced

Unbalanced

EQ

(Mono)

XCard 2

LP

L

L

Pass Thru

Pass Thru

R

R

Balanced

Input

EZ Bridged

LP

XCard 1

Gain

180°- 0

R

– R +

°

20Hz-80Hz

24dB/octave LP

• XCards 1 & 2 inserted identically as HP or LP

NOTE: Both XCards must be customized to the same frequency for proper 24dB/octave operation.

Configuring a 12dB/octave Bandpass Filter

Speaker

L

Speaker

+ L –

80Hz-400Hz

12dB/octave Bandpass

Gain

Phase

0 – 180

Bass

EQ

°

Balanced

Unbalanced

(Mono)

XCard 2

LP

L

L

Pass Thru

Pass Thru

R

R

Balanced

Input

EZ Bridged

HP

R

Gain

180°- 0°

XCard 1

12dB/octave Bandpass

Speaker

– R +

80Hz-400Hz

• XCard 1 inserted as HP

• XCard 2 inserted as LP

NOTE: The amplifier is shipped with 80Hz XCards.x2 At least one of the XCards must be customized to enable proper
bandpass operation. Refer to “Using the XCard” on page 12 for more information or contact your local Authorized
Rockford Fosgate Dealer for customized XCards.

– 15 –

I

NSTALLATION

Power Connections

I

® ®

N
S
T
A
L
L
A
T
I
O
N

LED

Connect to remote

turn-on lead of

source unit.

Less than 18"

(45cm)

NOTE: We recommend using 4 gauge cables
for power and for ground. This will give you
the best performance possible.

REM

B+ GND

+ –

Connect to B+ of battery with a

100 amp or (2) 50 amp fuses

Connect to chassis
ground of vehicle*

*Keep wire as short as possible.

– 16 –

Stereo Operation

RCA

Input

I

® ®

N
S
T
A
L
L
A
T

I
O
N

L

Speaker

Gain

+ L –

0 – 180

–

+

• RCA inputs are connected to both

• Signal Input Switch selected to

• Left Phase Switch set to

• Right Phase Switch set to

• Gain for left and right channels

• Impedance for

• XCard can be

each channel

High-Pass, Low-Pass

0°

0°

operate independently

should be

Stereo/Mono Operation

L

(Mono)

Bass

Phase

°

EQ

Balanced

Unbalanced

L

Pass Thru

2Ω Min. 2Ω Min.

left and right

Unbalanced

for RCA input

2Ω minimum

or

Full Range

R

R

Pass Thru

channels

position

RCA
Input

Balanced

Input

EZ Bridged

Gain

180°- 0°

R

Speaker

– R +

–

+

Speaker
+ L –

°

Bass

EQ

Balanced

Unbalanced

(Mono)

L

L

Gain

Phase

0 – 180

L

Pass Thru

Pass Thru

R

Balanced

Input

R

EZ Bridged

–

Gain

180°- 0

R

°

+

2Ω min. 2Ω min.

+
Speaker
Terminal

+

+–

–

4Ω min.

• RCA inputs are connected to both

• Signal Input Switch selected to

• Left Phase Switch set to

0°

• Right Phase Switch set to

left and right

Unbalanced

180°

for stereo/mono operation

for RCA input

channels

• All speaker polarity on right channel is inverted to correct for signal phase

• Gain for left and right channels set

• Impedance for

• Impedance for

• XCard is in

each channel
bridged channel

Full Range

position

equally

should be

should be

to balance the subwoofer

2Ω minimum

4Ω minimum

• Passive crossovers are needed for proper stereo/mono operation

Speaker
– R +

–

Speaker

Terminal

– 17 –

Bridged Operation

RCA
Input

I

® ®

N
S
T
A
L
L
A
T
I
O
N

Speaker
+ L –

Bass

EQ

Balanced

Unbalanced

L

(Mono)

L

Pass Thru

L

Gain

Phase

°

0 – 180

Pass Thru

R

Balanced

Input

R

EZ Bridged

+

Speaker

Terminal

+–

4Ω min.

• RCA inputs are connected to both

• Signal Input Switch selected to

• Left Phase Switch set to

0°

• Right Phase Switch set to

180°

left and right

Unbalanced

channels

for RCA input

• Inverting the right signal will allow the bridged woofer to operate correctly

• Gain for left and right channels

• Impedance for

• XCard is in

bridged channel

High-Pass, Low-Pass

EZ-Bridged Operation

set equally

should be

or

Full Range

to balance the subwoofer

4Ω minimum

position

Mono

Input

Gain

180°- 0

R

Speaker

– R +

°

–

Speaker

Terminal

Speaker
+ L –

L

Gain

Phase

0 – 180

°

Bass

EQ

Balanced

Unbalanced

(Mono)

L

L

Pass Thru

+

Speaker

Terminal

+–

4Ω min.

• RCA input is connected to

• Signal Input Switch to

• Left Phase Switch at

• Right Phase Switch set to

L (Mono)

Unbalanced

0°

E-Z Bridge

input

for RCA input

for the following to occur:

L (Mono) RCA input to drive both the left and right channels
Left Gain will control both the left and right channels
Right Phase will be inverted

180°

which will allow the bridged woofer to operate

correctly

• Impedance for

• XCard is in the

bridged channel

should be

High-Pass, Low-Pass

4Ω minimum

or

Full Range

Pass Thru

R

Balanced

Input

R

position

EZ Bridged

Gain

180°- 0

R

Speaker

– R +

°

–

Speaker

Terminal

– 18 –

U

SING THE

The Balanced Line Inputs can be utilized with the optional Balanced Line Transmitter. Unlike standard RCA cables that use
two wires to carry the audio signal and ground, balanced lines use three. In a balanced line, the output signal and its inverted
replica travel down a pair of wires where the ground connects via the shield. As the amplifier receives the signals, it cancels
out whatever signals are common to both wires. The use of balanced lines helps in preventing radiated noise pickup in the
signal cables and has been proven effective in studio installation where long cable runs and magnetic fields make
maintaining signal integrity difficult.

