Everything you need in one package, and then some! Award-winning Solo-Baric L7 Subwoofers in a tough but convenient, down-firing enclosure, and big power from an internal amplifier providing big bass to your vehicle. Outstanding! Powerful and Down-Firing - It Means Business! Compact, factory-tuned enclosure for tight locations to fit many trucks and SUVs Amp is built-in and power-matched for the hardest-hitting bass Easily integrates with factory system Down-firing for ultimate subwoofer protection Thick, tough internal bracing to resist stacking weight Solo-Baric L7 square technology for moving more air and creating more bass Start/Stop-System Compatible Remote bass control included If you have two mono amps or powered subwoofers, check out the DBRC Remote for controlling both from the same knob. Specifications TYPE: powered down-fire WOOFER SIZE (in, cm): 12, 30 RMS POWER (watts at 14.4v): 600 PHASE SWITCH: 0-180° FREQUENCY RESPONSE (Hz): 25-120 S-TO-N RATIO (A-weighted, re: rated power): >90dB INPUT SENSITIVITY: Low Level – 125mV-5V; High Level – 1V-40V CROSSOVER: active 24dB/octave, variable 50-120Hz low pass; 24dB/octave, high pass at 25Hz BOX HEIGHT (in, cm): 7-7/8, 20.2 BOX DEPTH (in, cm): 15, 38 BOX WIDTH (in, cm): 23-7/8, 60.5