This is a bare board of a high-end pure class A amplifier ( one channel only). The design is reference to MF's legendary A1 power amplifier. Although it was launched 20+ years ago, it is still among the best of class A solid state amplifiers in terms of musicality.

This listing has included two pieces of thick aluminum mounting of TO-3 power transistors to heatsink.

This is an sale for one channel of amplifier PCB. To form a stereo amplifier two PCBs are needed. PCB dimension : 210mm x 52mm. 

This listing is for one channel of bare PCB. The assembled amplifier picture is for reference only.