I've currently got a 10" SVS-PB1000 and an 8" Dayton SUB-800 behind the couch in my 2150 ft^3 theater. I don't know if the 8" is doing much at all, but I just threw it in there since I already had it and figured it'd help with any dead zones from the primary sub. There's no real MLP since the couch has 4 seats and people tend to sit wherever they want. Listening preference is 95% theater, 5% music, and typically at low-to-moderate volumes.
To my ears, my current setup sounds pretty good. Bass is satisfying, and I've got some cheap transducers installed in my couch to provide some rumble. But hanging around these forums, I know I'm leaving a lot on the table. According to this calculator, I'm getting pretty much nothing in the low-bass range: https://www.avsforum.com/forum/113-s...ulf-score.html
And so, even though I'm not entirely unhappy with my current setup, I'm getting the itch to experiment and upgrade. Buying commercial subs is an expensive way to experiment, of course, so I've come around to the idea of DIY. Generally, I'm lousy with DIY projects (impatient, sloppy and have a lousy sense of aesthetics!) and have no access to power tools. On the plus side, I'm not in a rush with this project, the subs will be tucked behind a couch, and I'm OK with the idea of burning a little bit of cash in order to learn and iterate.
I'm thinking a flat pack from PE is the way to go... I'd start with a single 15" Ultimax kit and see how it goes.
First question is... would I be better off with a UM-18 instead? That seems like overkill to me -- the pack costs more and I'd need a bigger amp as well (inuke 6000 vs 3000?). Remember, listening levels are pretty moderate, and I'm guessing that even the 15" would be a huge improvement over what I have now.
Next question is... does my SVS PB-1000 have any place in my new setup? Would it make sense to keep it alongside my new DIY sub to provide some nice clean mid-bass? Or should I just sell it and build a second sub?
And finally.... am I crazy? I'm starting this project mostly to satisfy my curiosity. Maybe I won't even see such a great upgrade from my current setup at moderate volume?
Thanks in advance for any answers/help/insights!