JBL BASSPROSL Powered 8" Underseat Subwoofer System General Specifications Amplifier Power125W RMS Fuse20A Maximum Current Draw12A Quiescent Current Drawless than 800mA Input Sensitivity0.2V  2V Line-Level Input; 2V  20V High-Level Input Audio Specifications Frequency Response35Hz  120Hz Crossover Frequency50Hz  120Hz Crossover Slope12dB/octave Bass Boost0dB to +9dB @ 70Hz Dimensions Width9-7/8"; (250mm) Length13-9/16"; (344mm) Woofer Specifications Woofer8"; (200mm)