That guy above with the experience with the 3510 has a perfect suggestion if you were looking into the 9510e for an SQL system. The new 3510d in bigger and badder than the 3510c was and was pitted against the 10W6v2, IDMax10 and some T310 RF sub in a shootout comparison for nice subs under $400. The 3510d came out on top in the initial review. If you read the write-up in the Car Audio & Electronics magazine, you'll see that it was more impressive than the rest, when you look at the score card at the end, you'll see it had been revised and severely shortened. It was sent in and they played it in a 1.5 cubic foot vented enclosure against the IDMax and 10w6v2 in their recommended sealed enclosures. It's a sick sub dude. But despite popular or even unpopular belief, (depends on which forum you peruse) you will have to break or beat them in for quite a while to get the Fs down and just break in the suspension for optimum performance and extension. The 9500's have 8 spiders on them, they are designed to give the subs the best chance of survival in todays eccentric market of 3kw daily driving amps. It's not the sub if you want it to jump out of the frame at 30Hz on 1000w.