I recently set up my setup again after a few years in storage (Fostex 168 Sigmas in corner horns, homebuilt triode monoblocks, Benchmark DAC2, Adire Shiva powered sub), and I'm having issues with a hum from the sub.
It's currently plugged into the same Surgex as the rest of the gear - have tried lifting the ground with a cheater plug, doesn't make a difference. Hum is there whether or not anything is plugged into the input.
Do plate amp caps tend to go bad? It seems to be working fine other than the persistent hum - rotating the phase control does seem to make a difference, so I have some more Deoxit on order to see if cleaning that pot cures it. Does anyone have any other ideas? Thanks!
It's currently plugged into the same Surgex as the rest of the gear - have tried lifting the ground with a cheater plug, doesn't make a difference. Hum is there whether or not anything is plugged into the input.
Do plate amp caps tend to go bad? It seems to be working fine other than the persistent hum - rotating the phase control does seem to make a difference, so I have some more Deoxit on order to see if cleaning that pot cures it. Does anyone have any other ideas? Thanks!