Amps Specs Defined

[MatrixS2000]

Those are balanced inputs. Most people are familar with unbalanced RCA connections where the postive signal is on the centre post and the negative is on the sleeve. Balanced connectors have 3 connections. A +, - and ground. It's advantage is that it can carry a higher level signal and that an amp with balanced input should not have any hum.

Amplifiers are a pretty big discussion and all that most people look at is how much power the amp can make.

Here is a good page defining what all the specs mean.

Post back if you have any specific questions.