> Depending on the crossover frequency and the slope of the filter, there
 > should be little need for the sub system to be duplicated for every
 > channel. Dolby's cinema surround system has evolved to the single sub
 > idea over a number of designs, the early 70mm version having two sub
 > channels in one configuration. The 5.1 works very well with little
 > compromises at all in bass directionality/locations.
 >  Your experiments with the sub in the kitchen show h/ow "uncritical" sub
 > placement can be to get by generally. Control of room nodes, and such
 > is another matter though for truely accurate critical listening and
       The crossover point will be another matter, completely. Presently I am 
using sat speakers for my rear channel that die a quiet death at about 80 to 
100 Hz. They are mounted to the down slope of the cathedral ceiling (nicely 
out of the way) even with the listening position about three feet from the 
rear wall. I have angled them facing to the rear and back up at the ceiling 
at 
about a 60 degree angle, where they deflect off the ceiling first, then the 
rear wall before arriving at the listening position. This has worked very 
well 
and eliminated having to play with the delay control of the Pro Logic almost 
entirely and defuses the rear channel sound very effectively. I will have to 
replace these sats (Bose Model 100s..... I know, I know....Bose, how could 
you?) (Because I got them for $50.) with full range speakers. I didn't want 
monsters sitting in the rear corners, nor can I suspend 200 lb. beasts from 
the ceilings, so I have decided on a mini-monitor set with 7" Eaton Kevlar 
mids and tweeters matching my mains and have shown themselves to be very 
enjoyable to listen to. They advertise a 40 Hz range, and so far all their 
products have surpassed all their specs. This will work extremely well with 
the 40/50 Hz crossover for the sub. The mains are advertised down to 17 Hz, 
but I have had no accurate way of measuring that low. We checked them down to 
20 and they came through with very strong performances. 
   So I began with the sub at 80 Hz knowing I would probably go lower. I was 
surprised how terrible the whole system sounded at 80. For music, 40 worked 
the best and was very quiet when there was no bass below the crossover 
(something I was insisting on) and 50 Hz for movies. Again, I was surprised 
by 
what the 10 Hz setting difference made in the material!!! T2 went from an 
immediate Yuck to a long Ahhhhh.
   So I was very concerned about crossing the sub at the advertised limit of 
the rear channels I had decided on. I was afraid of missing something between 
the two (the sub and the rear channels) and thereby loosing the entire 
advantage of the Dolby 5 & 1. It would appear now that I should be right on 
the money and I am anxious to try it out (still saving for the sub), with the 
sub placed behind and to the right of my main speakers. The summed bass 
choices of the 5 & 1 systems will be an interesting experiment considering 
the 
set up and limits. The 30 day trail period is a life saver for just such 
situations. I cannot imagine buying one of the shake and bake Home Theater 
speaker systems with everything selected for you. There are so many unknowns 
involved. Especially room sizes, shapes, furniture, etc, I cannot see how 
anyone could expect to get optimum quality with the plug and play approach.
Cheers, John
--- AdeptXBBS v1.07f (Registered)
---------------