Pricing and availability
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Average Price: $157
Standard/Professional
$149
$350+
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Price History
Based on price data from 2 merchants for "Doepfer A-135-2 Quad VCA\Mixer". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Introducing the Doepfer A-135-2 Quad VCA/Mixer, a powerhouse of versatility in a compact 8HP Eurorack module. This module encapsulates four DC-coupled VCAs, each with its own set of controls, allowing you to seamlessly juggle between audio and control voltage signals. Whether you're layering musical textures or modulating control sources, the A-135-2 is your go-to companion.
Each channel is equipped with a manual level control and a CV input, making it a breeze to sculpt soundscapes or craft dynamic modulations like tremolos and swells. The stereo and quadrature operation options, selectable via internal jumpers, give you the flexibility to adapt to your creative needs—whether you're aiming for stereo width or intricate patching scenarios.
Perfect for the modular enthusiast who needs a space-saving yet high-functioning unit, this Quad VCA/Mixer offers a sum signal output for all VCAs while also allowing for individual channel manipulation. It's not just a mixer; it's a dynamic tool for expanding your sonic capabilities. Whether you're a seasoned synth wizard or just diving into the modular world, the Doepfer A-135-2 is ready to elevate your setup.
Key Features:
- Quad VCA with manual level controls
- DC-coupled inputs for both audio and control voltage signals
- 4 CV inputs for external signal level control
- Configurable for dual stereo or quadrature operations via internal jumpers
- Sum signal output alongside individual VCA outputs
- Compact 8HP Eurorack module design
Product specs
| Type | Quad VCA Eurorack Module |
| HP Size | 8HP |
| Power Supply | Requires Eurorack case and power supply |
FAQs
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What is the primary function of the Doepfer A-135-2 Quad VCA/Mixer?
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The Doepfer A-135-2 serves as a quad VCA and voltage-controlled mixer for Eurorack systems, allowing users to control the amplitude of audio or CV signals with precision.
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How many VCAs are included in the Doepfer A-135-2 module?
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The Doepfer A-135-2 includes four independent VCAs, making it versatile for mixing multiple audio or control voltage signals within a modular setup.
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What is the size of the Doepfer A-135-2 module in HP?
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The Doepfer A-135-2 module is 8HP wide, making it a compact addition to any Eurorack system.
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Does the Doepfer A-135-2 require a power supply?
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Yes, the Doepfer A-135-2 requires a Eurorack case with a compatible power supply to operate.
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Can the Doepfer A-135-2 be used for both audio and CV processing?
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Yes, the Doepfer A-135-2 is designed to handle both audio and control voltage (CV) signals, offering flexibility in sound design and modulation tasks.
Videos
VisionsMusicGroup
My Modular Journey - Season 1: Episode 18 (A-135-2)
My Modular Journey - Season 1: Episode 18 (A-135-2)
VisionsMusicGroup
Reviews
PROS
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Compact design, ideal for small systems
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Dual functionality as both VCA and mixer
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Selectable mix output with jumper for flexible routing
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Cascading input design for efficient signal chaining
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Allows for vector synthesis-style mixing via CV modulation
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Global CV option via jumper setting for unified control
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Excellent build quality, ensuring durability
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Summed output for space-saving mixing or layering sounds
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Affordable, offering great value for the money
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Possibility to use multiple units for expanded setup
CONS
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Crowded interface in compact setups
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CV input not cascading, limiting modulation possibilities
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Looser jack feel compared to other Doepfer models
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High signal levels can cause audio competition
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-135-2 Quad VCA\Mixer.
Features and functionality
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The Doepfer A-135-2 Quad VCA/Mixer can combine multiple module outputs into a single mix using the "all" output, which simplifies routing before sending to an interface.
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The A-135-1's separate controls for VCA offset and CV attenuation are deemed essential by some, though the input trimmer is often considered redundant.
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The ability to attenuate signals before the VCA on the A-135-1 helps prevent clipping and allows for precise control voltage trimming.
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Despite possible distortion, some users appreciate having the option to control when to introduce distortion for creative purposes.
Source
Mods and upgrades
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Adding an ALM HPO headphone output module enhances the Doepfer A-135-2 by enabling direct headphone monitoring, addressing the original lack of headphone connectivity.
Source
Setup and maintenance
Use cases and applications
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Users recommend integrating the Doepfer A-135-2 with an audio interface like the Behringer UMC404HD for volume control and recording via USB to a DAW like Ableton.
Source
User experience
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Owners transitioning from outboard gear to Eurorack mention a learning curve, but find the Doepfer A-135-2 useful for live improvisation setups with other synths.
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Users experience a "fighting" effect when multiple waveforms are summed, causing compression and reducing clarity in the output.
Source
Comparisons
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While not a direct headphone solution, the Mackie Mix 8 is suggested as a budget-friendly alternative for expanding mixing capabilities alongside the Doepfer module.
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The A-135-1's input trimmer is rarely used and is seen as similar in function to the VCA offset, offering limited additional utility.
Source
5.0 out of 5
Based on 1 Review and 2 Ratings
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565
Excellent Quad VCA/Mixer module
Doepfer stands for value for money, quality and accessibility at the same time. If I could, I would love to do an entire Doepfer eurorack modular gear, just assembled with that brand modules only! A-135-2 is perfect for my purposes: 8hp TE, quad VCA/CV Mixer with 4 attenuated CV inputs, 4 audio inputs and also 4 outputs plus 1 global output and also 1 dedicated output too. Absolutely affordable as performance. This is the second one I purchased, actually with the black panel (Vintage version). Turning back to the modular side, this is the first module I purchased for my new gear. Very recommended for limited budget and limited space rack. Thanks (sorry for my bad english).
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Genre Usage
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Used With
Based on how musicians on Equipboard use Doepfer A-135-2 Quad VCA\Mixer, it is most commonly used with the following gear.
Community setups
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Similar
Add recommendation1 alternative for Doepfer A-135-2 Quad VCA\Mixer, curated by the Equipboard community.
$143.00 - $145.29
Doepfer A-135-1 is a bit most expensive alternative version of A-135-2 with a more large panel (18hp) and biggest attenuator knobs.
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