3-way electronic crossover network from Blitz includes subwoofer level control Car audio accessory features a chrome plated chassis Accessory also features a clear acrylic protective cover Green light illumination LED power on indicator Front and rear inputs In (subwoofer)/ out (crossover/amp) selector and ports Subwoofer/mid-range/high pass outputs with gain controls Subwoofer selectable phase shifter Adjustable bass boost/bass frequency (25 -250hz) controls Slope rate: 12db/octave Bass boost: 0db-12db Band pass/ high pass selector on mid-range Sub level and q. selector (2-20 variable) Subwoofer stereo/mono selector Adjustable frequency selector, low: 40-400hz/mid: 40-7khz/high: 40-8khz Frequency multiplier (x1, x10) on high pass output Dimensions: 1.8 inches high x 9.3 inches wide x 6.4 inches deep