I think there is just less of a demand on the sonics of a multichannel setup, due to the nature of its existance, ands its natural ability to overcome lack of imaging or soundstage by adding speakers.
Instead of having two speakers running constantly creating a large soundstage and imaging etc etc, you have multiple channels. Why do you need imaging if the sound is coming from the proper direction?
I think the emphasis of High end theater is way too demanding, i think multichannel was designed so the average joe could have enveloping sound without all the needed speaker placement yada yadda. and i dont think multi channel was ever really intended for audiophiles, but more for the mass market?
sure, sacd and DVD-a are multichannel, but untill these came out, multi channel music was just logic processors attempting to overcome the shortcomins of bad accoustics and speaker placement, or to creat a "Wow gee" affect on consumers expectation of more is better
multichannel music probably woulda gone the way of the DODO if it wasnt for surround sound movies. However, its probably here to stay in some form or another because multichannel setups are becoming more and more common in households.
The multichannel cconcept is largly leaned twards movies, and it does not take nearly as precise speaker placement to get spectacular sound as it does with 2 channel.
If course, im not debating the fact that good equipment and well done placement with room treatments can make it sound better, however, i believe that the increase in sonics between a $1000 HT in a box and a $55,000 with good placement is far less significant than the difference in sonics between a $1000 stereo setup and a $55,000 stereo with proper placement and treatments.
Sometimes i feel like HT setup is just easier to obtain the great sound becuase you are dealing with sound effects, and have extra speakers to cover the shortcomings of imaging and soundstage,
Sometimes, i wonder weather or not HT was ever meant to be High End as 2channel was. Sometimes i dont think it was. if you look at the "how much does your system retail for" audiophiles have a trend of spending more on 2channel than HT. Sometimes i think comparing them is like apples to oranges.
its easy to get a HT to sound good. its harder to get a 2ch to sound good. Most good 2ch setups DO sound better than multichannel setups though.
just my humble opinion, no real research on this, just what i figure from noticing the sonic differences and main uses for stereo vs. multichannel.
Im just presenting some ideas that i have not really seen yet.
any thoughts?
Now, where the hell did i put that spell checker?