Pyle PLMRA400 - Elite Series Waterproof Amplifier, 400 Watt 4-Channel AmpCategory: Ca Series AmplifierThis Pyle Hydra amp will power your speakers on the dock, in your boat, or by the pool, it's completely waterproof. This four-channel, 400-watt marine amp takes both high and low level inputs, so it's compatible with a variety of head units and sources. Remote turn/on off makes controlling this amp a breeze. Gold-plated RCA inputs means this amp won't be a weak link in your setup. For protection, count on the heavy-duty aluminum alloy heatsink to prevent overheating, as well as thermal, overload and short circuit protection.