M-Audio AV40 buzzing

B

Braamer

[H]ard|Gawd
Joined
Jun 28, 2004
Messages
1,688
I'm running the AV40s off a Xonar DG, and I get a constant low-level buzzing or humming, even when muting audio from the computer. Sound through my headphones is perfect, so is there anything I can do to eliminate the hum from the AV40s?
 
It's either a ground loop, or interference through dirty power. If it is a constant hum then it is most likely a ground loop though. You can try a ground loop isolator and see if that fixes things.

I have a similar problem with my BX5a's, but the sound remains even when my speakers are unplugged from the sound card so in my case it's dirty power. I have yet to buy a filtering power bar to try and fix it.
 
I plugged them into a separate outlet, and still have the issue. The buzzing is there when it's disconnected from the sound card, when the computer is muted, or plugged into a different outlet. The only time it goes away is when the right speaker is unplugged from the left speaker.
 
Bring the speakers to a friends house and see if it still makes that noise. Will tell you if its the speakers or voltage ripples in your house wiring.
 
I had a similar issue on my KRKs. They would buzz through both audio interface and headphone/speaker jacks on the desktop, but would have clean sound on my laptops headphone jacks. I had another interface with balanced outputs, and that fixed it for me. Probably not the solution you're looking for though. Amplified monitors are pretty sensitive to interference.
 
T_K said:
I had a similar issue on my KRKs. They would buzz through both audio interface and headphone/speaker jacks on the desktop, but would have clean sound on my laptops headphone jacks. I had another interface with balanced outputs, and that fixed it for me. Probably not the solution you're looking for though. Amplified monitors are pretty sensitive to interference.
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That's an idea... I'll run them through my laptop to see if that helps narrow it down.
 
I have the same set of speakers and no noise at all. If they make the noise at a friends house then get them replaced...

Also I replaced the stock cable (the headphone to RCA cable) with a much higher quality one.
 
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