When I say reciever, it's what's recieved the balanced signal (inside the chassis of the amplifier), the signal has already travelled from the source and inside the reciver it inverts signal- just before it sends it through it's amplified stage.

So, to make sure we're on the same page. Source takes 1 waveform, and sends down signal+ and source takes inverse and sends down signal-. The difference in voltage occurs because as signal+ increases in voltage, signal- decreases in voltage and vise versa. This also means you have equal and opposite voltage. Then inside the amplifier is when signal- is inverted, the two signals are summed, and the noise will cancel as it hits the opamp that does this because the noise will be equal but out of phase, not because it entered the lines out of phase, but because the opamp puts them out of phase all on the recieving end. This sends a single ended unbalanced signal through the few inches of copper on a circuit board to the amplification part of the amplifiers circuitry.

What is the difference between balanced and differential, I've always read and been told the terms are interchangeable.

The book "The Audiophile's Project Sourcebook" has an entire chapter on how the opamps manipulate the signal, how to make your own baluns and transformers and breaks down how both balanced and unbalanced signals work. It's a good reliable book that is way more accurate than alot of what is on the internet. There are many others, but that one breaks it down very well.

If you want me to do any direct quoteing, it'll have to wait until sunday when I get home.

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