Connecting the BLT

B

ALANCED

L

INE INPUT

–18V

+18V

®

BALANCED LINE TRANSMITTER

®

– R. SIG
+ R. SIG

BALANCED LINE

OUTPUT

R

Speaker

– R +

°

INPUT

LED

L R

L

L

Speaker

Gain

Phase

+ L –

0 – 180

°

• Signal Input Switch to

(Mono)

Bass
EQ

Balanced

Unbalanced

Balanced

R

L

R

Pass Thru

Pass Thru

for Balanced Line Input

• Gain for Left and Right channels set to

– L. SIG

+ L. SIG

Balanced

Input

EZ Bridged

minimum

SHIELD

Gain

180°- 0

CAUTION!! You must turn the gain controls to minimum when using the Balanced Line Transmitter. If the input gains
need to be adjusted, this can now be done in the Balanced Line Transmitter.

– 19 –

Level Setting the BLT

a

O
p

d

e

v

r

a

a

n

t

c

i

e

o

d

n

10.3

+

VAC

–

AUD

DISC

FM

ST

RDM

AM

PWR

VOL

® ®

1kHz Test Tone @ “0dB”

CLOCK

Ch

RPTLD

D.SCN

1 2 3 4 5 6

®

BALANCED LINE TRANSMITTER

L

R

R

ILLUM

AUTO

P.SCN LOUDDSPL

RDM

RPT

SCAN

L

SEL

DIM

TUNE

PAUSE

®

R

• Disconnect Speaker(s) from the amplifier

• CD Software used to set levels is a test tone of 1kHz at “0dB” or “All Bits High”

• Source Unit set to 3/4 volume (or maximum unclipped output)

• Remove BLT Cover to access

• AC Voltmeter set to

AC Volts

• AC Voltmeter “–” connected to

• AC Voltmeter “+” connected to

• Adjust BLT Gain from

3.25 VRMS min.

test pads

RCA shield
test pad

and

gain pots

of BLT

inside the BLT

to

10.3 VRMS max

per test pad (see chart below)

Be sure the time index reads greater than 30 seconds on source unit.

Gain Overlap BLT Output (AC Volts) Performance Characteristics

+0dB* 3.25 VRMS Best S/N Ratio, Reduced SPL

+5dB 5.8 VRMS Good S/N Ratio & SPL

+10dB 10.3 VRMS Best Compromise between S/N Ratio & SPL

*Absence of gain overlap will reduce SPL and may not permit amplifier to reach full output power due to various CD
software.

– 20 –

R

OCKFORD

®

F

OSGATE

A

CCESSORIES

Balanced Line Transmitter (FG-BLT)

The Balanced Line Transmitter converts unbalanced (RCA) signals from the source unit to balanced signals. The
BLT improves sound quality in the system by eliminating noises generated by vehicle electrical systems. The BLT
is available for Rockford Fosgate products that offer a balanced input.

Speaker
+ L –

AUD

DISC

FM

ST

AM

PWR

VOL

® ®

Ch

RPTLD

RDM

CLOCK

ILLUM

AUTO

P.SCN LOUDDSPL

RDM

RPT

SCAN

D.SCN

1 2 3 4 5 6

DIM

R

SEL

TUNE

PAUSE

®

BALANCED LINE TRANSMITTER

®

NOISE

BALANCED LINE

OUTPUT

L

L

Pass Thru

Pass Thru

R

Balanced

Input

R

L

Gain

Phase

0 – 180

°

Bass

EQ

Balanced

Unbalanced

(Mono)

EZ Bridged

R

Gain

180°- 0

Speaker

– R +

°

INPUT

LED

L R

ATTENTION: We recommend your Authorized Rockford Fosgate Dealer install your new accessory.

– 21 –

Energy Storage Capacitors

®

Energy Storage Capacitors are used to provide extra current needed by amplifiers to reproduce musical transients.
The capacitors also have the natural ability to filter AC ripple caused by the alternator, reducing the chance of noise
in the system. The capacitors are available in a variety of values and will maximize both the sound quality and
performance that Rockford Fosgate amplifiers can deliver.

LED

Battery +

REM

B+ GND

® ®

the connecting

1.0

1.0

punch

cap

1 farad • 20 VDC • 95°C

®

• Recommended capacitance is 1 farad per 1000 watts

XCard Crossovers

®

Additional crossover card frequencies are available for specialized requirements. You can get the following XCards
from your Authorized Rockford Fosgate Dealer.

XM50 = 50Hz XM200 = 200Hz
XM70 = 70Hz XM275 = 275Hz
XM80 = 80Hz XM400 = 400Hz
XM100 = 100Hz XM4.5k = 4,500Hz
XM150 = 150Hz XM6.5k = 6,500Hz

XM00 = Blank card for

custom crossover

Crossover Card

High Pass

R1

R2

Low Pass
Full Range

R1

FULL

R2

ATTENTION: We recommend your Authorized Rockford Fosgate Dealer install your new accessory.

– 22 –

T

ROUBLESHOOTING

Symptom Diagnosis Remedy

TROUBLE-

S
H
O
O

T

I
N
G

Amplifier does not turn on.

(Power LED is off)

Amplifier has no sound.

(Power LED is on)

Voltage applied to the REM terminal of the
amplifier is not between 10.5 and 15.5
volts or there is no voltage present.

