Inter-m S3000, S4000 Operating Manual

OPERATING MANUAL

PROFESSIONAL POWER

AMPLIFIER

S3000/4000

11

UNPACKING AND INSTALLATION

Although it is neither complicated to install nor difficult to operate your Power Amplifier, a few minutes of your
time is required to read this manual for a properly wired installation and becoming familiar with its many
features and how to use them. Please take a great care in unpacking your set and do not discard the carton
and other packing materials. They may be needed when moving your set and are required if it ever becomes
necessary to return your set for service. Never place the unit near radiators, in front of heating vents, to direct
sun light, in excessive humid or dusty location to avoid early damage and for your years of quality use.
Connect your complementary components as illustrated in the following page.

This symbol is intended to alert the user to the

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING

To prevent fire or shock hazard, do not
expose the unit to rain or moisture.

This symbol is intended to alert the user to the
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.

Caution: To prevent electric shock do not use this (polarized) plug with

an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.

Attentions: Pour prévenir les chocs électriques ne pas utiliser cette fiche

polarisée avec un prolongateur, une prise de courant on une
autre sortie de courant, sauf si les lames peuvent étre
insérées à fond sans en laisser aucune partie à découvert.

FEATURES

HIGH PERFORMANCE POWER AMPLIFIER WITH SMPS SYSTEM

Adopting high efficient switching mode power supply, the amplifier is possessed of high power performance
with reliability, and its weight is light.

DUAL MONORAL POWER SUPPLY

The amplifier is operated by independently power supply for each channel. If one channel is break down,
another channel can be perform well.

REMOTE POWER ON/OFF CONTROL (STAND-BY)

HIGH EFFICIENCY CIRCUIT TYPE

High efficient 3-step(S4000) output circuit for lower AC current consumption and advanced thermal
performance. (S3000:2-step output circuit)

VARIOUS LED INDICATORS

To confirm the operating status, LED display of Power, Stand-By, Signal, Level, Clip and Protection on front
panel.

VARIOUS PROTECTION CIRCUITS

To insure stability against over current, over heating, output short, turn on/off delay, RF protection, clip­limiter, DC fault detection power supply shutdown circuitry is provided.

22

MODE SELECTOR SWITCH

Operating Modes are PARALLEL, STEREO and BRIDGED-MONO.

VARIABLE FAN COOLING METHOD

Continuously variable speed fan for silent operation (Air flow: from rear to front).

33

4000

S

PROFESSIONAL POWER AMPLIFIER

CLIP

-10dB

-20dB

SIGNAL

CLIP LIMITER10111213141618212780012345678900

1112131517192229541001234567890

0

1045

CHANNEL 2

CHANNEL 1

PROTECT

STANDBY

POWER

POWER

1011121314161821278001234567890

0

1112131517192229541001234567890

0

FRONT PANEL CONTROLS

1. POWER SWITCH
Use this to power the amplifier on or off.

2. POWER INDICATOR
Power indicator is driven by power switch, and the LED turns on when the amplifier is powered ON.

3. LEVEL CONTROLS
Separate level controls allow you to adjust the input level of the arriving at the rear panel input connectors.
At the fully counterclockwise position, the signal is infinitely attenuated. At the fully clockwise position, and
signal is at unity gain. When 1Vrms of signal arrives at the input connectors and the channel input controls
are set to their

MAX” position, the amplifier delivers full power output.

4. SIGNAL INDICATORS
The signal indicators turn on brightly when 1 watt signal level is present in the output.

5. OUTPUT LEVEL INDICATORS
The output level indicators turn on when amplifier has been turned on and has power. These LEDs turn on
when -20dB and -10dB signal level below rated output power is present in the output.

6. CLIP-LIMITER INDICATORS
The clip-limiter indicators turn on when a distortion level above 1% THD is present in the output.

7. CLIP-LIMITER SWITCHES
Use this to prevent the amplifier from continuous clipping in each channel output.

8. STAND-BY INDICATOR
The stand-by indicator turns on when the stand-by switch (2p screw terminal) on rear panel turned on.

