Alpine KTP-445U

compact 4-channel car amplifier 45 watts RMS x 4 at 4 or 2 ohms 90 watts RMS x 2 bridged at 4 ohms CEA-2006 compliant Class D amp technology selectable high-pass filters (60, 80, or 120 Hz at 12 dB/octave) switchable 2- or 4-channel input switchable RCA or speaker-level inputs fuse: 15A dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D