Poly-Planar - 2-Channel Expansion Amplifier - 50W - ME-52. The ME-52 is a compact 2-channel 50-watt audio amplifier with separate volume control. This unit is designed for adding additional speakers to an existing system or as a separate zone amp. It has a compact, waterproof design that allows for flexible mounting possibilities, and makes it simple to expand the audio system capabilities for any installation.. Features:. Accepts line level or speaker level inputs. Powers up to 4, 4 Ohm speakers. Separate waterproof Volume control (10' lead). Use to add additional loudspeakers to a current audio system. Use to provide amplification for a separate audio zone. Use as a stand-alone system amplifier for any audio source. Specifications:. Speaker Impedance: 2-8 ohm. Output Power 2ohm load: 25W RMS/Channel. Output Power 4ohm load: 15W RMS/Channel. Frequency Response: 20Hz-20kHz. Operating Voltage: 13.8V DC (10V-16V. Idle Current (no signal): 10mA. Maximum Current Draw (full power): 7 amps.