Independent Front, Rear and Subwoofer Output Level Controls; Front High Pass Crossover Variable From 32Hz to 250kHz; Rear High Pass Crossover Variable From 40Hz to 400kHz; Subwoofer Crossover Variable From 40Hz to 400Hz; Remote subwoofer level control; (sub out) Stereo/mono switch (subwoofer); Bass boost: Variable dB/octave or 12 dB/octave. ; Remote subwoofer level Parallecontroll input switch (permits feeding multiple channels from one input);High pass and sub outputs Variable over frequently; Signal-to-noise ratio: 110 dB. Dimensions: 8-1/2 (W) x 7-3/8 (L) x 1-5/8 (H);Signal-to-noise ratio: >100 dB Dimensions: 7-1/4 (W) x 7-3/8 (L) x 1 5/8 (H);Slope: 12 dB/octave Remote subwoofer level control Bass boost: variable 0 - +12DB @ 45HzPhase inversion shift switch; Stereo/mono switch (subwoofer).