On Wed, 03 Dec 2008 09:05:17 -0500, Bob M wrote:

While trying to connect wireless speakers for the Xmas season I noticed that
on the receiver end I get a distinct hmmmmmmmm. I tried different plugs
and turned off all the fluorescent lights I could find. Still there.
Also I don't think any appliances and/or chargers were functioning at the
time either.

Can some of you please suggest what other areas I might check?

Since they're wireless, I assume there's a receiver and a transmitter?

Could be a ground loop at the transmitter. I would try flipping the
transmitter linecord 180 degrees in the socket if its not polarized.
Make sure its in the same duplex outlet as the audio source or at
least on the same circuit. As a test, just plug it in and disconnect
any and all connections to the audio equipment.

Then unplug the transmitter. If the hum is still there its the
receiver's fault, its either a bad receiver or a bad receiver design.
I'm assuming there are no other wires going to the receiver, just a
line cord.

If the hum goes away when the transmitter is unplugged, and there are
no other audio connection to it, then its a fair guess the transmitter
is at fault and again, thats the way it works, badly, or is broken.