Pricing and availability

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Reverb
$145.29 New
$125.48 Used
Thomann
4.9 (25)
$144.00 $143.00 $1.00 · All time low

Average Price: $138

Budget/Beginner

$149

$350+

Price Tier

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Standard

High-end

Price History

Based on price data from 1 merchant for "Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer". Prices shown reflect NEW condition. Tracking began Apr 7, 2026.

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Description

Elevate your modular synth setup with the Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer, a versatile powerhouse that seamlessly fits into any Eurorack system. This module is a must-have for sonic explorers looking to add dynamic control and mixing capabilities to their rig. Designed for flexibility, the A-135-1 features four independent linear VCAs that can work together as a voltage-controlled mixer. Whether you're sculpting complex patches or refining your live performance, this module offers the precision and control you need.

With four signal inputs and corresponding CV inputs, the A-135-1 allows for unparalleled modulation possibilities. Each VCA can independently process signals, ensuring clean and articulate sound shaping. The module's intuitive layout and robust build make it an ideal choice for both beginners and seasoned synth enthusiasts. Thanks to its compact 18 HP design, it integrates smoothly into any existing setup without hogging valuable rack space. Enhance your sound palette and explore new creative horizons with the Doepfer A-135-1.

Key Features:

  • 4 x signal inputs and 4 x CV inputs for versatile modulation
  • Outputs include main signal out and 4 individual outs for detailed sound routing
  • Compact design with a width of 18 HP and depth of 50 mm
  • Current consumption: +60mA (+12V) / -50mA (-12V) for efficient power use
  • Ideal for dynamic control in modular synth setups

Product specs

Available since July 2013
Modul Type Mono
Width 18 TE / HP
linear 1

FAQs

What is the primary function of the Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer?

The Doepfer A-135-1 functions as a quad linear VCA and voltage-controlled mixer, allowing you to control the amplitude of audio or CV signals, making it ideal for dynamic signal processing in modular synthesizer setups.

How does the linear response of the Doepfer A-135-1 affect its performance?

The linear response of the Doepfer A-135-1 ensures that the control voltage directly affects the amplitude linearly, providing precise control over audio dynamics and CV modulation, which is ideal for applications requiring consistent and predictable signal scaling.

What is the width of the Doepfer A-135-1, and why is it important?

The Doepfer A-135-1 has a width of 18 TE/HP, which is important for planning your Eurorack modular setup, as it determines how much space the module will occupy in your rack.

Can the Doepfer A-135-1 be used for mixing audio signals in a modular synth setup?

Yes, the Doepfer A-135-1 can mix multiple audio signals, making it a versatile tool for creating complex soundscapes and layering different audio sources within a modular synthesizer system.

Raul's World of Synths

Raul's World of Synths

Doepfer A135-1 QVCA/VCMIX basics

Video thumbnail for Doepfer A135-1 QVCA/VCMIX basics by Raul's World of Synths

Doepfer A135-1 QVCA/VCMIX basics

Raul's World of Synths

Raul's World of Synths

Video thumbnail for Doepfer A135 Quad Linear VCA/ Voltage Controlled Mixer Audio Demonstration One by Raul's World of Synths

Doepfer A135 Quad Linear VCA/ Voltage Controlled Mixer Audio Demonstration One

Raul's World of Synths

Raul's World of Synths

Video thumbnail for Doepfer A135 Quad Linear VCA/ Voltage Controlled Mixer Audio Demonstration Two by Raul's World of Synths

Doepfer A135 Quad Linear VCA/ Voltage Controlled Mixer Audio Demonstration Two

Raul's World of Synths

Raul's World of Synths

Reviews

PROS

  • Excellent value for the price

  • Robust build quality, likened to "old Russian tanks"

  • Versatile voltage-controlled mixer capabilities

  • Allows combining of various external CV sources

  • Useful normalization options, though via jumpers

  • Straightforward functionality without unnecessary complexity

CONS

  • Large size at 18 HP, not compact

  • Heavy for mobile setups

  • Potentiometers are typically stiff in operation

  • Initial quality control issues reported by some users

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer.

Features and functionality

  • The A-135-1 Quad Linear VCA is noted for its effectiveness in achieving West Coast complex oscillator sounds when combined with A-110-4, A-110-6, and A-137-1 modules.

    Source
  • Multiple owners suggest the A-135-1 is a valuable component in an all-Doepfer system, providing essential mixing and amplitude modulation capabilities.

    Source

User experience

  • Some users prefer the A-135-2 for its additional features over the A-138 mixer and VCMix, suggesting a swap for enhanced functionality.

    Source

Mods and upgrades

  • It's recommended to consider the A-172 Maximum/Minimum Selector and A-183-2 for more complex voltage processing, enhancing the modular setup's versatility.

    Source

Comparisons

  • The A-110-6 is favored over the A-110-2 for its LFO switch feature, providing more utility as both an oscillator and LFO.

    Source

Use cases and applications

  • The A-135-1 is considered essential for those seeking to create evolving timbres not achievable with traditional synths like the Moog Grandmother.

    Source

5.0 out of 5

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Artist usage

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See how Caterina Barbieri uses Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer

Caterina Barbieri

Guitarist, Keyboardist

...
Verified via SYNTH ANATOMY

Compact Eurorack Setup With Many Possibilities. At the moment the setup consists of Make Noise and Doepfer modules as well as the excellent Verbos oscillator. Make Noise 208hp 7U Steel CV Bus Case Make Noise Maths Make Noise Wogglebug Orthogonal Devices ER-101: Indexed Quad Sequencer Doepfer A-140 ADSR Make Noise Echophon Make Noise Erbe-Verb Make Noise TEMPI Make Noise DPO Verbos Electronics Harmonic Oscillator A-105 24dB SSM Low Pass Filter A-135-1 Voltage Controlled Mixer / Quad VCA A-147 Voltage Controlled Low Frequency Oscillator VCLFO

See how Firechild uses Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer

Firechild

Keyboardist, Composer

...
Verified via YouTube

can be seen at 1:15 in the video

See how Gh0stlyn uses Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer

Gh0stlyn

Music Producer

...
Verified via Photo

in this photo you can clearly see Ghostlyn uses Doepfer A-135-1

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer, it is most commonly used with the following gear.

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MOTU Ultralight MK3
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1
Make Noise Erbe-Verb
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1
Make Noise Tempi
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1
Make Noise DPO
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1
Grendel Formant Filter
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1

1 alternative for Doepfer A-135-1 Quad Linear VCA/Voltage Controlled Mixer, curated by the Equipboard community.

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