Legacy LA2001D 3000W CLASS D Mono Block MOSFET Digital Power Amplifier 3000W x 1 Output @ 2 Ohms - Variable Low-Pass : 40 Hz-250 Hz - Glass Epoxy PCB - Power & Protection LED Indicator - THD:0.1 % Mono Block Subwoofer Amplifier - Variable Input Level (Gain) Control : 6V-200mV - Thermal / Overload / Short Circuit Protection - Low Level RCA Input : 10K Ohms - 4x25 Amp ATO Type Fuse 1 Ohm Stable - Variable Bass Boost : 0~+18dB - Soft Turn On/Off - Line Level RCA Output - Slim Size Amplifier Design For Easy Installation MOSFET Power Supply - Variable Subsonic Filter : 10Hz~100Hz, 24dB/Octave - Phase Control 0-180 degree - Frequency Response : 20 Hz-250 Hz - Dimensions: 10.74"W x1.69"H x 13"L PWM (Pulse-Width-Modulation) System - Sub Sonic Switch - Custom Terminal Block for Speaker Connection - Signal to Noise Ratio: &gt;90dB