xy wrote:

I guess balanced power really centers on 60 cycle "hum" kinds of
things and crusty old tube guitar amps and stratocasters
etc...magnetic field hum stuff. I'd be trying to chase "hiss" with
the thing.

It fixes one specific hum source: chassis leakage. It doesn't do anything
about induced hums and ground loop problems, really.

But it really does help with that specific hum source.

Also, because it's a transformer, it also cleans up high frequency trash
on the power line, which can result in buzzes and radio interference
problems.

But it's a very specific cure for a very specific problem.
The bottom line, though, is that you should try it and see what it
does. Any of the power filter companies will be willing to loan you
a balanced power transformer on a credit card so you can hear what it
does for you.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."