Voltage to the B+ terminal of the amplifier
is not between 10.5 and 15.5 volts or there
is no voltage present.

Amplifier is not properly grounded.

RCA Input from source unit is not connected
or not functioning properly.

When using the BLT, Balanced Line Input
from BLT is not connected or not function­ing properly.

Check the alternator, battery, fuse, and
wiring and repair as necessary. If the volt­age is above 15.5 volts, have the electrical
system inspected by an authorized car
service center.

Check the alternator, battery, fuse, and
wiring and repair as necessary. If the volt­age is above 15.5 volts, have the electrical
system inspected by an authorized car
service center.

Check wiring and repair as necessary.

Check connections, substitute with known
working source and cables and repair or
replace as necessary.

Check connections, substitute with known
working BLT and cables and repair or
replace as necessary.

Unbalanced/Balanced Line switch is not
selected for corresponding input.

Amplifier is in E-Z Bridge operation but
incorrect signal input, speaker wiring, and/
or left channel 180° phase selection is
chosen.

XCards are missing or not placed properly
in crossover slots.

Speaker leads are shorted to each other or
to the chassis of the vehicle.

Speakers are defective.

Check switch position and correct as neces­sary.

Check signal, speaker wiring, and left chan­nel phase selection installation and correct
as needed.

Check XCard positions and repair or replace
as necessary.

Disconnect existing speakers and test with
known working speakers and wires. If am­plifier plays, check and repair wiring and
installation of speakers as necessary.

Disconnect existing speakers and test with
known working speakers. If amplifier plays,
check and repair speakers as necessary.

– 23 –

Symptom Diagnosis Remedy

Speaker Output Low
or Distorted

Input gain(s) for amplifier incorrectly set.

Source unit output too low or source unit
has no output.

Readjust input gains of amplifier.

Check system with known working source
and repair or replace original source as
needed.

TROUBLE-

S
H
O
O
T
I
N
G

Amplifier Noise

(Turn-on Pop)

No output from Pass-Thru
output of amplifier.

Phase selection of amplifier incorrectly se­lected or speakers wired out of polarity from
the left to right channel.

XCards are missing or not placed properly
in crossover slots.

Low battery voltage or large voltage drops
to the amplifier under load.

Voltage spike from output of preceding
component is entering amplifier through
input signal.

Voltage spike from remote turn-on lead is
entering through REM input terminal.

RCA Input from source unit is not connected
or not functioning properly.

Check speaker polarity and phase switch
position and correct as needed.

Check XCard positions and repair or replace
as necessary.

Check the alternator, battery, fuse or circuit
breaker and power and ground wiring and
repair as necessary.

Disconnect input signal to amplifier and
turn amplifier on and off. If noise is elimi­nated, connect REM lead of amplifier to
source unit with a delay turn-on module.

Use different 12 volt source for REM lead of
amplifier (i.e., battery direct). If noise is
eliminated, use relay to isolate amplifier
from noise turn-on output.

Check connections, substitute with known
working source and cables and repair or
replace as necessary.

When using the BLT, Balanced Line Input
from BLT is not connected or not function­ing properly.

Unbalanced/Balanced Line switch is not
selected for corresponding input.

RCA cables or amplifier connected to Pass­Thru output is defective.

• If noise persists, see your local Authorized Rockford Fosgate Dealer.

– 24 –

Check connections, substitute with known
working BLT and cables and repair or
replace as necessary.

Check switch position and correct as neces­sary.

Check connections, substitute with known
working cables or amplifier and repair or
replace as necessary.

A

UTOSOUND

Q

UICK

Preface:

All audio systems exhibit noise; however, if the level of noise is low enough, and the signal level high enough, noise should not be
a problem. This means that it is very important that the signal level throughout the system be optimized BEFORE dealing with your
noise problem. Using a scope (or a small portable amplifier) and Track 99 (1kHz at all high bits) of Rockford Fosgate CD RF­CD101 (Autosound 2000's CD #101) or Tracks 24 through 29 of Rockford Fosgate CD RF-CD102 (Autosound 2000's CD #102),
adjust the system so that when the maximum usable signal level of the deck is fed into the system, all the preamp level components
clip at the same time. However, we recommend up to as much as a 3:1 voltage overlap with the power amplifiers; i.e. an amplifier
with a 2 volt minimum sensitivity can be driven by up to 6 volts of signal.

Noise Overview:

Car audio electrical accessories are notorious for interfering with car audio systems. The interference commonly arises from three
areas:

1) Power line noise (5%), which can be attenuated with in-line noise filters,

2) Inadequate power supply isolation (45%), which can be cured with transformer signal coupling, additional isolated power
supplies, or changing out components, or

3) Inductive interference (45%) – including loop area inductive noise picked up by the signal cables – which can be remedied by
relocating or rewiring components, rerouting signal cables, or using twisted cable or balanced transmission systems.

C

HECK FOR

C

AR

A

UDIO

2000's

T

ROUBLESHOOTING

S

YSTEMS

Autosound 2000 1-2-3 Method of Logical Troubleshooting

I. MUTE THE AMP(S). Insert a muting plug (shorted male RCA connector) into each amplifier channel. Turn up the amp

sensitivity. Start the car and turn on the headlights, air conditioning, brake lights, etc. Listen for noise in each speaker. Be very
picky here!

A. If still noisy, substitute a small test speaker with short leads for the speakers, crossovers, and speaker leads in the car . If still

noisy, substitute an isolated power supply (120 V AC to 13.8 VDC bench supply or a small motorcycle battery) for the car's
alternator. If the amplifier is noisy with the test speaker, you have a BAD amp. Send it in. It really doesn't matter if it is quiet
or noisy while running on the isolated supply because you have a BAD amp. Send it in for repair and if it was quiet on the
isolated supply, indicate so on the repair tag.

