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Behringer TD-3-MO-SR Modded Out Analog Bass Synth

Manufacturer: Behringer
SKU: 450700
“Modded Out” Analog Bass Line Synthesizer with VCO, MIDI-Controllable VCF and Sub-Harmonics Oscillator
Availability: Backorder - Contact for ETA
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Sometime after the release of the original TB-303, creative users realized that there was more to squeeze out of an already amazing bass machine, to produce sounds that were unique to themselves.

As word started spreading about third-party mods adding more functions and many more ways to shape sounds, synth-heads around the world wanted to get their hands on a modded TB-303.

Now it’s a lot easier to get that awesome “modded-out” sound with the Behringer TD-3-MO-SR, an ultra-affordable and faithful homage to the iconic synthesizer that’s capable of creating some fiery basslines and much more.

With its pure analog signal path, 16-step sequencer and authentic VCO, VCF and VCA filters, the TD-3-MO-SR is sure to become one of your favorite synthesizers.


  • “Modded Out” Bass Line synthesizer featuring the most legendary modifications
  • Pure analog signal path based on legendary VCO, VCF and VCA designs
  • Sawtooth and square waveform VCO with transistor wave-shaping circuitry
  • Amazing 4-pole low-pass resonant filter with cut-off, resonance, envelope, decay and accent controls
  • Easy-to-use 16-step sequencer with 7 tracks, each with 250 user patterns
  • Filter frequency fully controllable via MIDI C/C
  • Earth-shattering sub-harmonics oscillator with switchable output level
  • Authentic analog slide circuitry with external slide control
  • Slide Time control allows for variable slide time (up to 6 times longer)
  • Sweep Speed switch features 3 accent speed modes (slow, norm, fast)
  • Accent Sweep switch features 3 sweep combinations with high resonance mode
  • Filter FM control modulates frequency of the filter from the audio output of the VCA
  • Muffler circuitry features post VCA distortion with full bass response
  • Dedicated Accent push button to manually activate the accent
  • Soft Attack control for wide range of attack times for non-accented notes
  • Normal control for wide range of decay time for non-accented notes
  • Accent control for wide range of decay time for accented notes
  • Filter Tracking control for filter frequency tracking of the current note
  • Overdrive control adds insane spice and edge to your sounds
  • Massive amount of CV and Gate in/outs for extreme creativity
  • 16-voice Poly Chain allows combining multiple synthesizers for up to 16-voice polyphony
  • Premium quality VRs featuring high resolution and metal shafts for long lifecycle
  • 15 controls and 33 switches to give you direct and real-time access to all important parameters
  • MIDI and USB implementation with MIDI channel and Voice Priority selection


Synthesizer Architecture

  • Number of voices: Monophonic
  • Type: Analog
  • Oscillators: 1
  • VCF: 1 low pass
  • Envelopes: 1


  • Power input: DC input connector
  • Power switch: Push button on/off
  • MIDI In/Thru: MIDI In and MIDI Thru, 5-pin DIN
  • USB (MIDI): USB 2.0, type B
  • Outputs: Line output: 1/4" TRS, unbalanced, max. +8 dBu
  • Output impedance: 1.5 k Ω
  • Headphones: 3.5 mm TRS, max. 50 mW/32 Ω (1 KHz, 1% THD)
  • Headphones output impedance: 15 Ω


  • Type: Class compliant USB 2.0, type B
  • Supported Operating Systems: Windows 7 or higherMac OS X 10.6.8 or higher
  • Inputs:
    • Filter in: -6 V to +6 V
    • Filter FM in: 0 V to +12 VFilter CV in: 0 V to +12 V
    • Accent in: off: 0 V, on: +12 V
    • Slide in: off: 0 V, on: +3.3 V
    • Gate in: off: 0 V, on: +3.3 V
    • CV in: +1 V to +5 V
    • Sync in: more than 2.5 V
  • Outputs:
    • Accent out: off: 0 V, on: +6 V
    • Gate out: off: 0 V, on: +12 VCV out: +1 V to +5 V (1 volt/oct)
    • Filter out: -400 mV to +400 mV

Power Requirements

  • External power adapter (use only the supplied adapter): 9 VDC 670 mA
  • Power consumption: 4 W max.


  • Operating temperature range: 5°C – 40°C (41°F – 104°F)


  • Dimensions (H x W x D): 56 x 305 x 165 mm (2.2 x 12 x 6.5")
  • Weight: 0.9 kg (2.0 lbs)
  • Shipping weight: 1.4 kg (3.1 lbs)

Watch: Behringer TD-3-MO - 'Modded Out' Edition


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