![]() But my gut tells me it is something upstream from the amp. Is the hum there when sources are playing, but muted? (that helps troubleshooting) If so, maybe start disconnecting sources and see if you can narrow there it comes from. (i spent a few $k running all new power lines to my HT area to fix my hum and that wasn't the problem. Powered by Xenforo, Hosted by Nimbus Hosting, Original design Critical Media Ltd. is owned and operated by M2N Limited, company number 03997482, registered in England and Wales. It might be ground problems but it might not be. Europe's busiest forums, with independent news and expert reviews, for TVs, Home Cinema, Hi-Fi, Movies, Gaming, Tech and more. ie, it wasn't the tube amp that was adding the noise. Using my NAD amp i couldn't hear it (it filtered it out), using my tube amp i could still hear it. When the PC is fully rocking (also over clocked and mod'd) it created noise (EMI? coil whine?) that flowed thru the HDMI to the TV to the AVR, etc. I had the same issue with my tube amps and audio from my gaming PC. Are you sure it is because caused by the addition of the new amp? It could be that it was always there and your old amp did a good job of filter it out.
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