B. If your muted amp is quiet, you've just joined 99.5% of car audio. Amps are usually very clean and do NOT pick up

unwanted noise! Continue on to Step II.

II. DECK TO AMP. Using a new set of signal cables, connect one channel from the output of the deck directly into one channel of

your clean amp. Run the cables outside the car and as far away as possible from the metal of the car. (For noise purposes,
consider a 2" thick cushion of electromagnetic energy emanating from every metal surface in the car.)

A. If still noisy, congratulations, in all probability your equalizer , electronic crossover, DSP, whatchamacallit, are just fine. This

means that you can't get your deck playing quiet with your amp, right? Go to Step III.

B. If all is quiet, congratulations, in all probability your deck and amplifier(s) are fine – you obviously have a problem with

your equalizer, electronic crossover, DSP, etc. Skip on down to “Time for the Processors.”

– 25 –

III. MOVE THE DECK. If you're at this step, it's time to turn your system into an “amplified deck” by temporarily relocating the deck

right ON TOP of the clean amplifier. Then using very, very short signal cables, connect the output of the deck into the input of
the amp and test for noise. Play a zero bit track – silence – and make sure all is completely quiet.
A. If still noisy, you're in a heap of trouble. We suggest that you try another deck and give us a call so that we can put your

name into the record books. It's a bad car audio day for you.

B. If the deck is quiet, then congratulations, you're on your way to a successful installation. It is now time to slowly , methodi-

cally, reinstall the deck back into its final position. T est for noise each step of the way . If the noise returns, suspect the signal
cables. Forget shielding because it will have only a very, minimal effect within the audio band. We highly suggest using
twisted pair cables or a balanced transmission system for cable induced noise.

Time for Processors:

By the end of Step III, you should have the deck playing quietly with the amp, with the quiet cables quietly routed. So it's time to add
the signal processors – one at a time – back into the system. Simply repeat Steps II and III with the equalizer, then the electronic
crossover, etc. However, before MOVING THE SIGNAL PROCESSORS to the amplifier, we highly suggest that you power the noisy
process from an isolated power supply rather than the car's +12 volts DC and chassis ground. Make sure to also connect the turn­on lead to the isolated power supply. If the processor is now quiet, then it is highly probable that the component has inadequate
isolation. Solutions include changing components or permanently adding an external isolated power supply (Call Autosound 2000
at 209-465-3450 for info on isolated power supplies).

Summation:

During the design stage of your vehicles, try to avoid using extra batteries and high output alternators. Extra batteries are nothing but
loads as soon as the engine is started and high output alternators usually make more noise than stock alternators. Also, extra
batteries installed in the trunk of a car will ALWAYS force extra ripple current to flow over the car.

Install Stiffening Capacitors® as close to the power supply input of your amplifier as possible. The big caps will feed the switching
power supplies of your amps and minimize the inductive losses in your power wiring. Plus, they will help your peak system
response.

In problem cases, we highly recommend the use of twisted pair cable rather than coaxial cable for RCA leads. This practice will
greatly minimize cable induced noise – especially in four channel amps!

Don't forget that your system is only as good as its worst component. Do NOT use components with inadequate power supply
isolation or you will be asking for problems.

The best electrical ground on a car is the CHASSIS of the car. Do NOT run gr ound leads up to the case of the alternator or the negative
battery post. Keep ALL ground leads as short as possible.

With properly isolated components, it does NOT matter where the component is grounded. We're sorry to say that with inadequately
isolated components, it matters! With poorly isolated components, different grounds can cause different noises.

The deck is the signal reference ground for the entire sound system. The deck usually has THREE connections to the car's chassis:
The black ground lead, the base of the antenna, and the metal-to-metal bond between the case of the deck and the chassis of the
car. With three grounds, there is usually NO cause to worry about the ground of a deck.

Amplifiers are usually designed with adequate power supply isolation. This means that it should not matter where a deck is
grounded. (Decks are grounded three times and amps float. This is car audio!)

The more components installed on a signal path, the more chances for noise to enter a system. The more electrical accessories on
a car, the more noise will be produced by the alternator.

This information was compiled from more than 20 years of working in car audio. If you would like more information on this topic,
or any other technical aspects of car audio, please call 800-548-8200 and ask for a subscription to Autosound 2000 T ech Briefs
— the monthly magazine for the technically inclined.

– 26 –

D

YNAMIC

P

OWER

M

EASUREMENTS

About the Dynamic Power Measurements

The Audio Graph PowerCube is a test instrument used to measure the output of an amplifier in accordance with IHF-202 industry
standards. The IHF-202 standard is a dynamic power measurement and was developed as a means of measuring power in a
manner that best represents the Real World operation of an amplifier. Many manufacturers, including Rockford Fosgate, at times
will measure amplifier power into a fixed resistor (4 ohm, 2 ohm). While this method is useful in some types of evaluation and
testing, it is not representative of an amplifier that is connected to a speaker and playing music.

Music

Music is dynamic; the sound waves are complex and constantly changing. In order to simulate this, the IHF-202 standard calls
for the input signal to the amplifier to be a 1kHz bursted tone. This signal is input (on for 20 milliseconds) and reduced 20dB
for 480 milliseconds. The signal is gradually increased in level until the amplifier's output exceeds 1% Total Harmonic Distortion
(THD). At 1% distortion becomes audible, therefore, any power produced above that level is considered

unusable

manufacturers represent their amplifiers' output power in excess of 10% distortion. They use many names for this measurement,
such as Total Maximum Power or Maximum Output Power. This is not indicative of the

actual usable output power

Listening to Loudspeakers - Not Resistors

A loudspeaker is not a resistor. A resistor's value (resistance measured in ohms) is fixed. A loudspeaker's impedance is dynamic.
It is constantly changing in value, dependent upon the frequency of the input signal. Therefore, measuring power with the amplifier
loaded into a 4 ohm resistor is not the same as measuring power with the amplifier connected to a 4 ohm speaker. Most people
do not listen to music through a resistor.

