I was in a car wreck years ago .To make a long story short my capacitor(coil ) that charges up for the high tension spark plug outputs had come loose so it wasn’t connected either .It continued to work even though it wasn’t connected for about a year and then finally stopped working .When the mechanic saw it he showed me what had happened .Tge spark had jumped the gap to the capacitor and completely eaten away the top of the coil,nothing left .It used50,000 volts since it was for the high tension lead on the car .So no surprise rthat the amp still worked even though the speaker wires were not all connected .
Audio Research D400 mk2
Recently when powering up/down one of the 4 big caps under that big board arcs ( light blue)for a few seconds. The amp will power up ok and it stays on and sound great. If I just touch that area I hear a spark. I pull plug to power in/out as the switch seems to make it sound louder. Audio Research does not have caps anymore and say they will need to retrofit and replace that main board to connect to all wires , etc. under it. They say not o use it even though it powers up as normal ( less the spark, arc) for a few seconds or so.
Any thoughts as they say about 2 Grand to replace all for caps and rewire with a different board . Not including shipping.
Where's Leonard these days as he'd have a FIT.
Thanks George ( It Still sounds Good)