Will this isolation transformer limit power draw?

I can find this information on the datasheet:

802-GIS-500 Isolation Transformer
Input 115
Output 115
Amps 4.35
V.A Cap. 500
Wt. (Lbs.) 16.0

I suppose I will have to call Stancor to find the figures you mention - I'm not sure what V.A. Cap. is...

Sooo,

is it a valid, non-stupid, non-deluded audiophile smoke-and-mirrors trick to use an isolation transformer (or a balanced transformer, perhaps) to minimize a slight humming or buzzing sound (ie lower the "noise floor") emitting from my speakers with the Bryston?

What would be better, just plug it to the wall and deal with the noise? I've already used the ground lift switch. My interconnects are all properly grounded at the source side, and my receiver did NOT produce even the slightest bit of noise (the Denon 3803)..

What other ideas would work to rectify the problem?

I did this test last night

With the Bryston powered up and connected to the speakers, without any inputs, there is a low-level hum/hiss from the tweeter and midrange of my speakers!

Also, now mind you this is a 19 year old amp, the transformers emit a fairly loud humming noise (audible out to 10 feet away) when plugged in, even with nothing connected!

I figured, from reading some posts, it's either a ground loop hum, or it's 60Hz hum from the AC line. My understanding is that a balanced or isolated power line may solve this problem. If a balanced transformer doesn't address line noise, then what the heck is it, good for nothing?

I've also decided to send the amp back to Bryston for service, but I'm not sure they'll agree with me that something's wrong with it! I'll have to see how that goes. The amp will be shipped out tomorrow or the next day...

Thanks for the input, everyone!

I'd be happy to solder in some new filter caps. I'll pop open the case and take a wild guess on where to find them... :) I'm getting bolder with my soldering iron in any case...

Thanks again!