Class D, 70W x 2 Zone AmplifierFUSION's Marine Zone Amplifier is designed to support the multi-zone technology. The Zone Amplifier is small, enabling discrete installation and when combined with the Marine Stereo Unit provides the platform for a True multi-zone audio system.Why Do I Need A Zone Amplifier?A Marine Zone Amplifier is needed if you are planning a multi-zoned system, comprising of three or four zones. FUSION's Marine Stereo Units have the capability to run up to four pairs of speakers. You will also need to install a Marine Zone Amplifier if your sound system has more than four pairs of speakers.Features: 2 Channel Class D 70W x 2 2 Ohm Stable Water resistant design Conformal coated PCB Audio detect selectable function the amplifier turns on when audio is detected and goes to sleep / low power mode when audio is not present Selectable high pass/ full range setting Variable high pass filter Small and discrete size: 128 x 78 x 51mm High Pass Crossover: 60Hz-600Hz Operating Range: 10-16V DC Max Power Rating (Watts): D-Class 70W Ratings per channel: 20W RMS @ 4 ohms per channel: 33WRMS @ 2 ohms per channel Product : FUSION ZONE AMPLIFIER 70W CLASS D, 2 CHANNEL Manufacturer : FUSION Manufacturer Part No : MS-AM702 UPC : 878816004082