Krell Duo 300 Stereo Amplifier Repair

Insufficient pressure between output transistors and heatsink prevented proper heat transfer. Output transistors overheated and and shorted. The thermal pads melted and stuck to the transistors and heatsink. The left channel shorted transistors and drivers where replaced, each and every semiconductor was checked and all output transistors were re-seated with thermal grease including the ones on the working channel to prevent them from failing just like the left channel did.