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.
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