2. amps-preamps
  3. 147825-119821

Question about hum from speakers

I know there's at least one amp engineer here... I'd like some help.  I bought a used solid-state amp from ebay; the ad read " McCORMACK POWER DRIVE DNA-.5 Deluxe REV B POWER AMPLIFIER - EXCELLENT CONDITION!"
Well, I swapped it in, replacing a Dynaco Stereo 120, and there's a hum from both speakers.  I have to believe that the seller was well aware of the hum.  What I'm wondering is, is the hum a result of some electronic component(s) in the amp failing (or having failed), such that it's salvageable by replacing the bad component(s)?  Or would that be hoping too much?
bhakti-rider

Showing 1 response by gdnrbob

gdnrbob
4,485 posts
 
Since no one has said so, I would contact SMc Audio directly.
Pat or Steve (McCormack) can give you the best information. If necessary, they can either repair or upgrade the amp. They can also tell you if the seller sold you a defective amp.
B
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