I have an audiobahn 1200 DUB 12" sub that's pretty stout. (Currently for sale
) I wouldn't call it a SQ sub, but it was definitely loud enough to be obnoxious. I was feeding it just under 1000 watts in a sealed enclosure, and it'll rattle change in your cupholders, and make you hate your sliding back rear window with a passion. Overall an excellent value for the 70 bucks I paid for it. I will admit some of their product line I have doubts on (for example all of their midrange speakers), but they do have some good items as well.
Any nobody should buy a speaker for looks, that's just dumb.
As a whole, the company has a bad rap, but you'll find most don't speak from first hand knowledge, just hearsay. (same for sony) I wouldn't put them in the same category as MTX or Alpine, but I wouldn't put them with lightning audio either...