My marrithin Amp works great i have know problems with it I recomend getting one that is well above your speakers in amps i mached the amps rms and it sounded muffled tryed hooking them up parralell didnt help then i took half of them away and it sounded grate. so they dont puch as many amp as they say its a good deal. Marrithon has no customer sevice but Sonic did and they helped me with a small tec problem.