DBX 120A


The 120A's patented subharmonic synthesis process actually builds the synthesized waveform using the waveshape of the original bass material. Unlike other attempts at bass synthesis, the dbx process produces smooth, musical low frequencies that don't interfere with mid and high-band information, even when maximum synthesis and boost are applied. The result is a low-end punch that people really feel, even at system levels that won't destroy sound equipment or damage hearing.


  • Connector :- 1/4" TRS jacks (inputs and outputs) RCA inputs
  • Input Impedance :- >= 40k ohm Bal or 20k ohm unbal. (1/4") 20k ohm (RCA)
  • Max Input :- +22dBu (1/4") +8.5dBV (RCA)
  • Output Impedance :- 100 ohm, Impedance balanced
  • Max Output :-+22 dBu into 600 ohm
  • Frequency Response :- 20Hz-20kHz ±0.5dB, (no synthesis, full-range mode) 15Hz-90kHz +0, -3dB
  • THD :- 0.05% (no synthesis, either output)
  • Noise :- -88dBu, controls@max., 22Hz > 22kHz unweighted (full range output)
  • Dynamic Range :- 112dB
  • Synthesis Frequency Range :- 26-56Hz (from 54-110Hz input signal)
  • Crossover :- 12dB/octave high pass (-3dB @ 80 Hz or 120Hz); 6dB/octave derived low pass. Phase-coherent (unity-sum)
  • Indicators :- Power, Crossover, Bypass
  • Metering :- Synthesis activity (3 LEDs per band)
  • Controls :- 26-36Hz and 36-56Hz Band Synthesis Level, Subharmonics, Low Frequency Boost, Subwoofer Output Crossover Frequency, Select, Crossover in/out