This is my DIY try build high power amplifier named SOCL 506 with TEF system in the output.

Also we say thanks for the SOCL series designer for the schematic that I used (Terimakasih mbah suwun izin saya pakai rancangan SOCL nya ya mbah..)

The output stage uses transistor 8 pair of 2SC5200 and 2SA1943 in parallel it can give power about 500-600W according to my transformer 47-0-47 /10A (66VDC X 10A).

You can upgrade the transformers with the higher current or voltage according to your need.

It have dc servo inside so you don't need to adjust dc offset manually.

This amplifier need and match with 2U heatsink.

by the way I added the power on indicator, signal indicator, clip indicator and protection indicator.

when the power on, the two red light should be on, and when the circuit problem it will turn off the led protection as simbol as the relay not working.

what does it sounds like? please check the video on BARLEX RESPECTAIZER Youtube channel