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Humming sounds  


Kingsanguine
(@kingsanguine)
Active Member Registered
Joined: 12 months ago
Posts: 16
Topic starter  

Hey everyone,

I have finally got the speakers, amp, pre amp, up and running.

But now....I keep having this humming 60 hz sound from the speakers.  I have a sys volume control and the hum gets louder the higher the volume goes.

I also have a pre amp mani. I have tried messing with the gain and it helps a little but its still there. 

I have a ground running from the turn table to the mani and I have tried messing with that and still nothing.

I'm at a loss.

I built the ESO 7 baffle speakers and the ice amplifier.  Any solutions would be greatly appreciated.  

Update: I moved the equipment around and now it's worse with 120hz...

Thanks


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TVOR-Ceasar
(@tvor-ceasar)
Honorable Member Moderator
Joined: 2 years ago
Posts: 555
 

That's power line noise, mostly from a power supply (60Hz) and it's rectification stage (120Hz), thereabouts. I'd say it's pretty early on, too, since it changes with the volume control. Instead of writing it all out, I'll refer you to the way I troubleshoot such things in this post. If you substitute your signal chain in to the ideology put forth, you should be able to narrow it down pretty quick.

Let us know what you find.

-Charlie
https://www.youtube.com/user/TheTrueVoiceOfReason


123Toid liked
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123Toid
(@123toid)
Illustrious Member Admin
Joined: 3 years ago
Posts: 1185
 

@kingsanguine Have you tried plugging them into a single powerstrip that goes to one outlet?  That may help. Could you also enlighten us on the cabling situation.  Is it possible you don't have shielded cables?

https://www.youtube.com/123toid


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Kingsanguine
(@kingsanguine)
Active Member Registered
Joined: 12 months ago
Posts: 16
Topic starter  

@123toid

I have given up on my 60hz humming sound and I cant figure out whats causing it. It could be anything. Ive tried for several weeks now.

I have:

Audio Technica lp 140 turntable

ES07 baffle speakers

Schiit mani pre amp 

Schiit sys volume control

The ice power amp 

 

Atempts

I bought a ground loop isolator (ice cube xlr) (maybe this was the wrong ground loop isolator?) Still humming

I change out the ground wire size.

Still humming 

I plugged it in the same outlet and different outlets.

Still humming

Tried messing with the gain on the pre amp

Still hums

Bought a noise filter power strip

Still humming

The humming will only stop when I unplug the turntable.

For some reason I am not able to upload other pictures here. This is the only one I could get from my old photos posted of the mani and volume control.

Would using a cheater plug on my turntable be dangerous?

15860383933563706587965153457691

 


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TVOR-Ceasar
(@tvor-ceasar)
Honorable Member Moderator
Joined: 2 years ago
Posts: 555
 

See response here.

-Charlie
https://www.youtube.com/user/TheTrueVoiceOfReason


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Newegg

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