Denon POA-8000

Thank you for your kind reply.

I already sold them and have now bought Pass mono's.
It's (the POA-8000) a very complicated amplifier (feed forward, sliding bias) and with many parts.
You need a lot of technical knowledge yourself or find a very skilled technician to service these amps.
The inputboard at the back of the amplifier should have gotten a aluminium protection foil against the heat of the heatsinks.
Well with the PRA-6000 (nice pre-amp for phono) I had a beautiful setup but things do end...