as the title says, i just got my dual subs in today. i have been waiting a couple weeks, but they finally showed up. one was slightly damamged from shipping, i have to talk to velodyne about replacing it tomorrow. it took me several hours to set them up. they work well behind each main speaker, about 1" or so from the back wall, facing outwards towards the side walls. this is where i have the most bass. i didnt do any crazy spl tests because i have it calibrated nicely, and dont want to go messing with the levels. and, subs loosen quite a bit after a few weeks, i can do the tests then. but, for now, im getting an easy 110dB where i sit, at comfortable listening levels. the room is about 20' x 15' with 15' or so high ceilings. the back is completely open too. so, with openings, the room is around 35' x 20'. its pretty good sized. i had a supercube reference before, and after getting these, i must admit, that deftech was a decent little sub for the cash. these are more than 3x the price. i do notice the extra headroom quite a bit. everything seems more effortless. plus, i dont have to go adjusting the levels all the time. rap has all the bass it needs, and then classical and jazz doesnt have excess bass, all on the same settings. but, just in case, i got the remote control option so i can dial it in where i sit. plus, since im doing dual subs, i want to control them both at the same time. i originally had them hooked up as main preouts, running my fronts full range. but, it sounds best with them hooked up just as LFE. the cool thing is i am getting a great linear response out of them. i used an spl meter and a frequency sweep, and im getting (from around 25hz - 20khz) about a +-1dB response! the meter was all but fixed during the whole sweep. since the subs are new, and not broken in, it dropped a bit at lower frequencies. all in all, its good! it can only get better with more break-in!