Two Subs?

I don't think you need 2 subs unless your mains are extremely challenged...summing the left and right signals in the "high level" input of a REL and setting it at around 55 hz or so (or wherever your mains start to drop off) is all the bass you might need, but, of course, this is entirely room dependent. Multiple subs can get more standing waves and/or phase issues ramped up, and I prefer keeping my sub away from the gear. I am anti room correction device due to my inflated Professional Sound Mixer ego, and can (and do) adjust my REL level if it's out of balance. I think room correction gizmos are there for those who don't seem to be able to turn a sub up or down, insist on listening at extreme levels, the listening room is in an underground cavern full of medieval torture devices, bats, and dripping with moss, or simply feel so insecure about system set-up they require an electronic helping hand.

Sub measurements schmeasurements! I get lots of clean bass, because if I didn't I would be unhappy. Unclean bass indeed! Not sure what "smoother" sound means, but whatever I'm getting from my little REL seems smooth...I think it's dialed into maybe 58hz or something so it's actual low end only to maybe 25 hz (I measured it...so sue me!) before it gives up the ghost. I've measured my listening room using digital real time analyzers with various serious stupidly expensive pro cardioid mics, active and passive pro EQs both graphic and parametric notching types, and other stuff to play with my room system, and I prefer none of the above in the system as it seems cleaner without it. I simply turn the REL up or down...a teeny bit...ahhhhh...perfect!

Martykl...I understand. And I also understand that room correction "flattens" bass, resulting in flattened bass even if the music has large bass as in a giant bass drum (for example, one of those pops up here and there in a fave Scofield/Frissell album). There's the rub. I'm happy you're comfortable with your flattened bass, as I'm comfortable with my sometimes bumpy, and to me anyway, more realistic room sound. Bass level issues are a matter of degreee of course and I can't live with what I consider to be unnatural lumpiness in anything, including people (Hollywood plastic surgeons get no "support" from me). I insist my preference be universally shared by everyone at all times forever, and invite everyone to join in my Campaign Against Unnatural Lumpiness.

As an audio engineer, I can safely say that room correction absolutely "flattens" bass, because that's what it's designed to do. And Bo, you have no idea what my system sounds like, as I have no idea how you "played" Kodo drums with room correction at a show. Isolation booth? Did the "room correction" somehow stop the acoustic bleed through? I grew up with Japanese drumming here and there in Hawaii, and if you could really play those things there's no "room correction" that could stop 'em in a live setting. But then I suppose in the alternative universe you occupy there is room correction blanketing any aural phenomena, REL woofers are slow, and your posts make sense.

Bo...you should perhaps familiarize yourself with audio terms..."flatten" in this case simply means to straighten a frequency curve using EQ and volume parameters designed into room correction devices. This is based on device measurements that "see" low frequency peaks interpreted by the device as undesireable room reflection generated standing waves, or what the designers of the gadget have deemed to be unnatural bass frequency modes. I assume you used a recording of a Kodo...so disregard the last part of my previous post, unless you really did play the things. Also, I use a sealed REL Q150e front firing woofer, although downfiring woofers can and do integrate fine with mains for many listeners who's ears might differ from yours...140hz is a ridiculously high frequency point for subs, and it's weird you think that should work well...hmm...sort of goes to credibility there.

Bo...I can only assume things about your taste in sound quality based on your posts. When you claim to use subs crossed over at 140hz and then you filter the hell out of them with room correction, I can get a good idea of what you're looking for. Likely a sound similar to a Joe Bonamasa concert. When you make ridiculous and condescending statements about "coloration" you also strain credibility...I use a REL high level input which replicates the power amp tone, and any musical tone cues that would reveal innacurate coloration are absent at the low frequency points the REL produces with distortion inaudible when driven at reasonable levels. If you had listened to the things you supposedly sold, even with the unsophisticated and clearly untrained ears attached to your thick head, you might understand something about basic acoustics, musical accuracy, and what professional musicians and sound engineers often hear.