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    VS-40(New Version)
 
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STK 2-4-8 ohm speaker outputs VS series power amplifiers are designed for high operating efficiency and accurate sonic performance across the full audio bandwidth, even under stressful conditions.
In order to maintain strict quality assurance standards. The VS series are built -in Digital switch mode power supply with gate isolated type driver transformers and trigger circuit for output spark current to protect output switching devices.
Have a lot of parallel output devices to make high value damping factors with H class output circuit for high efficient thermal capacity. The STK amplifiers are protected damage from shorted outputs,over heating and DC faults for speakers.
The STK VS series are ready to deliver several thousand watts for your several high power input speaker systems.

  • Have lots paralleled output device for capable 2ohm load and high damping factors.
  • Specially designed for 4 ohm bridge mode power output.
  • Powerful digital dual power supply for high power output regulation.
  • Excellent thermal capacity and lowest AC current draw.
  • Precision controlled 7 way full protection circuitry (Over heat, Over current, DC detection, Short load, Main voltage detector, Power supply shut-down, Power ON/OFF)
  • Digital control over load detector for SMPS current draw.
  • Automatic Speaker output clipping control by STK CTLL circuit module.
 
SPECIFICATIONS
Model VS-40(New Version)
Stereo Mode (both channel driven) Continuos Average Output/per CH
FTC @ THD+N=0.1%, f=20Hz~20kHz Ch1 Ch2
8 ohm/Stereo 1150W 1150W
4 ohm/Stereo 1750W 1750W
2 ohm/Stereo 1800W 1800W
EIA @ THD+1=1%, f=1kHz
8 ohm/Stereo 1200W 1200W
4 ohm/Stereo 1800W 1800W
2 ohm/Stereo 2000W (Short term) 2000W (Short term)
Power Bandwidth
(Ref. 1kHz, THD+N=0.1%,+0/-1dB)
20Hz~30kHz
THD+N
(Ref. 1kHz,f=20Hz~20kHz)
¡Â0.05%
Frequency Response
(Ref. 1kHz, 1watt output, +0/-1dB)
20Hz~40kHz
IMD(SMPTE4:1)
(60Hz:7kHz, 4:1 Half power)
 
4-8 ohm/Stereo ¡Â0.1%
2 ohm/Parallel ¡Â0.1%
Crosstalk
(RL=8¥Ø, Half power, Att.Max 600¥Ø shunt)
¡Ã64dB, 1 kHz
Residual Noise
(20Hz~22kHz LPF,Att.min)
¡Ã70dB
S/N Ratio
(Filter:A-Weighting, RMS)
¡Ã107dB
Damping Factor
(RL=8¥Ø, f=1kHz)
¡Ã400
Input Sensitivity (Att. max) +0 or +4.0 or +7.0dBu by select switch
4 ohm/Stereo up to +2.1dBu from 4ohm/Stereo Input
8 ohm/Bridge  
Voltage Gain(Att. max) 38dB
Output Circuitry H Class 2-Step
Input Impedance 6k¥Ø(Unbalance), 12k¥Ø(Balance)
Controls  
Front panel AC Switch,Ch1 and Ch2 gain knobs
Rear panel Parallel, Stereo/Mono, Clip limiter(option), HPF Switch, Sensitivity selector
Connectors  
Input XLR jack
Output XLR Male Jack(In put Through)
Speakon Jack
Indicators Protect(Red),Power (Green), Mono Bridge (yell), Parallel(Green),Peak Clip (Red), 3 step level meter (Green)
Protection Circuits   1)Short Circuits
2)Current Limit
3)DC detection
4)Thermal
5)Main Voltage Detect
6)Power supply shutdown
7)AC Line fuse
 
Fan Circuit Four Fans Variable Low Speed(50¡É),
High speed(60¡É)
Power Consumption
(1/3 power)
2100Watts
DIMENSION 480mm X 88mm X 495mm
Weight & volume (Net/Shipping) 16.08kg / 17.58kg & 0.0681cbm
*0dB=0.775V
*Specifications Subject to change without notice.
*Above specifications is 230V AC mains voltage condition.
 
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