Heres what "loud" looks like the Kicker Impulse IX404! This 4-channel amp will fill your vehicle with loud, well-defined music while keeping distortion at bay. Youll appreciate the clean, precision-crafted look of the IX404 almost as much as the incredible system design opportunities it presents. It offers two circuits each for bass and treble adjustments to get your front and rear speakers rockin the way you want. Two active crossovers let you direct frequencies for maximum effect. Select from 2-, 3-, 4-channel, or Tri-Way output, depending on your wiring needs. Buffered RCA outputs let you link multiple amps without using splitters.