Originally Posted by Alan P
Placing dual subs...especially ported subs that produce gobs of PR
(particle velocity) in that cabinet behind your TV would literally shake your TV to death
! Not to mention the heat build up that would also probably reduce the life of both the TV and the subs.....
Having a predetermined location for your sub(s) is a bad idea because subwoofer frequencies interact very differently with the room when compared to frequencies above the modal region (above 200hz or so). You may have a large null (no bass) or peak (too much bass) at your MLP (main listening position). The only way to shift those nulls/peaks is by moving either the sub or the MLP. Since it is much easier to move a sub, that is the preferred option.
If you predetermine the sub location, and that location provides you with a (let's say) -15dB null at 30hz at the MLP...then what?? I'll tell you what, you will come back here saying you are disappointed in your sub and want more recommendations. We will recommend you do a sub crawl and move the sub to the spot in the room that it works
best, not looks
All of that being said, I fully understand the WAF some guys must deal with...but in my system there is no compromise and it sounds incredible! Don't get me wrong, my system is in my living room as well and there are limits to what even I will accept as far as aesthetics goes...but where there's a will, there's a way.
That's a good post, Alan, and you know that I agree with you 100%. But, I sort of like to take this sort of thing in stages, so that people get there in their own time. The first priority, in my opinion, was to forget about putting subs inside a cabinet, and that's done now. Then, the second priority is to select a sub that will be capable in that volume of space, and I would lean toward a single ported Ultra for that. Over time, the OP may very well decide that he wants to experiment with other potential subwoofer locations in his room. And, somewhere along the way, he may also decide to go with dual subs.
But, I took a while to get there in my mixed-use room, and you probably did too. I remember starting with a pretty good predetermined location in my room, and then gradually seeing other options and opportunities, as my bass interests continued to evolve. And, I ended up seeing additional locations for subs, which have worked out well both functionally and aesthetically. So, for most of us, this may be a process, and he is starting on a pretty good path compared to where he has been. Coincidentally, I had a SuperCube, too, as my first sub. And, my problems with it were the same ones he mentioned.