9 PROTECTION INDICATOR

The protection indicator turns on when a protection circuit in the amplifier is operating by an abnormal
condition as follows.

* Thermal protection....................When the heatsink and main switching power transformer

temperature should climb above 100

* Full short protection ........................The output circuit protects the output devices from short circuits and

stressful loads.

* DC fault protection ..........................The outputs will mute if DC or excessive subsonic energy appears at

them.

* RF protection...............................The input circuits are isolated by 10KΩ resistors. An supersonic

network decouples RF from the outputs and helps keep the amplifier
stable with reactive loads.

* Turn on/off muting ...........................Turn on/off muting blocks transients from the amplifier or preceding

devices from reaching the speakers. The turn on delay has been
extended somewhat, and turn off muting.

* Clip limiting ...................................During normal operation, the clip limiter does not affect the audio

signal and is, in fact, inaudible. It will allow brief clipping of peaks,
activating only when continuous, hard limiting occurs. The clip limiter
will then gradually reduce the audio signal (up to 10dB) to minimize
clipping. When clipping ends, the clip limiter will deactivate and cease
its gain reduction.

* Inrush current protection.................ln rush current is limited by an NTC resistor (Negative Temperature

Coefficient) which starts at a high resistance and then diminishes
after turn on to avoid loss of power.

, protection circuit is operated.

44

10. HANDLES
You can handle the amplifier easily by using these handles.

55

S/N

PROFESSIONAL POWER AMPLIFIER

MODEL NO : S-4000

MADE IN KOREA

~AC INPUT
230V 50Hz

4100W

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

CAUTION;

TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

AVIS;

RISQUE DE CHOC ELECTRIOUE NE PAS OUVRIR.

20K BALANCED
10K UNBALANCED

INPUT SENSITIVITY : 0dBV

INPUT IMPEDANCE

PUSH

2

1

3

HOT GROUND

COLD

PUSH

2

1

3

HOTGROUND

COLD

REAR PANEL CONTROLS

1. AC INPUT
Plug this AC input cord into AC outlet.

2. INPUT TERMINALS (CHANNEL 1, 2)
Input connectors are provided both balanced combination jacks.
Channel 1 input terminal is used in Bridge mode and parallel mode.

XLR-TYPE CONNECTION

They are wired pin 1-ground, pin 2-hot(+), and pin 3 cold(-)

GROUND

PHONE JACK

They are wired tip-hot(+), ring-cold(-), and sleeve-ground.

XLR-MAIL

FOR LINK

HOT

COLD

COLD

COMBINATION

HOT

FOR INPUT

GROUND

COLD

GROUND

GROUND HOT

HOT

3. MODE SELECTOR

CH 1

CH 2

CH 1

CH 2

CH 1

CH 2

By the mode select switch, these amplifier can be used for stereo, input parallel and bridged mono
function.

1) PARALLEL MODE 3) BRIDGED MONO MODE

66

4. OUTPUT TERMINALS
Output terminals are dual five-way binding posts and speaker connectors. Do not parallel the two outputs
of each channel by connecting them (together, or parallel them) with any other amplifier output.
*When speakers are connected through speaker, please make sure correct connection of each pin, and
refer speaker pin number.

STEREO MODE BRIDGED MODE

B
R
I
D
G
E
D

(+)

M
O
N
O

(-)

(+) (-)

CH 1

(+) (-)

CH 2

OUTPUT

AMP OUTPUT CH 1, CH 2

1- 1+

2+ 2-

NOT CONNECTED

B
R
I
D
G
E
D

(+)
M
O
N
O
(-)

(+) (-)

CH 1

(+) (-)

CH 2

OUTPUT

NOT CONNECTED

1- 1+

2+ 2-

MONO(BTL)

CH 1 OR CH 2

The minimum impedance for the connected speaker system is specified in “Speaker Impedance” on page8.

*OUTPUT CONNECTORS(BINDING POST)

Use these to connect the amplifier to loudspeakers, wiring method is as fallows.

