Doepfer A-135-5

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Eurorack Module

Polyphonic mixer and sub-octave generator
3 Channels (A, B, C) each with 4 inputs for polyphonic oscillators such as Doepfer A-111-4 (article no. 435434)
Level control, mute switch and VCA with CV input and attenuator per channel
Square sub-octaves are generated from the 4 signal inputs of channel A and normalised to the inputs of channel B
Four group outputs and a sum output
Suitable for audio signals and control voltages
Power requirement: 50mA (+12V) / 40mA (-12V)
Width: 10 U
Depth: 55 mm

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3-Year Thomann Warranty

Available since December 2023
Item number 582316
Sales Unit 1 piece(s)
Modul Type Mono
Width 10 TE / HP
linear Yes

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in Mixer, Attenuator Modules

1 Customer ratings

5 1 Customer 4 0 Customers 3 0 Customers 2 0 Customers 1 0 Customers

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1 Review

Last line of defence in your polyphonic setup

SurreyMuso 24.09.2026

Doepfer have quite a range of polyphonic modules. The first batch were introduced in 2018 and were little more than basic MIDI-VCO-VCF-VCA-ADSR, albeit nicely integrated, and taking up a lot less space than separate modules.

First shipped in 2024, the A-135-5 joined another recently added module (poly slew limiter A-171-4) and it gives you a really tidy mixer but with sub-oscillator as well. If you are into your evolving drones, the A-135-5 is a must have, since you can use this to fade in the different layers via CV with added bass richness.

The subharmonic addition is just one octave, so not as flexible as the A-113 subharmonic generator but the latter takes a lot of space, especially in a live rack so the compromise is well worth keeping some spare HP.

If you're a drone maniac and have a small case just for evolving low loveliness, the A-135-5 will fit in really well. If you have a polyphonic setup then this is really useful and integrates well because you can connect it to other poly modules via Dupont/Arduino jumper wires on the rear, meaning you don't have to clutter up the front panel. Even if you do set up the jumper wires, the front sockets are still usable and override the rear cables.

Very happy to have this in my rack

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