Description:       Monoblock Subwoofer Amplifier
      Inputs:       One Stereo Pair (RCA-Type Jacks), Differential-Balanced Inputs, sum to mono internally.
      On-board Crossover:       State-variable, 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley with continuously variable cutoff frequency selection from 50 - 500 Hz (defeatable).
      Preamp Output:       Buffered pass-through type
      Infrasonic Filter:       24 dB/octave Butterworth @ 30 Hz, defeatable
      Dual mono speaker output connections:       Accept up to 12 AWG wire
      +12V and Ground connections:       Accept up to 4 AWG wire
      Notes: NexD™ High Speed Class D, Remote Level Control via Optional HD-RLC (Sold Separately).