A 4 ohm speaker may experience a drop in impedance 4-6 times lower than its nominal (printed) impedance. A speaker will also
create phase shifts in the signal that is passed through it. These phase shifts happen because a speaker is an inductor (voice coil)
and a capacitor (compliance of the surround/spider), as well as a resistor (voice coil wire).

. Many

.

To simulate a speaker the Audio Graph PowerCube measures output power into 20 different loads. It tests at 8 ohms, 4 ohms,
2 ohms and 1 ohm. Each of these impedances is also tested at –60°, –30°, 0°, +30° and +60° phase angles. These different
impedances and phase angles represent the shifts in impedance and phase that can occur in a typical loudspeaker.

Information Cubed

The data acquired in the testing procedure is then graphed in the form of a 3-dimensional cube, hence the name PowerCube.
The

Phase Angle

the

Output Voltage

and the

Output Power,

for each impedance at each phase angle.

What is an Amplifier?

An amplifier by definition is a voltage generating
device, recreating the signal which is input to it
identically but with increased volume. It will be
connected to a reactive load (the speaker). The
impedance of this load and phase of the signal
passing through the load will vary, dependent upon
the frequency of the input signal (music).

Therefore, a perfect amplifier will be able to main­tain the same output voltage regardless of load
characteristics and will not alter the signal it is
reproducing. A perfect amplifier when measured by
the Audio Graph PowerCube would present data

is expressed on the horizontal axis,

is presented on the vertical axis

Impedance

is displayed on the Z axis.

in watts, is listed on the left hand side

Audio Graph – The PowerCube™

MODEL BEING

TESTED

Amplifier:

PUNCH 200.
Serial No:
Owner :

ROCKFORD CORPORATION

85 W

8Ω –60°

*

84 W

–30°

84 W

0°

84 W

30°

86 W

60°

162 W

4Ω –60°

*

157 W

–30°

156 W

0°

157 W

30°

162 W

60°

273 W

2Ω –60°

*

IMPEDANCE

258 W

–30°

251 W

0°

256 W

30°

271 W

60°

390 W

1Ω –60°

*

356 W

–30°

346 W

0°

352 W

30°

390 W

60°

VOLTAGE FROM

BATTERY

2

14.4V x 2

POWER

IN

WATTS

{

–60° (Cap)

MONO = BRIDGED MONO

0°

{

PHASE ANGLES

x2 = STEREO

Rated Power : 100 W @ 4 Ohms

(Ind) +60°

• Example of a Punch 200.2 PowerCube

50V

30V

10V

OUTPUT VOLTAGE

8Ω

4Ω

2Ω

1Ω

{

Impedance

that forms a perfect cube. Unfortunately, amplifiers
are not perfect. The laws of physics generally prevent it. A great amplifier is about the best one can hope to attain.

As you can see by the PowerCube and as you will experience by listening, your Punch amplifier is a GREAT AMPLIFIER!

– 27 –

500.2 S

Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4V
Per channel into a 4Ω load 450 Watts
Per channel into a 2Ω load 730 Watts
Bridged into a 4Ω load 1460 Watts*

Continuous Power Rating (Competition Standard) - Measured at 13.8 Battery Volts
RMS continuous power per channel, both channels driven
into a 4Ω load from 20 to 20,000Hz with less than

0.05% THD (Total Harmonic Distortion) 250 Watts
RMS continuous power per channel, both channels driven

into a 2Ω load from 20-20,000Hz, with less than 0.10% THD 500 Watts
RMS continuous power mono, into 4Ω load

from 20-20,000Hz, with less than 0.10% THD 1000 Watts
Common Mode Rejection Ratio (CMRR): Typically 40dB
Signal-to-Noise Ratio: >100dB (A-weighted)
Frequency Response: 20Hz-20,000Hz ±0.5dB

PECIFICATIONS

Bandwidth: 10Hz–250kHz ±3dB
Damping Factor @ 4Ω (at output connector): >200
Slew Rate: 50V µs
IM Distortion (IHF): <0.05%
Input Impedance: 20k Ohms
Source Unit Compatibility (+15dB gain overlap): 34V max.
Input Sensitivity (+0dB gain overlap): Variable from 350mV to 6V
Pass-Thru Output: Unity Gain
B+ Fuse Size: (External to amplifier) 100 Amp or two 50 Amp
Fuse Type: (1) ANL / (2) AGU
Crossover Slope: 12dB or 24dB/octave Butterworth
Factory Crossover Frequency: 80Hz (0.047µf)
Factory Default Crossover Setting: Full Range
Dimensions: (including end caps) 9-5/8"W x 18-9/32"L x 2-5/8"H

(24.4cm) x (46.43cm) x (6.6cm)

*This is the calculated Dynamic Power Rating. Actual output power exceeded the input capability of the PowerCube.

Specifications subject to change without notice.

– 28 –

L

IMITED

Rockford Corporation offers a limited warranty on Rockford Fosgate products on the following terms:

• Length of Warranty
3 years on electronics 90 days on electronic B-stock (receipt required)
2 years on source units 30 days on speaker B-stock (receipt required)

• What is Covered
This warranty applies only to Rockford Fosgate products sold to consumers by Authorized Rockford Fosgate Dealers in the United
States of America or its possessions. Product purchased by consumers from an Authorized Rockford Fosgate Dealer in another
country are covered only by that country’s Distributor and not by Rockford Corporation.

