MST-250 Class AB Power Amplifier
Build your Pro High Power Output Real 200W @ 8 Ohm Load 
Bipolar Powerful Very High Quality Audio Amplifier 
Assembled PCB & tested.
 High quality and reliability FR4 1.6MM PCB 
Very High Power output Transistors Original and Genuine
DC Offset calibration
This item is PCB with all components assembled ready to use. only need add to Large Heatsink and Power Supply
For Stereo Version you need Order 2 PCB !!! 
Easy and simple to connect. 
The recommended transformer for this amplifier is:
4 Ohm Stereo version: 2X40Vac 6.3A (500VA)
8 Ohm Stereo version: 2X50Vac 5A (500VA)
Working Voltage: +/- 50V Vdc TO MAX. +/- 70 Vdc (Recomended +/-60Vdc)
Power Out: 200W @ 4Ohm [+/-60 VDC] OR 200W @ 8Ohm [+/-70 VDC]
Input sensitivity: 1.2V (For max. power drive)
PCB Size: 170mm*65mm double-sided HAL,FR4 1.6MM

Specification:

RMS continuous power:

200 Watts driven into a 4Ω load (tested with 2X60V DC Power Supply)

200 Watts driven into a 8Ω load (tested with 2X70V DC Power Supply)

0.02% Total Harmonic Distortion (THD+N)

Load: 4-8Ω 

Signal-to-Noise Ratio: >102dB A-weighted

Frequency Response: 20Hz to 20kHz ±0.5dB

Bandwidth: 20Hz to 100kHz -1dB

Input Impedance: 22k ohms

Large Heatsink Need

ApplicationsDIY HI-FI Home/DJ/PA Power Amplifier, HI-FI Home/DJ/PA Subwoofer Amplifier