The world's first 7 channel equalizer gives you total control of your home theater's acoustical environment with 11 equalizer controls for the front and center channels, 7 for the stereo subwoofer channels and 5 for the surround channels. A 24dB/octave Linkwitz-Riley alignment electronic crossover allows hook-up to a subwoofer even without separate subwoofer inputs. Module frequency programmability permits the crossover to be customized to any speaker combination imaginable. New 5.1 surround system ready.