The Pyle PLMRA420 4 Channel 1000 Watt Waterproof Marine Bridgeable Mosfet Amplifier will power your speakers on the dock, in your boat, or by the pool - it's completely waterproof. This 4-channel, 1000-watt bridgeable marine amp takes both high and low level inputs, so it's compatible with a variety of head units and sources.
Use in stereo, or double the power by bridging inputs. It comes with variable electronic crossover network, variable bass boost and variable gain control for total control over your sound. Blue LED level display lets you keep an eye on your signal. For protection, count on the thermal, overload and short circuit protection.