I am thoroughly impressed with my xl spl10d2, pics do this sub no justice whatsoever. In about 1.25cuft, after displacement, tuned to 32hrtz, on an Incriminator Audio 3rd gen IA20.1 at 1ohm, and it thrives. It is just as musical as the pair of RE Audio sx10d4s that it replaced, yes, this one sub puts in the work of two. It may not get as loud, but its lows have more authority, it just drops down there and begs for more. And there are still so many that spit out that DC Audio's soft parts are not good for the low lows, I beg to differ. This is my second DC sub, my first was a lvl4 12 a few years ago, and it was a beast as well. Thank you DC Audio-Rusty, for this beautiful 56lb beast, that hits them lows with the a fore mentioned authority, I simply love mine. Let them go ahead and think that DC subs can't handle the lows, because we for sure, know the truth. My only regret is that I can't afford to run a pair of the bad boys.