well.. not completely.. i heard them for the first time at the ford event, whoever did the custom install, really tuned it well, VERY nice bass, but is it worth a 60lbs "flame" series sub? no. i can get a deeper sound/better sound with a different sub.
Their amps are just crappy, imo. They run too hot, yes, the heat sink is doing the job, but the heat should leave the vents, not make the amp run hot.. hot amp = not effecient... Plus they like to distort when pushing them hard.
Kicker SoloX in a 8 cubic foot box owns j00, for SPL (110 lbs 18" solo baric sub, handles 5000 RMS and 10000 PEAK).. heard one in Tulsa... i am the person you see that stands next to the loudest of the loudest and not plug my ears.. and this shit, made my chest hurt and ears ring