2. amps-preamps
  3. 1266784873

Ground source hum

I have isolated the source of my ground hum to be between my preamp and amp. This was through a process of trial and error and revealed quite surprisingly that for once Comcast was not to blame

I currently have a ground cheater plug attached to the pre-amp (bad). My pre is the Benchmark Pre-Dac ad my Amp is an ATI 6012. What are my options to permanently fix this problem. With the cheater plug in place there is absolutely no hint of hum what so ever.
Thanks
extra_action

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extra_action OP
52 posts
 
Turns out the fix was a little more straight forward. I use a Power Wedge 116 for power distribution. I had the Pre and Amp connected to the same outlet section. Switching the pre to a different outlet dropped the hum by at least 75% (only noticeable at less than 12" from driver). I suspect the remaining hum is as Ojgalli suggested, EMI between the Amp and crossover. I will try to move those further apart and see what happens but even as is, the hum is fine.
Thanks for the compliments Ojgalli
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