Great feedback everybody. I agree about the corner placement being "overpowering". I have done that already and found that room boundries do boost the bass, but not in the best way, and the left side of my listening room where the sub was situated, was bass "heavy" despite the fact that bass below 100hz is supposed to be non-directional. I never set the crossover above 60hz and still it dominated the left side of the room. So I moved it inbetween my speakers. I have spent months pulling away from, and pushing it back toward the wall. Not sure if closer, or further away from wall matters. Doesn't seem to make too much difference. Currently x'd-over at 65hz. Spiked as well using 2 inch spikes.
Meiwan suggested 6 inches or so slightly BACK from the face of the main speakers. I have done that and can't be sure it made any difference.
A few more specifics: Sub is a JM LAB/Focal (Berrillium series) "UTOPIA". It has a 1000w. "bash" amp built in, a single, forward firing 16 inch driver, and is ported at the rear of the cabinet (transmission line I believe it's called). I am running it in balanced xlr mode. Not using the LFE input, but the L/R stereo inputs (summed bass??). My wall behind the speakers & S.W. are acoustically treated. 5 floor to ceiling absorption panels populate the ENTIRE wall. MBL radialstrahlers as you all know, have HUGE amounts of output in all directions, which made my wall VERY "live" and reflective. The sound was BRIGHT as hell. So I had panels built to "tame" it. Things are wonderful now. BUT. And that's a big BUT, it appears that my bass impact is suffering. Or does what I did to the wall not have as big a bearing than placement? This is why I struggle, and why I have turned to fellow Audiogoners for input and advice. So far alot of good advice given. Most of it I have already done before. So what do you folks think is REALLY going on? Is my JM LAB sub a piece of shit? Might I be better suited with 2 subs, instead of just 1? Run in stereo? Or do you think that my MBL's might just be overshadowing/outperforming my current sub?
I know I have posed a number of questions for your kind consideration, advice. But I am in sort of a quandry about this, and have (obviously) spent a fair amount of money on my system, and still I can't achieve the leval of "punch" and "slam" that I experience at C.E.S. in the MBL room. And they aren't even using a subwoofer. Ok, so that's what the meat of the matter is. More input please!
