The dbx 120A Subharmonic Synth delivers the throbbing low-end bass you want. It produces new, Waveform Modeled bass notes an octave below the bass in the original audio-smooth, musical, and floor-shaking even when output at system levels well below system and hearing damage thresholds. Provides 1/4" and RCA input connectors along with balanced 1/4" main outputs which can be full range (including synthesis) or HF only, plus a separate subwoofer output with level control.