Well if I put the system on normal power and set the volume then change nothing but change to balanced its notably louder.. And seems to distort at least subjectivity( sign of increased gain?). I can't see any psychological reason for this, but alas maybe I am imagining it.
Can't you take a measurement?
Ray why do you use balanced power?
I had some mechanical transformer hum issues crop up with my (then) new (used) amplifiers. That can (as I read) be caused by even a small DC component on the AC. I stared at the AC coming into the house, found some issues. The Utility measured for a few weeks and then replaced the local transformer.
In the meantime I read up (as best I could) on AC power and Isolation techniques, and I looked at isolation transformers. It led me to balanced power, which would be a subset of isolated.
I read through the information provided by
Equitech during that time. A used balanced Equitech Q series came up on eBay for a price similar to what a new Triplite (unbalanced) would cost.
Shock City Studios was the vendor, replacing small units.
And here we are. All the transformers in the rack have gone dead silent, unless you use a stethoscope, and then the transformer hum is dwarfed by the hard drive noises in the cable box. The Equitech draws 7 watts when idle.
There
may be other effects, but I don't have instruments of sufficient sensitivity/noise rejection, to make any claims about that. Sounds good though, totally quiet, properly dynamic, no harm done, some help given. It went in, it hasn't come out.