Boss BX15 Electronic Subwoofer Crossover, High & Low Inputs SUBWOOFER LOWPASS FREQUENCIES 50HZ/90HZ/180HZ; CROSSOVER SLOPE: 12 DB/OCTAVE; SUBWOOFER BASS BOOST +/- 12DB AT: 45HZ/80HZ/120HZ SIGNAL-TO-NOISE RATIO: &gt;100DB; CHANNEL SEPARATION: 70DB; THD: 0.01%; OUTPUT GAIN: +5DB INPUT LEVEL ADJUSTMENTS; GOLD PLATED CONNECTORS LED POWER INDICATOR; DIMENSIONS (W X L X H) 3 5/8-Inch X 4 7/8-Inch X 7/8-Inch