It has been over a month since the install. They are just now breaking. I use 2 of them in a sealed (1.5 cubic ft per chamber) box. Matched the subs with JBL GTO 700.1 @ 2ohm. Gain is about 3/4 and bass boost less than half way. My ears hurt. They hit so hard the whole car(02 Accord 4dr) shakes so much. I get the great lows which i really wanted. I would recommend this subs to anyone. I do not have any cons so far. I will update my review in 6 months or so.

I have had mine for about 2 months now. At first i received the singe voice coil version by mistake but i was able to ship it back fast and no cost to me (thanks sonic!)

But anyway, i running 450 rms to it and i think it could handle at least 500. But even though i have it wired to 2 ohms i measured it with my multi-meter and its reading about 2.8. I know its not going to be exactly 2 ohms but 2.8 seems a bit high to me so im not possitive its getting a full 450 watts rms. But for what it is getting it sounds pretty darn good. My amp is what is limiting it because it clips but im getting a new amp soon so it should be alot louder! I got this on sale but i think it is worth the regular price.
I also have it in the ported Sonic box and although i think it needs to be bigger for better lows, it sounds pretty good.

I had two of these subwoofers and they really pound. I had them in a sealed enclosures and it was still shaking everything. This is a nice entry level subwoofer. Would reccomend this to anyone that us just getting into car audio.

I just bought this sub and gotta say it is CRUSHINN! Had some JBL's about 6yrs ago and they were good then and they HIT still. For the price this is a hella deal. I've got in a ported custom box built to make my trunk area flush and its awesome. will definitely buy more of these. awesome product!! A++++

and this company will answer all ur questions about the sub and wiring suggestions. very helpful.

Bought theses a while ago and still hitting hard as b4, nice product, neighbors hear me coming and i only have a 1800watt amp and a 2farad cap...