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

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Product Information

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-BK, an ultra-affordable and faithful homage to the iconic synthesizer that’s capable of creating some fiery basslines and much more now in a sleek black enclosure.

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


Pure Analog Signal Path

Great care has been taken in engineering the TD-3-MO-BK, including the true to the original VCO, VCF and VCA designs and pure analog circuitry with matched transistors. This highly-focused attention to detail is what gives TD-3-MO-BK its ultra-flexible sound shaping capability, which covers a wide spectrum for you to create some super-funky bass lines and pounding rhythms that can keep you, and the crowd, grooving all night long.

Rock Right Out of the Box!

Your TD-3-MO-BK comes ready to rock, thanks to its default signal routing that doesn’t require lifting a single patch cable to instantly create amazing sounds. The highly-intuitive layout lets you easily tap into the inspired sounds of 1980s and ’90s wave, EDM and synth-pop music tracks that made history – or to design incredibly fat and original sounds that will make you a legend in your own right!


Synthesizer Architecture

Synthesizer Architecture

  • Number of voices: Monophonic
  • Type: Analog
  • Oscillators: 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 kΩ
    • Headphones: 3.5 mm TRS, max. 50 mW/32 Ω (1 KHz, 1% THD)
    • Headphones output impedance: 15 Ω
  • USB Type: Class compliant USB 2.0, type B
  • Supported Operating Systems:
    • Windows 7 or higher
    • Mac OS X 10.6.8 or higher

Inputs and Outputs (TS 3.5 mm)


  • Filter in: -6 V to +6 V
  • Filter FM in: 0 V to +12 V
  • Filter 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


  • Accent out: off: 0 V, on: +6 V
  • Gate out: off: 0 V, on: +12 V
  • CV out: +1 V to +5 V (1 volt/oct)
  • Filter out: -400 mV to +400 mV


3 Years Warranty

Shipping & Delivery

All orders over $100 will be automatically eligible for FREE Shipping Australia Wide, if you order is under $100 there will be a flat rate of $10.

Belfield Music is well known for its top online customer service. We treat all online customers with the same excellent service we give to our in store customer. We will ensure that you receive all the support you need while your goods are in transit and ensure the goods arrive promptly. All of our shipments have tracking numbers available and we cover every single unit by our own shipping insurance.     

Online orders are normally processed within 1-3 business days. Once processed, your order should take between 1-8 business days to arrive depending on your location. Please note that your order may take up to 10 business days to arrive from the day you place your order. 

If it transpires that the product is out of stock due to a stock discrepancy and/or there will be a delay in shipment, we will contact you within 2 business days of placing your order and give you the option of waiting or cancelling your order. The products we advertise online should show if they are in stock or not. We do our best to keep the website stock count up to date, but there may be an occasional error.

If you wish to utilize an Express Delivery Service to receive your item, please contact us for a shipping quote before you place your order at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.           

Deliver is made during the hours from 8:00am till 5:30pm Monday to Friday. As such, please ensure you nominate an address which is capable of receiving goods during 8am and 5.30pm.  Given the restrictions on PO Box deliveries we cannot deliver larger sized items to a PO Box.

If for any reason our selected carriers don't service your area we will contact you before processing your order if this applys to you.

Returns Policy

If you wish to return an item which is not damaged or faulty in any way and you have simply changed your mind or made the wrong decision, you must let us know within 7 days of receiving the item.  We will not agree to refund an item because you simply changed your mind or made the wrong decision if we have not been advised of your intention within 7 days of receiving your item. Once we have provided a return authority, it is the buyer’s responsibility to return the item, at their own costs within 30 days from original purchase. If the item is returned with any damage or alteration to its original packaging, we will refund the item subject to applying a minimum 15% restocking fee.  We will not refund the costs of the initial shipping charges.

It is in Belfield Music best interests to keep our customers happy with their purchases. If you are not happy with your purchase, please talk to us first. We will always attempt to resolve any problems you may have as best we can. To contact us please email us at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.