BOSS Audio Systems R1100M-S Riot Series Car Audio Subwoofer Amplifier - 1100 High Output, Monoblock, Class A/B, 2/4 Ohm Stable, Low/High Level Inputs, Low Pass Crossover, Mosfet, Hook Up To Stereo -
Sound Storm Laboratories EV400.4 400W 4 Channel Car Power Amplifier Amp Mosfet SSL with RCA, Black - Walmart.com