• Who is Covered
This warranty covers only the original purchaser of Rockford product purchased from an Authorized Rockford Fosgate Dealer in
the United States. In order to receive service, the purchaser must provide Rockford with a copy of the receipt stating the customer
name, dealer name, product purchased and date of purchase.

• Products found to be defective during the warranty period will be repaired or replaced (with a product deemed to be equivalent)
at Rockford's discretion.

• What is Not Covered

1. Damage caused by accident, abuse, improper operations, water, theft

2. Any cost or expense related to the removal or reinstallation of product

3. Service performed by anyone other than Rockford or an Authorized Rockford Fosgate Service Center

4. Any product which has had the serial number defaced, altered, or removed

5. Subsequent damage to other components

6. Any product purchased outside the U.S.

7. Any product not purchased from an Authorized Rockford Fosgate Dealer

W

ARRANTY

I

NFORMATION

• Limit on Implied Warranties
Any implied warranties including warranties of fitness for use and merchantability are limited in duration to the period of the express
warranty set forth above. Some states do not allow limitations on the length of an implied warranty, so this limitation may not
apply. No person is authorized to assume for Rockford Fosgate any other liability in connection with the sale of the product.

• How to Obtain Service
Please call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return
any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.

Ship to: Electronics
Rockford Corporation
Warranty Repair Department
2055 E. 5th Street
Tempe, AZ 85281
RA#:_________________

Ship to: Speakers
Rockford Acoustic Design
(Receiving-speakers)
609 Myrtle N.W.
Grand Rapids, MI 49504
RA#:_________________

– 29 –

NTERNATIONAL

I

I

NFORMATION

– 30 –

LEA DETENIDAMENTE LAS SIGUIENTES INSTRUCCIONES DE INSTALACIÓN DEL PRODUCTO. EVITARA POSIBLES DAÑOS
A VD., AL VEHÍCULO O AL PRODUCTO.

I

NTRODUCCIÓN

Los amplificadores de Punch Power representan lo ultimo y mejor que Rockford Fosgate puede ofrecerle. Muchas soluciones
que nuestros ingenieros han inventado serian consideradas absolutamente desproporcionadas por nuestra competencia.
NO EN ROCKFORD FOSGATE! Trans•
de las mas sobresalientes innovaciones que describimos con mas detalle en el capitulo de Caracteristicas Técnicas de Diseño
en este mismo manual.

U

BICACIÓN DE LOS

Maletero

Monte el amplificador vertical con las altas de refrigeración de arriba a abajo. Es el método correcto para asegurarse la
máxima disipación de calor.

Habitáculo

El amplificador montado en el habitáculo funcionara bien en la medida en que se le proporcione ventilación suficiente para
refrigerarse. Si piensa en montarlo debajo de un asiento deberá dejar como minimo un espacio de 3cm alrededor del
refrigerador.

A

nova

, DIAMOND y TOPAZ diseños exclusivos de Rockford Fosgate, son solo algunas

MPLIFICADORES

ESPAÑOL

Instalación

• Por seguridad desconecte el cable de masa de la bateria antes de empezar la instalación.

Terminal B+

El cable de alimentación deberá tener un fusible como máximo a 30cm de la bateria. Prepare los terminales del cable e
instale el portafusibles en el vano motor (si la bateria estuviera alli ubicada). Recuerde que toda la instalación debe ser
impermeable.

Terminal GND (Masa o negativo)

Prepare un trozo de cable para usarlo como toma de masa. Prepare el chasis rascando toda la pintura y suciedad que pudiera
haber hasta dejar la chapa viva. Conecte el chasis a masa con un tornillo.

Terminal REM (Remoto)

Conecte el terminal REM a un punto de 12V con interruptor. Normalmente se usa la salida Remote o de alimentación de
antena del Radio Cassette. Si el Radio Cassette no la tuviera o no estuviera disponible se recomienda tomar de la caja de
fusibles 12V y colocar un interruptor para asi activar el amplificador.

– 31 –

Operación mono/estéreo

RCA

Input

Speaker

+ L –

°

Bass

EQ

Balanced

Unbalanced

(Mono)

L

L

Gain

Phase

0 – 180

L

Pass Thru

Pass Thru

R

Balanced

Input

R

EZ Bridged

–

Gain

180°- 0

R

Speaker

– R +

°

+

2Ω min. 2Ω min.

+

Speaker

Terminal

+

+–

–

–

Speaker

Terminal

4Ω min.

• Los conectores de entrada RCA se conectan a ambos

canales derecho e

izquierdo

• El conmutador de señal de entrada se colocara en

Unbalanced

para las

entradas RCA

• El conmutador de fase del canal izquierdo estará en

• El conmutador de fase del canal derecho estará en

0 grados

180 grados

cuando se

requiera operación mono/estéro

• La ganancia de los dos canales derecho e izquierdo deberán ser

iguales

para balancear correctamente el subgrave

• La impedancia minima para

cada canal

es de

2 Ω

• La impedancia minima cuando se trabaje en puente será de

exactamente

4Ω

• Deberá seleccionarse una XCard (tarjeta del divisor de frecuencias) de banda
completa

• Passive crossovers are needed for proper stereo/mono operation

– 32 –

ATTENTION: Veuillez lire les instructions suivants pour l'nstallation de ce produit. Ne pas les suivre pourrait causer des
blessures ou endommager le véhicule.

