Why is 2 Channel better than multi-channel?


I hear that the music fidelity of a multi-channel AV Receiver/Integrated amp can never match the sounds produced by a 2 channel system. Can someone clearly explain why this is so?

I'm planning to upgrade my HT system to try and achieve the best of both worlds, I currently have a 3 channel amp driving my SL, SR, C and a 2 channel amp driving my L and R.
I have a Denon 3801 acting as my pre. Is there any Pre/Proc out there that can merge both worlds with out breaking my bank? Looking for recommendations on what my next logical steps should be? Thanks in advance.
springowl
Most people have no idea how to go about setting up a good sounding multichannel music system, they also do not have the extra room it requires. As near as I can figure out from what I read on the internet, most people think Hometheater and multichannel music are the same thing, they are not and can never be to the audiophile. Forget the television, forget the baby center channel, forget the out of phase rear speaker types that are in many hometheaters, this setup is for movies and will never sound more than: FUN. As long as HT/MC music are grouped together in mind and system, two channel will get the audiophile nod as better.
I dont think i can accept the position stated above that by the very nature of the multichannel configuration , imaging constraints are aleviated. This is certainly just my opinion but quite the opposite is what I have concluded.....sorry. What I am getting at is that the adding of more speakers and channels of music contaminates the imaging without the meticulous protocol of proper integration . That trial and error journey has created some serious late night hair pulling sessions but breakthroughs eventually evolve . I understand Slappys thinking in that with movie soundtracks that rely on sound effects, imaging problems are ameliorated with the addition of more speakers but I evaluate multichannel strictly on music coherency and once you are somewhat satisfied with your work there , movies sound excellent. I agree with him that 2 channel smokes mullti in all but a few demonstrations I have been a part of { including ces shows } and that itself illuminates the issue of the great difficulty we are facing in mulltichannel integration.
Brainwater...Try to listen to Tacet DVD-A D107..Mozart Flute Quartets. You can't match this sound with any 2 channel system. Don't judge multichannel by inappropriately or poorly mastered discs.
Eldartford , I look forward to that opportunity and will make efforts . I agree wholeheartedly with you in that a poorly mastered multichannel disc cannot be salvaged by any means for the most part . The thrust of my observations about the difficulty in achieving coherency in multichannel sound presentation was just that : its difficulty. I am a firm believer in multichannel and by evidence of my investment in my "theatre " / multichannel setup , I am in this to win. Its just that Slappy is damn near correct in what he is saying. Note the word near. I keep stumbling into this scenario whereby frustration in the results keeps many from appreciating what a properly set up multichannel system can be like. I am a certified soundfield coherency freak and my relentless pursuit of perfection leaves me thirsty which in turn keeps me studying and experimenting. There is and has been a dearth of knowlege and readily available articles that articulate a definitive and widely agreed upon formula to once and for all settle the question of how to get sonic bliss in a multichannel configuration. Widescreen Review was one of the first to insist on ditching bi or dipolar surrounds in favor of 5 identical , equidistant { from listening position } full range speakers in the room. Equal speaker legnths were part of that equation I seem to remember as well as equal amplification . . These articles have been long forgotten by many as the magazine has been obsessed with video for a couple of years now but they did indeed lead the charge in advocating this setup. Its a near unrealistic goal as most simply cannot do much of it ; but we should try. I would not give up multichannel and done properly , can and does out perform 2 channel with good software. I like G Holts articles too by the way. Eldartford , what are some other good recordings in multichannel you like?