Power Amp transformer hum - intermittent and increases and decreases in a few seconds

Checking to see if anyone can tell me if blue circle power pillow or emotive cmx-2 can solve my hum issue. Or is there something else I should be liking at?

john_simp03-11-2019 3:40pm

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jea48 Details Discussions Posts This discussion Message User 4,486 posts 03-12-2019 at 01:03am Copy Comment URL Report Comment Edit Delete don_c55826 posts 03-11-2019 4:16pm My Pass Labs XA60.5 never buzzes and it has Toroids. Just a guess because Pass Labs incorporates a DC blocker in their power amps. Bryston does...... https://www.diyaudio.com/forums/power-supplies/161428-variations-dc-main-filter-buzzing-toroid-trans... .
helomech Details Discussions Posts This discussion Message User 1,715 posts 03-12-2019 at 02:30am Copy Comment URL Report Comment Edit Delete Mechanical hum is not always the result of DC offset. I have some DC offset on my mains and even two DC blockers in series couldn’t eliminate an obnoxious hum in one of my amps. Anyhow, I own the CMX-2 but found the Audio By Van Alstine Humdinger works far better. I had a bucking transformer that still hummed loud when plugged into the CMX, but it ceased completely with the Humdinger.
firstnot Details Discussions Posts This discussion Message User 248 posts 03-12-2019 at 03:28am Copy Comment URL Report Comment Edit Delete Try a cheater plug.
testpilot Details Discussions Posts This discussion Message User 960 posts 03-12-2019 at 12:12pm Copy Comment URL Report Comment Edit Delete Try a cheater plug. A cheater plug should only be used to help diagnosis if you have a ground loop problem. It is not a solution as it poses a safety risk.
john_simp OP Details Discussions Posts This discussion Message User 24 posts 03-12-2019 at 12:45pm Copy Comment URL Report Comment Edit Delete Agree. I did try a cheater plug to no avail. Thx to all for their input. It is much appreciated.

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