Hifonics BRX1000.1D Brutus Vehicle Mono Subwoofer Amplifier (Discontinued by Manufacturer) Molded and angled ILLUMINATED Terminals for stress free installation access Accu-Cross crossovers and adjustments for sound shaping Ultra-Fi MOSFETS NGSD Next Generation Super D-Class for extremely efficient system 1 x 400 @ 4 Ohms, 1 x 700 @ 2 Ohms, 1 x 1000 @ 1 Ohm