DBX 120A Subharmonic Synthesizer

Priced: $199.95
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DBX 120A Subharmonic Synthesizer -

The dbx 120A Sub-harmonic Synthesizer with Modeled Waveform Synthesis has been specifically optimized to enhance bass audio material for use in a variety of professional applications, including nightclub and dance DJ mixing, theatre and film sound, music recording, live music performance and broadcasting. The unit's patented modeled Waveform Synthesis process builds a synthesized waveform, using the wave shapes of the original bass material, to produce a new modeled bass note exactly one octave below the original. The dbx process produces smooth, musical low frequencies that do not interfere with mid and high-band information even when maximum synthesis and boost are applied.
The 120A's two separate bands of sub-harmonic synthesis provide the best combination of smoothness and control, while the independent low frequency boost circuit is designed to get the most out of high-performance, low frequency speaker systems. Flexible system interfacing is achieved by providing main outputs which can be full range (including synthesis) or high-frequency only, along with a separate subwoofer output with its own level control. The result is a low-end punch that is really felt, even at system levels that won't destroy sound equipment or damage hearing.


  • Built-in crossover with choice of 80Hz or 120Hz crossover point
  • Live Music Performance
  • DJ Mixing
  • Separate Subwoofer Output
  • Theater and Film Sound
  • Separate Low Frequency Boost Circuit
  • Nightclub and dance mixing
  • 1/4" Balanced inputs and outputs
  • Music Recording
  • Broadcasting
  • Front panel LEDs that show crossover status and synthesis activity
  • RCA Input Connectors
  • Patented circuitry ensures that mid and high frequencies are not affected
  • Individual control for two ranges of subharmonic frequencies
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Connector Type:1/4" TRS jacks (inputs and outputs) RCA inputs
Crossover:12dB/octave high pass (-3dB @ 80 Hz or 120Hz); 6dB/octave derived low pass. Phase-coherent (unity-sum)
Dimensions:1.75"x19"x6.2" (4.5cm x 48.3cm x 15.75cm)
Dynamic Range:112dB
Frequency Response:20Hz-20kHz ±0.5dB, (no synthesis, full-range mode) 15Hz-90kHz +0, -3dB
Front Panel Controls:26-36Hz and 36-56Hz Band Synthesis Level, Subharmonics, Low Frequency Boost, Subwoofer Output Crossover Frequency, Select, Crossover in/out
Indicators:Power, Crossover, Bypass
Input Impedance:>= 40k ohm Bal or 20k ohm unbal. (1/4") 20k ohm (RCA)
Maximum Input Level:+22dBu (1/4") +8.5dBV (RCA)
Maximum Output Level:+22 dBu into 600 ohm
Metering:Synthesis activity (3 LEDs per band)
Output Impedance:100 ohm, Impedance balanced
Output Noise:-88dBu, controls@max., 22Hz > 22kHz unweighted (full range output)
Power Requirements:100-120VAC; 50/60Hz DO Version, 220-240VAC; 50/60Hz EU Version
Rack Space:1 Rack Unit
Synthesis Frequency Range:26-56Hz (from 54-110Hz input signal)
THD:0.05% (no synthesis, either output)
Weight:4.75 lbs/2.15 kg

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