2. amps-preamps
  3. 1243000730

What does this tell me?

I've got a buzzing issue that I'm trying to track down, here's what I know.
(FYI, my amp is an integrated)

~It's only coming out of the tweeters of my Vandersteen 2ce's.
~It happens regardless of the source, DVD player, Squeezebox or DAC.
~It only happens if I select an input that has a source connected to it. ie, if I switch to an input that has nothing connected to it, there's no buzzing.
~I've tried every input and they all buzz when something is connected to that input and they all don't buzz if there's nothing connected to that input.
~I've tried different power cables and IC's, they don't change anything.

I don't know where to go from here. Is it the amp? Is this a ground issue? What do I try next?

Thanks,
E-
ecruz

Showing 4 responses by ecruz

ecruz OP
402 posts
 
I unplugged the sub, still noise. I unplugged the Power Wedge with the tv, &
satellite receiver, still noise. I took a radio tuned to about 550kHz and walk
around with it, whenever I got near the side of the rack with the amp, Oppo and
Squeezebox, it went nuts. I then unplugged the Squeezebox, still noise. I then
unplugged the Oppo, still noise. All that leaves is the power cable going into the
amp, the interconnects going into the amp, the speaker cables coming out of it
and the amp itself.

I guess I'll try re-routing cables and see if that makes a difference. And I'll try
Samhar's idea of the two prong adapter.

Thanks for all the input, keep it coming.
ecruz OP
402 posts
 
It's a dedicated 20 amp circuit, with two outlets about 8 feet apart. It was
installed by my dad, who is an electrician.

One outlet has a TRL power strip plugged into it. Into the Power strip is the
Squeezebox, Oppo DVD player and Behringer DEQ. I have a Krell integrated
plugged straight into the wall.

The other outlet has Power Wedge power conditioner plugged into it. Into
that conditioner is a plasma tv, satellite receiver and sometimes a playstation.

I also have a Vandersteen sub plugged straight into the second outlet.
ecruz OP
402 posts
 
The interconnects are not disconnected. The source that the interconnect is
connected to, is unplugged from power.

The only time there is noise, is when an input is selected that has something
connected to it, whether there's power to whatever it's connected to or not.
ecruz OP
402 posts
 
I think I've got it cured, although I'm still not exactly sure what was causing it.

I unplugged the Squeezebox from the wall and disconnected the ethernet, still buzzing. So I decided to disconnect, reroute and reconnect everything. I tried to cross lines as little as possible. That helped, but there was still a little noise, not as bad, but it was still there. I then remembered, I have a power cable with a choke. I installed it on the amp. Viola! No noise at all, gone! Finally.

Not sure if the amp was generating the noise or if it was just picking it up. I'll live with this for a few days and see how it goes.

Thanks everyone for your help.

E-
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