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In Reply to: RE: speaker buzz posted by acres verde on January 28, 2010 at 13:03:20
Is the buzz through the speakers or internal to the amps?
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It is a distinct, steady state buzz coming through the speakers. The amps, (OTLs, by the way) are silent. Sorry I didn't respond sooner.
No worries. Remove the inputs from the amps and see if the buzz is still there. I suspect not. If it is, then there's a problem with the amps. If it goes away, you'll have to keep working your way back up the chain till you find it. Let me know.
I failed to mention in my last response that floating the grounds of the powercords to the two amps provides no relief either, so I've probably answered my own question about a ground loop buzz.
Paul, the speakers buzz with the pre amp outs disconnected from the amps. However, when I borrow and substitute the same brand of amps into the system, the speakers still buzz and at the same amplitude. Likewise, when my amps are substituted for his into his system, my amps and his speakers are dead quiet. I run my system all balanced. A 10 meter run of ICs connects amps and preamps. I don't know if this is germaine in any way but I thought I would mention it. I'm wondering if I am experiencing some kind of ground loop. Incidentally, each outlet feeding the amps is dedicated and is fitted with your Power Ports.
Can't have a ground loop if there's nothing connected on the input. Did you in fact disconnect the preamp from the amps at the amp side? If so, then we have a power problem which we may be able to help with.
Correct. I get buzz with no inputs connected to the amps. All it takes to get this buzz is to have the amps turned on and the speaker wires hooked up. Floating the ground on the power cord to the amps changes nothing.
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