Is yours a stock unit? I didn't think the 502b had pre-outs. Does the hum come from both speakers or just one side?
Hum from new Jolida 502B-Help
Just set up a new Jolida 502B and have a bad case of hum all of a sudden. Are they that sensitive? I've heard the humbuster from PS Audio may help. Any ideas, comments? The hum is now audible in my powered sub hooked up via pre outs on the amp.