I

NTRODUCTION

La série d'amplificateurs Punch Power est la vitrine technologique de Rockford Fosgate. Nos ingénieurs utilisent ici des
technologies considérées hors d'atteinte par d'autres fabricants. Trans•
par Rockford Fosgate, ne sont qu'une partie des technologies spécifiques décrites dans la section “Technical Design Features”
de ce manuel.

M

ONTAGE

nova

, DIAMOND et TOPAZ, exclusivement conçues

Montage dans le coffre

Monter l'ampificateur verticalement avec les rainures de haut en bas ce qui lui permet de refroidir plus facilement.

Montage dans l'habitacle

Monter l'ampificateur dans l'habitacle ne pose aucun problème, du moment qu'il y ait assez d'air pour le refroidir. Si vous
montez l'ampli en dessous de siège, prévoyez 3cm d'air autour du radiateur.

Installation

Pour votre sécurité, déconnectez la borne négative de la batterie du véhicule avant de commencer l'installation.

FRANÇAIS

Terminal B+

Il est impératif qu'il y ait un fusible sur le câble d'alimentation positif le plus près possible de la borne (maximum 30cm).
Préparez les extrémités du câble et installez le porte fusible sous le capot. Les connexions doivent être étanches.

Terminal GND

Préparez une longueur de câble pour la connexion à la masse. Préparez le châssis en grattant la peinture de la surface
métallique et nettoyez la saleté et l'huile. Attachez le câble au châssis avec une vis.

Terminal REM

Connectez le fill REM à une commande 12 volts positive de la source. La commande 12 volts est habituellement prise sur
la sortie antenne électrique de la source ou la commande accessoire. Si la source ne dispose pas de ces sorties, nous vous
recommandons d'installer un interrupteur qui fournira un positif 12 volts au REM de l'ampificateur.

– 33 –

Opération stéréo/mono (Tri-mode)

RCA

Input

Speaker
+ L –

°

Bass
EQ

Balanced

Unbalanced

(Mono)

L

L

Gain

Phase

0 – 180

L

Pass Thru

Pass Thru

R

Balanced

Input

R

EZ Bridged

–

Gain

180°- 0

R

Speaker

– R +

°

+

2Ω min. 2Ω min.

+
Speaker
Terminal

+

+–

–

–

Speaker

Terminal

4Ω min.

• Les entrées RCA sont connectées aux canaux gauche et droit

• L'interrupteur “Signal Input” doit se trouver dans la position “Unbalanced” pour
utiliser l'entrée RCA

• L'interrupteur “Left Phase” doit se trouver dans la position “0°”

• L'interrupteur “Right Phase” doit se trouver dans la position “180°” pour opera­tion en tri-mode

• Les gains des canaux gauche et droit sont réglés de la même manière pour
équilibrer le subwoofer

• L'impédance de chaque canal devrait être de

• L'impédance du canal mono devrait être de

• Les XCards sont introduites sur

fall range

minimum 2Ω

minimum 4Ω

• Il est conseillé d'utiliser les filtre passifs lorsqu'on fait fonctionner l'amplificateur en
tri-mode

• NE connecter AUCUN des câbles HP à la masse au risque d'un fonctionnement
instable.

• Les filtres passifs sont nécessaires pour une utilisation correcte stereo/mono

– 34 –

Bitte lesen Sie diese Gebrauchsanleitung zuerst sorgfältig durch. Das kann Sie vor dem falschen Einsatz, Ausfallen oder sogar
Beschädigung des Produktes oder Ihres Fahrzeuges schützen.

E

INLEITUNG

Die Punch Power Verstärker repräsentiert das Beste, was Rockford Fosgate anzubiete hat! Unsere Ingenieure haben in diesen
Verstärkern technische Features realisiert, die in der gesamten Auto HiFi-Industrie, einzigartig sind. Trans•
TOPAZ exklusive entwickelt von Rockford. Nähere Informationen hierüber und weitere Beschreibungen finden sie in dieser
Gebrauchsanweisung unter Technical Design Features.

E

INBAUORT

nova

, DIABLO und

Im Fahrzeugkofferraum

Der vertikale Einbau der Endstufen, das bedeutet, dab die Kühlrippen von oben nach unten verlaufen, gibt dem Verstärker
die beste Kühlung.

Auf der Beifahrerseite

Sollte der Verstärker auf der Beifahrerseite montiert werden, so ist es sehr wichtig, für eine ausreichende Kühlung zu sorgen.
Sollte der Verstärker z.B. unter dem Beifahrersitz montiert werden, sollte dem Kühlkörper mindestens ein Luftspalt von 3cm
bleiben, um so für eine ausreichende Kühlung zu sorgen.

Einbau

Zur Sicherheit klemmen Sie den Negativ-Pol der Batterie während des gesamten Einbaues ab.

B+ Anschluss

Die Plus-Leitung mub ca. 40cm nach dem Plus-Pol der Batterie abgesichert sein. Preparieren Sie die Kabellängen und
montieren Sie den Sicherungshalter im Motorraum. ALLE Verbindungen müssen wasserdicht sein.

GND Anschluss

Preparieren Sie Ihr Kabel für die Negativ Leitung (Erdung). Preparieren Sie die Anschlubstelle des Erdungskabels, indem Sie
das Metall gründlich reinigen und vom Lack befreien. Befestigen Sie nun die Erdung an dieser Stelle mit einer Schraube.

REM Anschluss

Verbinden Sie das Ein-und Ausschaltkontroll-Kabel mit Ihrem Radio (12 Volt positiv). Normalerweise verwenden Sie hierfür
die Ant.-Remote Ihres Radios oder ein eigens dafür vorgesehenes Kabel (Amp-Remote). Sollte Ihr Radio diesen Anschlub
nicht besitzen, so verwenden Sie ein 12 Volt Spannung, die Sie durch eine Schalter ein - und ausschalten können.

