Weatherproof Compact 4 Channel Marine Amplifier - 300WPioneer's GM-ME300X4C is a Class-D weatherproof 4-channel marine amplifier that is IP67 rated and SAE J1171 Certified. This amplifier features 21-step frequency selection and top adjustment access that benefits when installing into narrow compartments. The microcomputer Protection Control System (PCS), provides thermal protection, controlled current, and voltage protection to ensure stable output operation. Independent speaker output settings for each channel provide speaker matching flexibility.Features:IP67 ratedPCS (Protection Control System)21-step frequency selection (LPF/HPF)Selectable Power Mode (Mono/ 2CH)Switching power supply controlled by microcomputerTechnical Specifications:Number of Channels - 6Frequency Response - 20 - 240 Hz2 Ohm RMS Power Per Channel - 75W x 44 Ohm RMS Power Per Channel - 75W x 4Signal-to-Noise Ratio - 75dBDimensions (L x W x H) - 11-1/2 x 4-1/8 x 1-5/8*Sold as an Individual