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
It think the absolute sound quality of a two channel system easily exceeds any surround system (assuming similar dollars spent) that I've heard, but when it comes to the home theater realm, the multi channel provides an experience that simply isn't the same with only two channels.

This may also apply to multi channel recording of live events, but it seems that this is another example where there is an element of experience that may trump absolute sound quality for some.

I've never heard an excellent two channel recording played on an quality system and left thinking something was missing. I've also never heard a multi-channel music recording that really impressed me, but I'm sure there are exceptions that would knock my socks off.

I guess I placed my vote when I purchsased an SACD player that doesn't do mutli-channel.
The notion that 2 channel is inherently better for music reproduction is ludicrous. A well recorded discrete 5.1 mix of the same content sound far better than the same material mixed in stereo. This is true even when you do the comparison on similarly priced MCH and 2 channel systems (in other words, you don't even need five identical speakers and amps to achieve this result). I have 50K worth of mains speaker, cable and poweramp, and a relatively modest 10K center, sub and surrounds (speakers + amps). In my setup MCH completely blows 2 channel out of the water. If I took this 10K and applied it towards an upgrade of my 2 channel system I would get a marginal improvement. I can only imagine how good MCH would sound if my center and surrounds were of the same caliber as my mains.

The reason no one is bothering with MCH music is pure and simple the lack of content, wiht the exception of classical.
I'm not sure why people are being so intransigent about this - any subjective scenario of this nature is neither right nor wrong. I know Robert Harley is a well known fan of multi-channel music but I hate it. Having music coming at me from all angles is as unnatural an experience as I can imagine. I am lucky to be able to have separate systems for audio and TV/movies. The latter is never used for 2-channel and I find stereo TV unwatchable nowadays, as the sound now sounds flat. That said, my surround system is a significant number of steps down in quality compared to my main rig. 2 for music and multi for TV but that's just me.
People who buy high end (uberexpensive) audio equipment almost always express distaste for the multichannel format. It seems to be part of their personalities. Liking multichannel disqualifies you as a "serious" audiophile.

Because of this it is no surprise that dealers do not promote multichannel music. To do so would label them as not serious audiophiles, and send the high end customers elsewhere to a dealer who will play along with their prejudices.
When you're in a concert hall (reflected) music is coming to you from all angles as well. A MCH system is better capable of recreating this acoustic environment than 2 channel. Of course, this is not the same as some old quad mix with guitars blaring from the surround channels behind you. Here I agree with you. I also hate most synthetic surround sound generated with a DSP from 2 channel sources. What I am talking about is well recorder discrete 5.1.

Subjective as this may be, I am 100% sure that if I played the same track in 2.0 and 5.1 in my system to 100 random listeners, >90% would prefer the 5.1 track. The simple reason is that it is closer to the live experience.