4 Channel; 600 Watt Power; 12/24 Decibel Per Octave Crossover Filter Slope/ 50 Hz To 500 Hz Filter Crossover Frequency Range/ Low-Pass And High-Pass Crossover Filter Mode; Without Cooling Fan; 7.85 Inch Length x 10.74 Inch Width x 1.93 Inch Height; Powder Coated; White/ Gray; With Lateral Mounting Feet And Hex Wrench; Full Range Class D; 6 Hz To 30 kHz Frequency Response; 50 Ampere Fuse Rating; Refer Installation Instruction For Rated Continuous (RMS) Power; For Marine Use