The New In Phase IPX1404 range of amplifiers from In Phase, are possibly one of the best car amplifiers available today. Car amplifiers are the heart of a system & need be of the best quality available for your budget. Inphase IPX1404 car amplifiers have been renowned throughout the world & are rated vey high by some of the most famous musicians like Akon. All the Inphase IPX1404 car amplifiers are hands assemble & go through 35 different check to make sure you get the best possible car amplifier today. The IPX1404 car amplifiers give you the true RMS power to power your system. Some of the amazing features of the new Inphase IPX1404 amplifiers are, Subsonic filter so you can adjust your amplifier to deliver more power to the desire frequency range, which mean more power to your speaker. Line in & line out so you can run as many In Phase amplifiers as you want one a single RCA cable. Dual layer circuit boards for enhanced sound quality & low resistance from internal