CONTROL-2.6 CONTROL-1.6 VS-50 VS-40 VS-34 VS-20 VS-15
VS-2004 VS-1204 VS-1203 DC-204 DC-10 V-2 V-3.5M
V-6 V-9 V-9T
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The VS-1204 is quad or two channel amplifier which also has the capability of being used as a high power stereo power amplifier. Using the VS-1204 in it's bridge modes opens up new possibilities for bi-amp tri-amp or zoned speaker applications.

  • 4CH Mode, 2CH Mono/Bridge Mode, Parallel Mode.
  • Two Selectable Low Cut Filters.
  • Perfect controlled for no clipping output from STK CTLL circuit module.
  • Ultra Low Distortion Class AB Output Circuit.
  • 1200W(300W per CH)at 4 ohm & 600W at 8hom Stereo
  • 0.04% THD 20Hz~40kHz.
  • Flip-Flop Controlled Full Prodection Circuitry.
  • 2U Space 1.2mm Steel Chassis Construction.
Model VS-1204
Stereo Mode (both channel driven) Continuous Average Output Per Channel
FTC @ THD+N=0.1%, f=20Hz~20kHz Ch1 Ch2 Ch3 Ch4
8 ohm/Stereo 200W 200W 200W 200W
4 ohm/Stereo 300W 300W 300W 300W
EIA @ THD+1=1%, f=1kHz Ch1 Ch2 Ch3 Ch4
8 ohm/Stereo 210W 210W 210W 210W
4 ohm/Stereo 330W 330W 330W 330W
Bridge Mode  
FTC @ THD+N=0.1%,f=1kHz  
8 ohm/Bridge 600W 600W
4 ohm/Bridge    
Power Bandwidth
(Ref. 1kHz, THD+N=0.1%,+0/-1dB)
(Ref. 1kHz,f=20Hz~20kHz)
Frequency Response
(Ref. 1kHz, 1watt output, +0/-1dB)
(60Hz:7kHz, 4:1 Half power)
4-8 ohm/Stereo ≤0.1%
8 ohm/Bridge ≤0.1%
(RL=8Ω, Half power, Att.Max 600Ω shunt)
≥63dB, 1 kHz
Residual Noise
(20Hz~22kHz LPF,Att.min)
S/N Ratio
(Filter:A-Weighting, RMS)
Damping Factor
(RL=8Ω, f=1kHz)
Input Sensitivity (Att. max)  
4 ohm/Stereo +4.0 dBu
8 ohm/Bridge +5.1 dBu
Voltage Gain(Att. max) 29dB
Output Circuitry AB
Input Impedance 10kΩ(balance)
Front panel AC Switch,Ch1,2,3,4 gain Control knobs
Rear panel Stereo/Mono Bridge Ch1&2, Ch3&4 Stereo/Parallel
    Shift ch1&2, Ch3&4
    HPF Ch1&2, Ch3&4, Clip limiter(option)
Input XLR Female jack
Output 5 way Touch-Proof binding posts
Indicators Power(Green),Level(Green),Protect(Red)
Clip(Red), Mono Bridge(Amber)
Parallel Shift(Amber)
Bar Graph In/Out level
Protection Circuits 1)Short Circuits
2)Current Limit
3)DC detection
5)Turn On/Off muting
6)Power supply shutdown
7)AC Line fuse
Fan Circuit Two Fans Variable Low Speed(50℃),
High speed(60℃)
Power Consumption
(1/3 power)
DIMENSION 480mm X 88mm X 460mm
Weight 11.72kg / 25.83 Ibs
*Specifications Subject to change without notice.
*Above specifications is 230V AC mains voltage condition.
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Tel. 82-32-525-1788~1789 Fax. 82-32-525-1784   E-mail : stkcom@stkpro.com