2. amps-preamps
  3. 1016485698

Amplifier Hum

Hi, I have a Parasound HCA 2200 II that has started to make a humming noise. The noise is coming from the amp itself not the speakers. It just started doing this but still seems to function fine. Previously it was dead silent. The amp has about 3 years of use on it. My question: Is it time to sent to Parasound for a tune-up or is there somthing I can check myself? (the amp is not under warranty as I'm not the original owner) Any help would be greatly appreciated.
Thanks
skeevay
amwarwick
40 posts
 
I had the same thing happen to me on a McIntosh preamp and turned out to be a faulty power transformer. They replaced that and no more hum.
Post removed 
sugarbrie
3,854 posts
 
Sometimes amps hum when they don't know the words.
jjwinterberg
45 posts
 
Craig,

My DNA-2 transformer hums also. I've found that it only hums when one branch circuit in the house is turned on. The circuit is controled by a dimmer/timer. I'm not sure how exactly this might help but try and see is there is any correlation between the DNA hum and other circuits being on. BTW I'm getting my amp upgraded soon, please tell me it's worth it.

John
garfish
1,840 posts
 
John; Yep-- the upgrade is worth it, IMO. After upgrade to Rev. A the amp has an incredible smoothness, liquid character, and naturalness that could be described as "tube-like" in the mids and low treble, but it still has the quickness and bass control of a big McCormack amp. Very musical. Cheers. Craig
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