Rockford Fosgate R125-2 Prime 125-Watt 2-Channel Amplifier (Discontinued by Manufacturer) Crossover controls: High-Pass (HP): 80Hz Fixed at 12dB/octave Butterworth Low-Pass (LP): 50Hz-250Hz at 12dB/octave Butterworth. 1 Year Standard Warranty. 4 Gauge power/ground connections with built-in ATC fusing. RCA pass-thru outputs, MOSFET power supply