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
To tell the truth I love 1ch over 2ch. I always prefere to buy mono version of a record and might be planning buying mono cartridge when I accumulate large enough mono collection.
Hey guys- Except for one response above, it seems that everyone missed the point of Springowl's question. He's currently using his HT receiver as a pre-amp only, driving 2 and 3 channel amplifiers (separates). His question, I believe, is "can he purchase a HT receiver that will give him as good, or better sound that his current hybrid setup", or should he upgrade to a complete separates setup (high-end preamp with fixed gain HT bypass input, HT receiver for decoding multi-channel mixes, plus separates for amplification be it one, two, three or more channels in the amplifier.

Or, ultrahigh end multi-channel processor (Proceed, Meridian, etc.) instead of the HT receiver and high-end preamp combo. That is his question IMHO.

I don't know the correct answer but I'm about to look at the Proceed AVP-2 processor- preamp combo, which should be upgradeable, in the near future, to digitally decode SACD now that the fire-wire transfer scheme has been agreed to.
@ channel is better than multichannel because multichannel has a stronger need for a sweetspot for listening. 2 channel sounds better than multichannel when you are cleaning the rumpus room or working on stuff.

As far as 2 channel better than Multichannel HT i dont believe that it can really be said.
Music and theater are apples and oranges, they both feed ya, but they are different.
Besides, for 7,000 you can get a better sounding HT than your local 9 dollar-a-ticket cineplex.
Can't say which sounds better, depends on the recording I guess. I don't have a whole lot of multichannel recordings yet, but of the ones I do have, some are much better in multichannel and some are much better as two channel in my system. I think my opinion may be a wait and see type of thing. I know some people like old mono albums and say they should never be mixed to stereo, could be the same thing with two channel recordings. Rock music such as: Beck, Frankie goes to Hlooywood, Mike Oldfield, Pink Floyd, Alan Parsons, Moody Blues, Grateful Dead are some that I have that sound much better in multichannel. Lyle Lovett (Joshua Judges Ruth) is much better sounding in surround and so is Alison Krauss and Union Station Live. Norah Jones, Diana Krall, Natalie Cole and another Alison Krauss I have sound good in both and depending on mood and whats going on, I seem to play both ways. Lots of stuff I would like to hear in surround some day: Dead can dance, Michael Hedges, Brian Eno, Enya, Peter Gabriel, leo kotke, all the pink floyd stuff. I guess there may be no correct answer as to which sounds better or works better as it would be a matter of the type of music which may lend it's self to one or the other, or both even. It's a great time to be an audiophile.