Could someone please provide me a link or an explanation as to why I would need a pre amp to run a new set of M80ti speakers? I'm about to buy a set and build my home Stereo system around them (I have no components yet). I found that many folks prefer to have a separate amplifier to power loudspeakers; however, I don't understand why this is done, if you can purchase a 5.1 receiver that has lots of power.

Any advise where to educate myself on this topic? My greatest concern is that I buy the proper components to let me power both loudspeakers; my input would be CD and Movies—nothing more.

Thanks in advance!