PS Audio makes a "humbuster". It appears to be a DC blocking device and is reasonably priced (ay least as far as can be said for an audiophile component). PS Audio claims it will quiet mechanical transformer noise. They are designed for high power loads so a power amp should be OK. Maybe a dealer would let you borrow one to see if that does it.
How to see if there's DC at my AC outlets?
Can I simply take a voltmeter, set it to DC, to see if there's DC on my AC lines?
I have Joule Electra monoblocks with an external variac, and it has a tendency to hum / buzz rather loudly at times. I am wondering if its related to DC being present at the outlet. It's not due to ground loops, that I can tell.
Thanks!
I have Joule Electra monoblocks with an external variac, and it has a tendency to hum / buzz rather loudly at times. I am wondering if its related to DC being present at the outlet. It's not due to ground loops, that I can tell.
Thanks!