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
And let's not fixate on the surround or rear channels. The center front is the most important of all.
Eldartford,

Let me state the obvious...it all matters

and you're preaching to the choir
Most people that have opinions on multi channel sound have for years enjoyed the joys of a stereo 2 channel sound system. The well known illusion of a sweet spot can only be effectively realized with a stereo sound. Multi channel sound somehow disrupts the nature of the sweet spot with the extraneous signals from the center and surround channels. Multi channel sound also affects the soundstage and depth of a musical presentation. The presentation of a sweet spot and a 3 dimensional sound is replaced by the sense of being in the midst of a musical rendering when listening to a surround system. For movies, the extraneous sound from the other channels may prove exciting and in some cases necessary to enhance the vocal presentation of dialogues amongst performers. There is no need for a sweet spot to be maintained but rather move the sound where the action is at various times throughout the movie presentation. Most audiophiles that I know of who have a surround system also have a dedicated two channel, stereo only system. The sweet spot is a phenomenon that stereophiles experience with stereo sound and arguably contend that it is a better sound.
The well known illusion of a sweet spot can only be effectively realized with a stereo sound.

Landok, you have never heard a properly setup multichannel system, not only does a multichannel system have a sweet spot there's actually information coming from it.

Fact is you can adjust the sweet spot to you liking with surround. Surround is very misunderstood
velocity,
I agree with you that surround sound is very misunderstood but above and beyond that it is also over rated. Although one can meet all the required parameters in setting it up properly, there is no guarantee that the recorded multi channel signals will consistently adhere to your perceived proper set up. There are just too many signals coming through. One will also take into consideration the limitations of the listening environment. Are bigger rooms better for surround sound or a small, regular size listening room be just as effective? The idea of being able to adjust the sweet spot to your liking hints at creating imbalances within the system. To do this one has to achieve an equalization of signals to achieve the sweet spot phenomenon. I don't know of many audiophiles that routinely go through the equalization process to achieve a traditional sweet spot.