I was wondering if anyone here uses a REL sub? After hearing a couple of their subs this past weekend at my dealer I ordered a Strata III and should get it sometime next week. I've never liked subs with music but this didn't sound boomy or muddy at all. It's lowest crossover point is 22Hz and allows it to get under the mains so you don't notice the sub at all. I heard the Strata III with a pair of Triangle Titus's and a Sim Audio integrated amp and CD player and the sound was huge with solid quick bass and a wide and deep stage but when the sub was taken out the stage collapsed and sounded kind of flat and nothing special.