2. amps-preamps
  3. 1163870968

Loud Hum from DNA 0.5

I just had my DNA 0.5 serviced at McCormack Audio for a blown capacitor. Now that I have hooked it back up to my system, there is a loud hum in my speakers. This never occurred before. It doesn't occur if I unplug the preamp input cables and changing the outlet didn't make a difference either. I even tried another set of interconnects and that didn't make a difference either.

The preamp is a Yamaha AV receiver and it has no known issues. I have no other amp available to me right now to hook it up to verify that only the DNA 0.5 is causing the problem.

I'm hoping someone here can make suggestions. Where the amp is being used is not my primary residence. I use an integrated amp at my home and have no way of testing this in my personal system.

Thanks!
taylormade2

Showing 1 response by audphile1

audphile1's avatar
audphile1
5,443 posts
 
so that hum noise was THAT LOUD????
I had the same issue within my setup. It was humming because of the cable tv coax cable, but it wasn't that loud. Anyway, look for ground loop isolator. 1 example is the Mondial MAGIC(Mondial Antenna Ground Isolation Circuit) box. YOu can find similar products cheaper. I bought this one sometime ago.
Doesn't degrade the picture quality on my Hi-Def and the hum is completely gone.
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