You get what you pay for, that's why I almost always run JL. All these discount dealers just use mostly the same parts for 90% of this stuff. Like the amps, they are the same amp with a different name etched on them. I was looking at 3 amps the other day, and they where identical, it was the audio legion 3500, and I can't remember what the other two where but they are here on ssa to. When your sub was ordered they probably just grabbed some parts out of a giant bin. and slapped it together half ass. I myself made the mistake of buying a crescendo BC3500, now it's been months and I can't find or buy another to match it, so I will either have to eat a big loss, or run different amps. I will say one thing for my W7's, there all designed and built different for there size, and not just a frankenwoofer built out of cheap spare parts for 3-4 sizes. Did you not notice most of these subs have the same motors from the 10 to the 15 inch? But even still some of them can do big numbers, but usually don't last, or sound like shit doing it. My last set of spl type subs lasted 6 months, and I have had my JL's for a few years now. They have already destroyed one car, and now working on the second. Yea I need dynomat I know, I'm working on it. But atleast these subs have reconesvso they can just super glue you another One together. Then six months or so down the road it will probably need another. Good thing there cheap it cost like $350 to have my dub 7 rebuilt.