I think the OP is talking about 2-ch music, hence the thread title. Not movies.
He probably has a dual-purpose movies/music system; and wants LFE during 7.1 movies, and stereo bass during 2-ch music.
or if he's like me, he wants tri-channel bass during movies...
Originally Posted by Red99
I posted the first response that there isn't stereo bass. (As far as 2 sub woofers goes). Unless you have some ancient system and playing the subs off a full range channels.
ancient or new-and-expensive, I believe there are several products capable of stereo subwoofers these days:
Trinnov, Datasat, and probably Classe/McIntosh and possibly now Emotiva with their XMC-1(?)
Now whether or not they do it properly, or even well, is another question altogether...
In any case, here is how I do tri-channel subwoofers (i.e. stereo subwoofers and LFE)
Mine is dynamically routable, I can change it on-the-fly to any combintorial of mono LFE, left, right, summed or tri-channel discrete.
The Oppo 105 acts as my 7.1 bluray DAC and also 2-ch music DAC. (There is no AVR or SP in my system, it's all external boxes and mostly Class-A analog. Or it could be 100% analog, if I wanted it in that mode; as-is there is a digital XO/EQ ADA in line for the LCR and subs.)
The output stage of the amplifiers are mostly Class-A/B with a few exceptions (in case you are unfamiliar / wondering.)
I have WAY more than 3 subs, and my room/speaker placement is very symmetrical too.
My Left, Center, Right are each flat to 4hz. So it is technically impossible for me to disable stereo bass (actually I could disable those cones or frequencies, but I'm trying to prove a point here.
Boys will be Boys and Bassheads will be Bassheads.
All you need is 2 or 3 subs if you have small mains; you don't need to go full-mental like I have here
with a zillion cones, wires, amps and external processors, and with a 4hz capable center channel too.
Now keep in mind my system is still a work-in-progress. I'm adding more channels of amplification and wattage.
Trying to go from the 9 amps and 19 channels and 43kW that I have now, to 8 amps and 24 channels and 80kW. The overall layout will remain the same. (But that's only a slightly-related bass-system topic.)
It has been 4 years since I have forced my system to output just mono-bass but I might be able to make a video demonstrating the audible differences.
Unfortunately my camera only has 1 mic so you still won't hear it the way I hear it with my 2 ears, but it might give you an slight idea of what stereophonic bass your AVR is discarding.