Buzzing sound even without source plugged in.

Demoninja · 1320

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Offline Demoninja

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on: March 17, 2015, 09:41:32 PM
Hey all, I'm back again. I managed to resolve my previous issue with not having audio in one side and the amp worked perfectly for a month or so. Recently the amp started buzzing. Nothing changed as far as I know, it just started out of nowhere. Any recommendations on where to begin troubleshooting?

Edit: So I believe this humming is related to voltages, I had a pair of headphones plugged in and I turned the amp off and the buzzing got noticeably louder until it went away. Before that the buzz would be consistent. I usually have it plugged into a power strip and when I plugged it into the wall directly I heard the buzzing even after the amp was turned off for quite a bit, maybe 2 minutes.
« Last Edit: March 17, 2015, 09:50:05 PM by Demoninja »


Offline Doc B.

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Reply #1 on: March 18, 2015, 05:50:00 AM
Sounds like a loose ground connection somewhere in the amp. Probably time to go back under the hood and reflow some solder joints.

Dan "Doc B." Schmalle
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Bottlehead Corp.

Offline Grainger49

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Reply #2 on: March 18, 2015, 07:02:00 AM
There is a sticky for the ground terminations of the Crack.


Offline Demoninja

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Reply #3 on: March 25, 2015, 11:11:28 PM
Sorry for the delay, I just measured all the ground spots via the sticky that Grainger49 graciously put together. Unfortunately all of them measure out to a solid 0. I'll probably reflow them anyway but if my measurements are accurate then this might not be the problem. I'll edit this post in a few minutes with an update.


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