Like their 2-channel brothers, these 4-channel Kenwoods are built with MOSFET-switching power supplies for fast response, maximum output, and cooler operating temperatures. Larger-than-usual noise-suppression filters make sure all you hear is music. Speaker-level inputs allow easy connection to any head unit. Crutchfield also recommends the easily packaged KAC-748 amp with 35 watts of four-channel or 100 watts of two-channel capability. Dimensions of 11-5/8W x 2-1/4H x 12-5/8D inches make this a perfect muscle car amp.