1)Stereo mode: RED (CH1&2) : HOT

BLACK (CH1&2) : COLD

2)Bridged mono mode: RED (CH1) : HOT

BLACK (CH2) : COLD
BLACK (CH1&2) : USELESS TERMINAL

77

STANDYBY

ENABLE

POWER SUPPLY

CONTROL

+

+

STANDYBY

ENABLE

POWER SUPPLY

CONTROL

STANDYBY

ENABLE

+

+

+

+

POWER SUPPLY

CONTROL

5. STAND-BY SWITCH
Use this to stand-by the amplifier for power supply control.

1) ONE AMPLIFIER

External Switch

2) MULTIPLE AMPLIFIER

6. FAN
Continuously variable speed fan is operated by the thermal sensors on the main heatsink or the switching
power transformer.

External Switch

88

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

(4Ω min)

(4Ω min)

(8Ω min)

(8Ω min)

(8Ω min)

(8Ω min)

BRIDGE

PARALLEL

STEREO

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

(4Ω min)

(4Ω min)

BRIDGE

PARALLEL

STEREO

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

BRIDGE

PARALLEL

STEREO

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

BRIDGE

PARALLEL

STEREO

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

(8Ω min)

BRIDGE

PARALLEL

STEREO

(8Ω min)

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

(8Ω min)

BRIDGE

PARALLEL

STEREO

STEREO MODE AND BRIDGED MONO MODE

STEREO MODE

In this mode, channels 1 and 2 operate independently (typical stereo amplifier). Channel 1 input signal
feeds channel 1 power amp, and channel 2 input signal feeds channel 2 power amp. In this mode, the
minimum speaker impedance per channel is 4Ω.

BRIDGED MONO MODE

In this mode, channels 1 and 2 are bridged together and work as one mono amplifier. In this mode, the
minimum speaker impedance is 8Ω.

SPEAKER IMPEDANCE AND CONNECTION

The series amplifier has three operating modes: Stereo, Bridged and Parallel and allows you to connect
multiple speaker systems in parallel. Therefore, the minimum speaker impedance various depending on the
combination of these speakers. Be sure that the speaker impedance falls below the specified impedance.
The figures below show the examples of connection is Stereo mode and Bridged mode, and speaker systems
connected in parallel in Stereo mode, and the respective minimum impedance.

STEREO MODE CONNECTIONS BRIDGED MODE CONNECTIONS

99

10mm

CAUTION FOR SPEAKER CONNECTION AND INSTALLATION

1. Turn off the POWER switch.

2. After removing approx. 10mm of insulation from the ends of the speaker cables, pass the bartends of the
speaker wires through the holes in the corresponding speaker terminals and tighten the terminals to
securely clamp the wires.
Refer to page 6 for speaker polarity.

At the time make sure that the bare ends of the speaker cables do not extend from the terminals in such a
way that they touch the chassis.

Wire should not
touch the chassis

3. SPEAKER CABLE
If you use a long speaker cable, use as thick a cable as possible to prevent deterioration of the damping
factor or power loss inside the cable. Even the thickest cable can be used for the speaker terminal of this
unit.

4. The amplifier are capable of hazardous output voltage. To avoid electrical shock when using the Binding
Posts for speaker connections, do not touch exposed speaker wiring while the amplifier is operating.

5. To avoid damage to the amplifier mounting ears and/or rack rails, the amplifier must be supported at all
four corners when used in portable racks.

6. AIR FLOW
The amplifier intakes cool air through the rear panel and exhausts warm air out the front panel. When
mounting amplifiers in a portable rack, make sure the rear panel is completely open for ventilation.

