i hope you havent ordered that crap yet, cause you can get better sounding subwoofers for cheaper at reaudio.com no its not a mainstream brand mainly b/c they focus more on their product than commercialism. if you talk to anyone that actually knows have a squat about caraudio then they will tell you this is a good brand, i recommend the SE's, they get loud and trust me, they sound good doing it. then for amps/midrange speakers, check out thezeb.com or ikesound.com ive ordered from both of these places and i can garauntee you wont find a better deal anywhere else. they have the kappas for hella cheap.