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-20 is sustained ultra-low impedance caplbility. High voltage two-step output circuit.The VS-20 ultra-low distortion class AB output circuit.

  • Available 4 ohm and 8 ohm load for bridge mode.
  • High frequency power supply.
  • Logical LED meters are present for power IN/OUTPUT level.
  • Ultra lowest in-rush current.
  • Flip-flop controlled full protection circuitry.
  • 1.2mm steel chassis and 2U space.
  • 2000W(1000W per CH) at 4 ohms 0.05% THD 20Hz~40kHz.
  • Class AB output circuit with STK CTLL module for Control In/Out level clipping.
Model VS-20
Stereo Mode (both channel driven) Continuous Average Output Per Channel
FTC @ THD+N=0.1%, f=20Hz~20kHz Ch1 Ch2
8 ohm/Stereo 600W 600W
4 ohm/Stereo 1000W 1000W
EIA @ THD+N=1%, f=1kHz
8 ohm/Stereo 650W 650W
4 ohm/Stereo 1030W 1030W
Bridge Mono Mode (both channel driven)  
FTC @ THD+N=0.1%, f=1kHz  
8 ohm/Bridge 2000W
4 ohm/Bridge 2000W
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)
≥64dB, 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 36dB
Output Circuitry H Class 2-Step
Input Impedance 6kΩ(Unbalance), 12kΩ(Balance)
Front panel AC Switch,Ch1 and Ch2 gain control knobs
Rear panel Stereo/Mono Bridge,Clip limiter(option), HPF Switch
Input XLR jack ,1/4" TRS jack
XLR male Jack(In put Through Out
Output Speakon Jack, 5-Way binding Post
Indicators Power(Green),Protect(Red),Clip(Red),
Mono Bridge(Green)
Bar Graph In/Out level meters.
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 13.92 kg / 30.68 Ibs
*Specifications Subject to change without notice.
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Tel. 82-32-525-1788~1789 Fax. 82-32-525-1784   E-mail : stkcom@stkpro.com