I am new to the forums and high end seperates. I purchased a mac 162 amp off of ebay. I am using a sony reciever for a preamp. I was in a hifi store and the clerk said I was not appreciating the full potential of my mac because the reciever probably has no output voltage.

My question is does output voltage on a preamp make a big difference? and if so why?

I have seen some pre's have different output ratings 2.5,1.0 etc...

Is my sony good enough for a preamp?

I guess its more like a few questions.
Any help on the subject would be great.