Boss BX25 2-Way Electronic Crossover with Remote Subwoofer Level Control Speaker Input Gain Remote Subwoofer Level Control Crossover Slope Sub-Channel: 12 Octaves Number of Channels: 2 RCA Outputs: Subwoofer, Front Signal-to-Noise Ratio: 90 dB Total Harmonic Distortion @ RMS Output: 0.01% VARIABLE CROSSOVER FREQUENCIES: SUBWOOFER: 35HZ-400HZ; HIGH PASS : 50HZ-1.5KHZ VARIABLE BASS BOOST, 0 - +18DB @ 45HZ; SLOPE RATE: 12 DB/OCTAVE; SIGNAL-TO-NOISE RATIO: &gt;90DB REMOTE SUBWOOFER LEVEL CONTROL; PHASE INVERSION SWITCH FOR SUB OUTPUT GOLD PLATED CONNECTORS; LED POWER INDICATOR DIMENSIONS (W X L X H) : 5  X 6 5/8 X 1