if you'd like to know more about pro-amps, have a look at this very instructive forum thread:
http://forum.blu-ray.com/showthread.php?t=141383

have a look at the link in my signature.
those 2 pro-amps you see below the monitor have excellent sound, lots of power, run cool, cost little compared to "audiophile" amps (no 1.5 inch thick CNC aluminum front panel or lead added to the bottom plate) ; the build is "like a tank", the looks are good, and i don't hear the fan as soon as weak sounds come out of the speakers.

i just measured the noise level in my HT room;
2 pro-amps "off": 33 dBA
2 pro-amps "on" : 35.6 dBA

Last edited by J. B.; 09/01/12 05:49 PM.