It not the caps, that would just make a mild hum and they all look in good condition. An amp this old is unlikely to have cap problems. This is a loud open circuit sound, like if you (very stupidly) remove one rca while the amp is on, like I've done on other amps on occasion. I was worried for my speakers it was that loud.
McCormack DNA 500 loud hum
So I just picked up a McCormack DNA 500 and the damn thing just hums loudly in one channel when coupled with my cyrus preamp. I took it in and the tech said it's because the rcas aren't grounded as they enter the same Jensen transformers as the balanced connection, this can result in really bad humming. He's going to ground them but I just can't believe that I can't run this amp stock with my cyrus preamp? That preamp shouldn't have any problems with this amp. Any one have detailed knowledge of these a,ps that can guide me or my technician?
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- 11 posts total
- 11 posts total