• Home
  • Behringer Abacus Analog Music Computer for Eurorack

Behringer Abacus Analog Music Computer for Eurorack



UK Delivery - from £4.99

Free & Next Day delivery to most UK locations when spending over £149

Earn 95 Loyalty Points

Earn one point for every £1 you spend.

Click and Collect

Available to collect by request.
Looking to try or buy at our Guildford store?
How does click and collect work at Andertons?

SKU: 0720-ACO86-001

Product Description

Buchla's legendary 257 and 281 analog synthesizers are considered classics of their genre, implemented in a wide range of musical applications. The Behringer ABACUS is modelled after these original instruments, featuring an array of linear, logarithmic and exponential triggered or continuous functions.

Modulate & Push The Tempo

The ABACUS can generate musical envelopes or LFO signals up to 25 minutes in length and as fast as 1 kHz. Designed for use with other modules, it also allows you to change the modulation depth, modulate backwards and create even more musical events by manipulating tempo.

Unlimited Creativity

By manipulating the ABACUS’ control knobs, incoming signals can be an amplified, attenuated, integrated or inverted for unlimited creativity. Totally unique and crazy warped effects like lag, slew or portamento can be applied to control voltages perfect for use with a sequencer, or synth keyboard. Up to 4 control voltages can be combined to generate even more complex modulations.

Eurorack Ready

ABACUS is designed to fit into a standard Eurorack case. Just connect the power cables to the power supply and mount the module using the included screws. This allows for ABACUS to be mixed with other synth modules for a truly unique set up.


  • Power Consumption: 60 mA +12 V / 50 mA -12 V


  • CV 1-4, Trig 1-4, Rise 1 & 4, Fall 1 & 4
  • Both 1 & 4, Cycle 1 & 4: 3.5 mm jack


  • CV 1-4, OR, SUM, INV, ƒ1 & 4, 1 EOR, 4 EOC
  • 3.5 mm jack


  • 1 & 4 Rise, 1 & 4 Fall, 1 & 4 Response knobs
  • 1 - 4 attenuverter knobs
  • 1 & 4 Cycle buttons


  • Rise & Both CVs: 100 kΩ
  • Fall CVs: 33 kΩ
  • CV Inputs 1 & 4: 33 kΩ
  • CV Inputs 2 & 3: 75 kΩ
  • Trigger Inputs: 100 kΩ
  • Cycle Trigger Inputs: 50 kΩ
  • Outputs 1-4, INV, SUM, OR: 680 Ω
  • EOR/EOC: 2.2 kΩ
  • ƒ 1 & 4: 100 Ω


  • Trigger 1 & 4: 4 V minimum
  • Cycle 1 & 4: 1.8 V minimum


  • 20 hp
  • 10 cm x 12.8 cm x 2.4 cm
  • (3.94 " x 5.04 " x 0.94 ")


  • Weight: 191 g (6.74 oz)
  • Packaged Weight: 284 g (10.02 oz)
CV Compatible

Customer Reviews


3 reviews





Mr Dennis Kostovic21st Oct 2023

I love Behringer products, no matter what other people say about them. This one is fantastic!

Value 5Looks 5Durability 5Sound 5

Mr Nicolas Bret29th Jul 2023

Trusted Customer20th Jul 2023

Incredible value for the money, a very versatile module, a must have. Works exactly like the module it's cloned from, no issues. Although I wish the attenuator knobs could be bigger by design, it is possible to add larger knobs from Thonk on to them at a small cost.

Value 5Looks 4Durability 4

Finance available at checkout for orders £300+

How do I use instant finance?

It's simple! Just add the products you want to your basket and click the "Checkout" button in your basket. Go through the checkout process and tick the "Finance" option under "Select Your Payment Method". You can then choose which finance term you'd like to apply for, and change your deposit if you wish.

At the end of the checkout you'll be taken to the V12 Finance web site. This is where your finance application is processed. Assuming your application is accepted you'll be able to place your deposit and confirm your order right there.

Then, your order will come through to Andertons and we'll send you the goods. Get approval before 3pm and we'll send your order out the same working day (stock permitting) for next working day delivery!

Who can apply for finance?

You must: spend over £300, be at least 18 years of age, have been a UK resident for 3 years or more, be able to make repayments by Direct Debit, be in regular employment (minimum of 16 hours per week) including self-employment, or in permanent residence with your partner who is in regular employment.

Read More About Online Finance

Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.