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RE: Help me make sense of this

Posted by AudioDwebe (A) on December 24, 2020 at 17:18:10

In Reply to: RE: Help me make sense of this posted by Sondek on December 24, 2020 at 14:46:33:

They're on the same circuit.

Checked polarity, both outlets used are good. Disconnected preamp and the monos were quiet as could be. So I figure the problem now is elsewhere.

Disconnected everything from the preamp, connected it, buzz. So now I'm thinking it's the preamp.

I swapped preamps, Still buzz.

So now I'm thinking its the 25 foot balanced ICs connecting the pre to the amp.

I then brought the same pre up to the amp and connected it using a pair of RCA ICs. Still buzz.

So now I'm thinking it isn't the ICs after all.

I tried lifting the ground on the power cable used for the pre and still buzz.

I reconnected the original pre and components.

I generally turn on the pre before the amps. This time I turned the amps on first and I got buzz. Preamp was off.

It seems like the RCA connection on the amps are possibly the reason for the buzz. But I have no idea why this is. Also, if I connect a cheater at the end of the power cable going from the amp to the conditioner it removes the buzz.

I ordered the Ebtech Hum X since lifting the ground on the amps power cord removes the buzz.

This makes zero sense to me.




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