Linear Power Amplifier


The VSA-L serie power amplifier is a high performance linear power amplifier, which combines traditional power amplification, leading edge IC and control technology. It uses step amplification and takes advantage of the new Power MOSFET with superior power output characteristics. It has been widely used for measurement and calibration.

With an embedded design, it has a comprehensive and real-time monitoring of the amplifier. Therefore, it has good protection functions and man-machine interaction. Meanwhile, it has low noise with air cooling design and has a working temperature range from 0℃- 40℃.


  • Outstanding output feature: low noise and less harmonic distortion
  • Working mode: constant current, constant voltage
  • Coupling mode: AC, DC
  • Phase mode: 0°, 180°
  • Independent monitor channel: output with 0.1V/V, output current with 0.1V/A
  • Input current: manually adjust
  • Safety protection: overcurrent, overvoltage, overheat, self-locking, inter-locking
  • Screen Monitoring: key parameters
  • Working temperature: 0℃- 40℃


Performance Parameters  

 VSA-L180A  VSA-L180B  VSA-L500A  VSA-L1000A
Output Power  180VA  180VA  500VA  1200VA
Max output Voltage RMS  27Vrms  12Vrms  45Vrms  72Vrms
Max output current RMS   6.8Arms  15Arms  11.2Arms  18Arms
Rated Impendance  4Ω  0.8Ω  4Ω  4Ω
Frequency Response  DC to 10kHz(±0.5dB)  DC to 10kHz(±0.5dB)  DC to 10kHz(±0.5dB)  DC to 10kHz(±0.5dB)
 AC/DC(single-ended)  AC/DC(single-ended)  AC/DC(single-ended)  AC/DC(single-ended)
Coupling Method  AC/DC(single-ended)  AC/DC(single-ended)  AC/DC(single-ended)  AC/DC(single-ended)
Working Modes  Current/Voltage  Current/Voltage  Current/Voltage  Current/Voltage
Max input Voltage Peak  <5V  <5V  <5V  <5V
Harmonic distorition  <0.1%  <0.1%  <0.1%  <0.1%
SNR  >90dB  >90dB  >90dB  >90dB
Amplitude Linearity  <0.1%  <0.1%  <0.1%  <0.1%
Input impendance  >10kΩ  >10kΩ  >10kΩ  >10kΩ
Phase  0°/180°  0°/180°  0°/180°  0°/180°
Protection Over current,Over voltage,Over heat Over current,Over voltage,Over heat Over current,Over voltage,Over heat Over current,Over voltage,Over heat
Dimensions(mm) 445mm×435mm×90mm 445mm×435mm×90mm 445mm×435mm×90mm 445mm×435mm×90mm
Weight 18kg 20kg 21kg 50kg
Power supply Parameters Power supply:220V AC,50~60Hz
Environment Parameters Temp:Working Temp:0°C-40°C,Storage Temp:-40°C-60°C
Humidity:20% to 90%RH non-condensing(20%-90%RH non-condensing(20°C)