Hi-pass crossover: 32hz to 320 KHz (front / rear) x20 freq. multiplier (front) Lo-pass crossover: from 50 hz to 160 Hz (subwoofer) Variable bass frequency: 40 to 120 Hz boost level from 0–12 dB 18dB per octave crossover slopes Parallel input/mixed in/out switch A 20% restocking fee will be charged on returns or exchanges of any opened audio, telephone systems, home theater systems, dvd players, cameras, camcorders, digital cameras, radar detectors, electronic accessories or etc. unless defective. . **Customer responsible for return postage.