Subwoofers?

Theo, rotating the sub can have a profound effect since the enclosure is around 22" long. In fact, in my system, I had the sub facing the wall (at mid-wall) and I had a standing wave that just wouldn't be tamed. But I rotated the sub so that the woofer faced out into the room, which effectively brought the driver another 22" away from the wall and now that big peak has been largely tamed. And facing it to the side instead of straight ahead has a large effect too, so you may have a couple of options left before you think about moving to a more expensive sub. I think it also helped mine when I put it up on 3 BDR cones, and by all means use that level control too.

The RELs have been getting great press, but even the RELs are subject to the same laws of physics that ultimately determine the performance of any and all subwoofers in a given room. So my advice stands.

That said, if you are very limited as to where the sub can be placed it may not be possible to achieve good results in your room with any subwoofer. Try the positioning and let me know if that works for you.

The room has a larger impact on bass transient response than the drivers.
If there's a large peak in the bass response of your room, the bass transient response is going to be slow and boomy, regardless of the quality of your subwoofer.

Bass traps are the only real solution to "slow bass" in most rooms; it is not possible to have too much bass trapping.
Parametric equalization can also be used, but this only compensates for amplitude, and does nothing to fix the room resonances that cause the amplitude problems in the first place, and attempting to equalize a large null can increase distortion and reduce amplifier headroom.

After fixing the room, distortion and doubling from the subwoofer itself become the next important issues to address, and on this point, high-end subs will begin to dramatically outperform low-end subs.

ie: the sonic differences between subwoofers are almost always swamped by the much larger effects of room acoustics and standing waves.
It's a small rainstorm within a hurricane.

Well said, Snickelfritz! That was almost poetic. :)

jdombrow, did you purchase a sub yet???????

I'd definitely experiment with different sub positions and angles, and the crossover/volume settings on the X30 before getting another sub.

I have an old NHT SW3P being powered by a Bryston 4b, controlled by a Paradigm X30 and have achieved satisfying bass for my small room. Opting for a lower crossover setting helped reduce boom and give the illusion of better speed and pitch. And, finding an unorthodox location mid way along the side wall facing in helped too. It can take a lot of work and listening, but the results may surprise you.

Two smaller, faster subs might be a better solution. That is if you can swing the extra cash and have the room for them.