Your Cart is Empty

Sold out


Behringer 1004 Oscillator Module Dual Core VCO

Pay With AfterPay Zip

Product Information

Modular Synthesis

The first 2500 series synth modules came out in the '70s and tended to be extremely expensive. They were mainly all discrete transistor designs with some op-amps as at the time op-amps were high cost. The discrete circuitry gave the modules a very distinctive sound and were used by artists like The Who, Jean Michel Jarre, Vangelis, Kraftwerk and so many more, giving us some of the greatest records and film soundtracks we’ve ever heard. Modular synths were a landmark development in electronic music and today, it’s about to get better.


This is the Behringer 2500 series OSCILLATOR MODULE 1004. An authentic reproduction of the original “System 2500” circuitry from the 70’s that can fit in a standard Eurorack case. The best part? It’s at a very affordable price. Mix the OSCILLATOR MODULE 1004 in with your existing rig or start your modular synth journey from here. Either way you’re sure to have a lot of fun.

Mix & Shape

The OSCILLATOR MODULE 1004 is a classic analog dual core oscillator module. The 1004 features discrete transistor circuitry to add vintage character and is equipped with coarse and fine frequency controls, frequency range switch, on/off switch, pulse width control, 3 modulation attenuators and best of all it features 3-position toggle switches for each waveform which can be set to inverted/off/non-inverted, all the enabled waveforms are mixed together to create complex waveform shapes and amazing sounds.

Ins and Outs

The 1004 gives you comprehensive connectivity, 1V/Octave keyboard input and two VCO modulation inputs, a pulse width modulation input and finally two parallel oscillator outputs to signal send to other modules.

Eurorack Ready

Installing the OSCILLATOR MODULE 1004 is easy as it is designed to fit into a standard Eurorack case. Just connect the power cable to the power supply and screw in the module using the included screws. This allows for the 1004 to be mixed with other synth modules for a truly unique set up.

Complete Your Setup

Whether you’re just getting into modular synths or looking to complete your collection, the OSCILLATOR MODULE 1004 from Behringer is a great tool to have when creating amazing music.

Get the OSCILLATOR MODULE 1004 from your local Behringer dealer today!

  • Classic 1004 dual analog VCO module from the 70s

  • Authentic reproduction of the circuitry from the 2500 Series

  • VCO features 5 waveforms: sine, triangle, square, sawtooth and pulse

  • Waveforms can be combined and inversed into the audio outputs

  • Output frequency range from 0.03 Hz to 16 kHz in 2 ranges

  • VCO range selectable between Low (LFO) or High (Audio)

  • Coarse frequency control allows adjustment over 10 octaves

  • Fine frequency control adjusts over +/- 1 octave

  • Frequency modulation with 2 inputs and controls responding to 1 V/octave

  • The width of the pulse waveform can be set manually and controlled dynamically

  • Eurorack specs: 16 HP, XX mA +12 V, XX mA -12 V


FM 1/2

2 x 3.5 mm TS jacks


50 kΩ, unbalanced

Max input level

10 V, 1 V/octave


3.5 mm TS jack


50 kΩ, unbalanced

Max input level

10 V, 1 V/octave


3.5 mm TS jack


50 kΩ, unbalanced

CV range

±10 V, 10% per volt


2 x 3.5 mm TS jacks


1 kΩ, unbalanced

Max output level

10 V p-p


Sets oscillator frequency (8 octave range)


Oscillator fine adjustment (±1 octave)


Select LFO (0.06 Hz - 16 Hz) or audio band (31 Hz - 8 kHz)


Oscillator on/of


Pulse width adjustment (5% - 95%)


Modulation depth adjustment (-∞ to unity gain)

FM 1/2

Attenuate FM inputs (-∞ to unity gain)

Waveform switches

Select up to 5 waveforms (sine, tri, square, saw, pulse)

Power supply


Current draw

60 mA (+12 V), 50 mA (-12 V)


46 x 81 x 129 mm (1.8 x 3.2 x 5.1")

Rack units

16 HP


0.17 kg (0.37 lbs)


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.