Shark Shkamp3500d 3500w Slim Design Mono Mosfet Car Audio Professional Super Thin Car Truck Van Amplifier RMS@4 Ohm(&lt;1%DISTORION)-1450W, RMS@2 Ohm(&lt;1%DISTORION)-2500W, RMS@1 Ohm(&lt;1%DISTORION)-3000W Input Level-0.2~5V, Frequency Response- 8~180Hz, LPF-40~180Hz SUBSONIC FILTER-5~50Hz, Bass Boost Frequency-0~80Hz, Bass Boost Level-0~12dB Signal Noise Ratio-70dB, Best Efficiency-85%, Bridgeable with Same Amplifier-NO Overload Protect System-YES, Short Circuit Test(max power)-PASS, Overheat Protect Temperature-80/176F Components &PCB-SMT&Double side