7. To reduce temperature of amplifier in rack, use to blank panel between the two amplifier.

CONNECTIONS

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

AUDIO MIXER

~AC INPUT

220V 60Hz, 12W

FUSE

0.08A/250V

STEREO/MONO

LOW

HIGH

INPUT 2

GROUND
FRAME FLOAT

MID

HIGH

MONO SUBWOOFER

LOW

HIGH

INPUT 1

LOW

INPUT

STEREO

MONO

S/N

DIV-9123

~AC INPUT

220V 60Hz, 12W

FUSE

0.08A/250V

STEREO/MONO

LOW

HIGH

INPUT 2

MID

HIGH

MONO SUBWOOFER

LOW

HIGH

INPUT 1

LOW

INPUT

STEREO

MONO

S/N

DIV-9123

R

L

SPEAKER L

TWEETER

MID RANGE

WOOFER

SPEAKER R

TWEETER

MID RANGE

WOOFER

MIC

CASSETTE DECK

GUITAR

GROUND
FRAME FLOAT

3 WAY CONNECTION

1100

1111

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

AUDIO MIXER

R

L

SPEAKER

SPEAKER

SPEAKER

SPEAKER

AUDIO MIXER

R

L

MIC

GUITAR

BRIDGE

PARALLEL

STEREO

CH 2

CH 1

(+)

(-)

OUTPUT

(-)D(+)BRIDGEMONO

(+)

(-)

STANDYBY+ENABLE

+

POWER SUPPLY

CONTROL

PUSH

PUSH

PUSH

PUSH

INPUT

CH 2

CH 1

CH 1

CH 2

SPEAKON CON.

(STEREO)

1+:POSITIVE
1-:GND
2+,2-:NOT CONNECT

SPEAKON CON.

(BRIDGED MONO)

1+:(CH 1)
1+:(CH 2)

CONNECTIONS

SINGLE AMP CONNECTION

BRIDGED MONO MODE CONNECTION

1122

SPECIFICATIONS

ELECTRICAL

Rated Output Power (1 KHz, 1 % THD)

8Ω (per channel)...........................................................................................S3000:750W, S4000:1000W

4Ω (per channel) ........................................................................................S3000:1200W, S4000:1600W

2Ω (per channel)........................................................................................ S3000:1500W, S4000:2000W

8Ω (bridged mono.......................................................................................S3000:2100W, S4000:2800W

4Ω (bridged mono)......................................................................................S3000:3000W, S4000:4000W

Input Sensitivity..................................................................................................................................1 Vrms

T.H.D....................................................................................................................................Less than 0.1%

Frequency Response ................................................................................................20Hz-20KHz, 0.5dB

S/N................................................................................................................................... Less than -100dB

Channel Separation............................................................................................................Less than -80dB

Damping Factor.................................................................................................................Greater than 500

Indicators

Power LED.......................................................................................................................................Green

Stand-by LED...................................................................................................................................Yellow

Protect LED.........................................................................................................................................Red

Signal LED.......................................................................................................................................Green

Level LED (-20dB) ...........................................................................................................................Yellow

Level LED (-10dB) ...........................................................................................................................Yellow

Clip LED ..............................................................................................................................................Red

Input Impedance.....................................................................................................................10KΩ UNBAL

....................................................................................................................................................20KΩ BAL

Connectors

Input Connectors..........................................................................................XLR Jack, Combination Jack

Output Connectors.........................................................................................Speakon jack, Binding Post

Protection Circuits................................................................................................Full short circuit, RF-Port,

....................................................................................................................DC-fault, Thermal limiting/Muting,

.............................................................................................................................ON/OFF muting, Clip-limiter

Power Supply System.....................................................................SMPS (Switching Mode Power Supply)

Output Circuit..........................................................................................2 step high efficient circuit(S3000)

...................................................................................................................3 step high efficient circuit(S4000)

Cooling Method...................................................Continuous variable speed fan, air flow from rear to front

GENERAL

Power Source........................................................................................................AC 110V~240V, 50/60Hz

Power Consumption......................................................................................S3000:3400W, S4000:4100W

Weight.................................................................................................................S3000:17Kg, S4000:18Kg

Dimensions........................................................................................................482(W)x132(H)x437(D)mm

*Specifications and design subject to change without notice for improvements.

MADE IN KOREA