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rupertn
rupertn's picture
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Last seen: 1 year 8 months ago
Joined: Nov 21 2011 - 6:45pm
Variable hum

I'm getting a hum...

AMC CVT 2100a valve amp, Zu Druid speakers, iDAC, Apple TV.

I disconnected all sources, removed them from amp, then powered up amp, with speakers connected and got a low volume buzzing hum.

Then connected iDAC, powered up, and got a lower volume hum with out the buzz.

Tried different wall sockets and surge protectors, made no difference.

Switched out amp for a friends, no hum with all the same sources.

I've read on other posts about upgrading powerchords. The manual says "if there is a hum make sure power is grounded via power cable", but, doesn't say if this is anything different from simply having it plugged in...

Recommendations? Should I get the internal grounding checked out?

 

Thanks

JoeE SP9
JoeE SP9's picture
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Last seen: 1 week 4 days ago
Joined: Oct 31 2005 - 6:02pm
Hum/buzz

If you get a hum with only the speakers connected that would indicate there is a problem with the amplifier.

Did it always hum/buzz or is this something new?

rupertn
rupertn's picture
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Last seen: 1 year 8 months ago
Joined: Nov 21 2011 - 6:45pm
its something new

its something new

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