Those are some sweet speakers. Things you can do to improve your system include adding two more subs (three gives you much improved coverage and smoothed response), and getting an RTA/measurement mic to measure your in-room decay might be an idea worth considering. LSRs have nice polar response but i suspect they might still benefit a decent bit from some work on the room - IE some diffusion panels and bass traps. The only way to really know what yoir room is contributing is to measure it! Once you've measured it, you can start seeing where the bass and treble settings on the active monitors should be and what they do. Placement makes a :big: difference for bass as near wall means you should lower the bass setting and vice versa perhaps, and for treble, harman studies have shown a preference for a falling power response as frequency rises as being perceived as more natural - but this depends on your room acoustics more than placement.
Back to placement, nearby objects and walls definitely impsct stereo image and clarity. So it doesn't ONLY affect bass.
Partsexpress sells a calibrated dayton microphone, and you can try tracking down a USB mic preamp like the m-audio. Home theater shack can really help you out on the software end with room equalization wizard. GIK acoustics sells some attractive panels.
Id avoid broadband absorption as I don't think you need it with those speakers. If absorption, it should be something which reflects above 400hz or so. placement of these panels in the room can change the sound as well. You may even find that removing carpet and replacing it with hardwood improves your SQ! Who knows! Measure, analyze, and discuss the room! See what ultimately sounds most natural to your ears.
Below the shroeder frequency where the room dominates the sound (normally around 350-500 hz) some people like to add some equalization. I'd probably leave it as is because equalization never deals with more than one seat, but if you prefer your own seat to others you might consider it (after bass traps) as it will tighten up the sound. Measurements will tell you where to add cuts, and i wouldn't add many boosts.
One final thing is that you should try stuffing the ports on the LSRs and adjusting the crossover accordingly. Sealed mains tend to blend better to subwoofers, and the electronic crossover should protect the driver in the sealed box. This might raise your crossover point -above- 80hz in which case I would only do it with a minimum of two subs because it starts getting localizable. Just listen and experiment and see what sounds tighter, smoother, louder, etc. Make sure to recalibrate the system after every change though.
Experiment with things that you --know-- are making a difference. It is rare that preamps and amps make one, and when they do, it means something is wrong! In your scenario nothing is wrong!
