Timpano Audio's ultra-compact TPT-500.4 4-channel car audio amplifier is ideal for installations where space is at a minimum. With built in crossovers, 50 watts per channel (4 ohms), 2 ohm stability, and extensive protection circuitry, this amplifier packs everything you expect from larger amps into a 4" x 5" x 2" package. The small size and high output capability makes the TPT-500.4 perfect for powering motorcycle and ATV sound systems.