DEUTSCH

– 35 –

Stereo/Mono Betrieb

RCA

Input

Speaker

+ L –

°

Bass

EQ

Balanced

Unbalanced

(Mono)

L

L

Gain

Phase

0 – 180

L

Pass Thru

Pass Thru

R

Balanced

Input

R

EZ Bridged

–

R

Gain

180°- 0

Speaker

– R +

°

+

2Ω min. 2Ω min.

+

Speaker

Terminal

+

+–

–

–
Speaker
Terminal

4Ω min.

• Chinch Eingänge des rechten und linken Kanales anschlieben

• Signal Eingangsschalter auf “unbalanced” für den Betrieb mit Chinch-Kabel stellen

• Linken Phasen Schalter auf 0° stellen

• Rechten Phasen Schalter auf 180° stellen für den Stereo/Mono Betrieb

• Die Lautsprecher-Phase des rechten Kanales umkehren, um eine Phasenkorrektur zu
erreichen

• Gain Regler des linken Kanales angleichen, um die Lautstärke des Subwoofers
einzustellen

• Impendanz für jeden Kanal sollte minimum

• Impendanz im Brückenbetrieb sollte minimum

2 Ohm

4 Ohm

betragen

betragen

• XCard sollte auf Full Range gesteckt werder

• Passive Frequenzweichen werden für korrekte Stereo/Mono Operationen benötigt

– 36 –

PREGO LEGGERE LE SEGUENTI ISTRUZIONI PER L'INSTALLAZIONE DI QUESTO PRODOTTO, IL NON SEGUIRLE POTREBBE
RISULTARE SERIAMENTE DANNOSO PER LA PERSONA O PER IL VEICOLO.

I

NTRODUZIONE

La serie Punch Power rappresenta il massimo che Rockford Fosgate ha da offrire! I nostri ingenieri hanno sviluppato delle

D

innovazioni tecnologiche che per altri costruttori sono considerate fantascienza, ma non per Rockford Fosgate! Trans•
DIAMOND e TOPAZ, esclusivamente progettati da Rockford, sono solo alcune delle innovazioni descritte nella sezione
specifica del manuale.

OVE

P

OSIZIONARLO

Nel Bagagliaio

Montando l'amplificatore su una superficie in verticale con le alette direzionate dall'alto verso il basso si garantirá un miglior
raffreddamento dell'amplificatore.

Nell'abitacolo

Montare l'amplificatore nell'abitacolo si avrá un funzionamento regolare se si garantisce un flusso d'aria sufficiente. Per
l'installazione sotto un sedile, é necessario avere uno spazio di almeno 3 cm attorno a tutto l'amplificatore.

nova

,

Installazione

Per sicurezza, scollegare il polo negativo della batteria dell'auto prima di iniziare l'installazione.

Terminale B+ (cavo positivo)

Il cavo positivo deve essere protetto da un fusibile a non piú di 45 cm dalla batteria. Terminare il cavo e installare il fusibile
nel vano motore. Tutte le connessioni devono essere a prova d'acqua.

Terminale GND (cavo negativo)

Decidere la lunghezza del cavo e terminarlo. Preparare la massa grattando la vernice dal telaio dell'auto ed eliminando
tracce di olio o sporco. Fissare il cavo di massa al telaio con una vite.

Terminale REM (Consenso di accensione)

Collegare il cavo REM ad un positivo presente solo ad autoradio accesa (normalmente il cavo pilota dell'antenna elettrica
o il cavo accessori dell'autoradio). Se la sorgente non dovesse essere equipaggiata con queste uscite, la soluzione
raccomandabile é di inserire un interruttore su un cavo positivo e connettersi all'amplificatore.

– 37 –

ITALIANO

Stereo/Mono Operation

RCA

Input

Speaker
+ L –

°

Bass

EQ

Balanced

Unbalanced

L

(Mono)

L

Gain

Phase

0 – 180

L

Pass Thru

Pass Thru

R

Balanced

Input

R

EZ Bridged

–

Gain

180°- 0

R

Speaker
– R +

°

+

2Ω min. 2Ω min.

+

Speaker

Terminal

+

+–

–

–

Speaker

Terminal

4Ω min.

• RCA inputs non sono collegati ad entrambi, i canli destro e sinistro

• Interruttore di segnale input selezionato per il non bilanciamento per l'input
RCA

• Fase sinistra dell'interruttore posizionata su 0°.

• Fase destra dell'interruttore posizionata su

180°

per l'operazione stereo/mono

• Tutta la polaritá dell'altoparlante del canale destro é invertita per correggere il
segnale di fase

• Gain per i canali destro e sinistro posizionati ugualmente per bilanciare i
subwoofer

• Impedenza per ogni canale deve essere

• Impedenza per i canali a ponte deve essere

• XCard é posizionata per

tutto il range

minimo 2Ω

minimo 4Ω

• Crossover passivi sono indispensabili per un corretto funzionamento stereo/

mono

– 38 –

MAN-1770-A
9/96

MADE IN THE USA

This product is designed, developed and assembled in the USA by a dedicated group
of American workers. The majority of the components used in the construction of this

product are produced by American companies. However, due to the global nature of

their manufacturing facilities and the loudspeaker parts industry in general, some

parts may be manufactured in other countries.

Rockford Fosgate

Rockford Corporation

546 South Rockford Drive

Tempe, Arizona 85281 U.S.A.

In U.S.A., [phone]

In Europe, Fax [phone]

In Japan, Fax [phone]