JL AUDIO MHD900/5JL AUDIO 5 Channel Class D Marine System Amplifier, 100 W x 4 + 500 W x 1 Thanks to its ability to act as a "one box solution", the MHD900 5 is ideal for installations where space is at a premium and sound quality is the paramount goal. While extremely compact, this amazing amplifier will comfortably drive a complete high performance marine audio system: that is, four satellite speaker systems and a subwoofer system with a very serious 900 watts of