Pyle Hydra Marine Amplifier Upgraded Elite Series 400 Watt 2 Channel Bridgeable Audio Amplifier-Waterproof, Dual MOSFET Power Supply, GAIN Level Controls, RCA Stereo Input & LED Indicator (PLMRA200)This Pyle Hydra amp will power your speakers on the dock, in your boat, or by the pool – it’s completely waterproof. This marine amp is compatible with a variety of head units and sources. For protection, count on the heavy duty aluminum alloy heatsink to prevent overheating, as well as thermal, overload, and short circuit protection. Comes complete with mounting screws and hardware. Features: Bridgeable Audio Amplifier 2-Channel System Dual MOSFET Power Supply Marine Grade Construction Waterproof Marine Rating IP-01 Stereo / Bridge Mode Selection Switch Adjustable Input GAIN Level Control RCA (L/R) Input Connector Jacks High Level Speaker Input Connector Power & Protection LED Indicator Lights Gold-Plated Speaker Output Terminal Connectors Crossover Frequency Control Anti-Thump Delay Circuitry Built-in Thermal, Overload & Speaker Short Protection Heavy Duty Aluminum Alloy Heatsink Remote Turn ON/OFF Technical Specs: MAX Power: 400 Watt RMS Power: 200 Watt Amplifier Class: AB Fuse Type: 15A Crossover Frequency Adjustable: 40 - 450Hz Frequency Response: 10 - 30kHz +/-3dB Input Impedance: 10k Ohms Input Sensitivity: 250mV-1V Matching Speaker Impedance: 4-8 Ohms T.H.D.: <0.04% Power Supply: DC 12V Dimensions (L x W x H): 10.0'' x 7.9'' x 2.0'' Sold as: Unit Weight: 5.09 lbs.Pyle PLMRW8 8-Inch Outdoor Marine Audio Subwoofer - 400 Watt Single White Waterproof Bass Loud Speaker For Marine Stereo Sound System, Under Helm or Box Case Mount in Small Boat, Water VehiclePyle Model : PLMRW8 8'' Marine Subwoofer, 800 Watt Single 8" 400 Watt White 4 Ohm Marine Subwoofer 8'' High Quality Polypropylene Cone Water Resistant Construction Design 40 oz Magnet Structure 1.5'' High Temperature Voice Coil 400 Watts Peak Power Frequency Response: 35-3.5K Hz 4 Ohm Impedance Sensitivity: 91 dB Overall Diameter: 8.5'' Mounting Depth: 3.60'' This 400-watt Pyle Hydra subwoofer will blow you out of the water! It's constructed from water resistant plastic, supporting a 8' high quality polypropylene cone. The 40 oz. magnet structure and 1.5' high temperature voice coil boom with power and achieve a frequency response of 35 Hz to 3.5 kHz.