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Doepfer A-131 Exponential VCA

$72.00 to $92.00 Price Tier: Budget

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Page last updated Jun 30, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated June 30, 2026.

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$92.00

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$73.44 3 available New

$50.00 2 available Used

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4.6 (38)

$73.00 $72.00 $1.00 · All time low

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Average Price: $72

Budget/Beginner

$149

$350+

Price Tier

In the Modular Synthesizers category, Doepfer A-131 Exponential VCA is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

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Description

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The Doepfer A-131 Exponential VCA is a versatile and essential component for any Eurorack modular synthesizer setup. Perfectly balancing affordability and functionality, this module is designed to bring your audio signals to life with precision and control. With its compact 8HP width, the A-131 fits seamlessly into any rig, making it a go-to choice for both beginners and seasoned modular enthusiasts.

The A-131 features dual audio inputs, each equipped with independent attenuation controls, allowing you to shape your sound with accuracy and finesse. This flexibility extends to its dual CV inputs, enabling amplitude modulation through a combination of control voltage signals. One of these CV inputs is fitted with its own attenuator, giving you the freedom to blend CV sources for a dynamic and customizable sound experience.

Whether you're looking to modulate complex waveforms or simply control your audio levels with precision, the A-131's exponential response ensures that your sound remains crisp and clear. Its straightforward interface and reliable performance make it a staple in any modular setup, providing the perfect balance of power and simplicity.

Key Features:

8HP width, ideal for any Eurorack modular synthesizer setup
Dual audio inputs with independent attenuation controls
Exponential response for precise control over audio signals
Dual CV inputs for flexible amplitude modulation
Exclusive attenuator on CV2 input for mixing CV sources
Power requirements: +20 mA (+12 V) / -10 mA (-12 V)

Owner's manual

Doepfer A-131 Exponential VCA User Manual

Product specs

Type	VCA Eurorack Module
Depth	1.58" (40.3mm)
HP Size	8HP
Power Supply	Requires Eurorack case and power supply

FAQs

What is the primary function of the Doepfer A-131 Exponential VCA?: The Doepfer A-131 Exponential VCA is designed to control the levels of audio signals in a modular synthesizer setup, providing exponential voltage control over amplitude.
How many inputs does the Doepfer A-131 Exponential VCA have?: The Doepfer A-131 Exponential VCA features two signal inputs, allowing it to function as a utility mixer in addition to its primary VCA role.
What is the size of the Doepfer A-131 Exponential VCA in HP?: The Doepfer A-131 Exponential VCA is 8HP wide, making it compact enough to fit easily into most Eurorack systems.
Does the Doepfer A-131 Exponential VCA require a specific power supply?: Yes, the Doepfer A-131 Exponential VCA requires a standard Eurorack case and power supply to operate.
Can the Doepfer A-131 Exponential VCA be used in a live performance setting?: Yes, the Doepfer A-131 Exponential VCA is suitable for live performances, offering manual gain control for dynamic audio manipulation.

Videos

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Raul's World of Synths

Doepfer A131 VCA Intro

Raul's World of Synths

Processing CV with Doepfer A131 EXP VCA Part One

Raul's World of Synths

Amplitude Modulation with Doepfer A131 EXP VCA

Raul's World of Synths

Processing CV with Doepfer A131 EXP VCA Part Two

Raul's World of Synths

Reviews

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PROS

Designed specifically for amplifying audio signals
Features two separate CV inputs, enhancing modulation flexibility
Includes two individual audio inputs with attenuators
Offers more functionality than a simple VCA
Entry-level price point offers good value
Durable input jacks and potentiometers
Ideal for beginners to understand signal flow

CONS

Not suitable for modulating control signals (CV) as effectively as other models
Lacks independent VCA routing compared to models like the A-132-3

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-131 Exponential VCA.

Features and functionality

0 0

The Doepfer A-131 uses high-quality VCA chips (THAT2159/V2159/SA2159), resulting in equivalent performance to other high-end VCAs using similar chips.
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0 0

The A-190.2 MIDI-CV converter is a budget-friendly option for integrating MIDI into a modular setup.
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Comparisons

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Compared to multi VCA modules, single VCAs like the Doepfer A-131 offer more control options such as response curve and drive, making them preferable for audio signals.
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0 0

The Pittsburgh mixer, at a similar price, offers more flexibility with breakout channels for attenuators compared to the Doepfer A-138b.
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The Borg 2 filter is preferred over the Doepfer A-120 for its dual functionality as a low pass gate and multimode filter.
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Intellijel VCAs are suggested as superior alternatives to the Doepfer A-131 for broader functionality and quality.
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User experience

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Owners mention the A-131 is suitable for CV processing but may sound muddy with audio signals, suggesting it's better for control voltage tasks.
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Value and pricing

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The A-131 can be found for as low as £30 on resale platforms, making it an attractive budget option for expanding a modular setup.
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Use cases and applications

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The A-131 is noted to be effective in scenarios requiring multiple VCAs, such as controlling fast clock streams to trigger sequencers, adding versatility to modular systems.
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Software and compatibility

0 0

Tiptop stackcables are a viable alternative to multiples, allowing more flexible patching in modular systems.
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Legowelt

Music Producer

Verified via Photo

In the provided photo from Legowelt, the Doepfer A-131 Exponential VCA is visible as the fourth item from the left on the bottom row, despite the image being slightly blurry.

Kazumoto Endo

Music Producer

Verified via Photo

In a screenshot from an Instagram story, the Doepfer A-131 Exponential VCA can be clearly seen as part of Kazumoto Endo's modular setup.

Afterlife

Music Producer

Verified via Facebook

In a studio tour video posted on Facebook, Steve Miller, known as Afterlife, showcases his collection of instruments, including a Doepfer A-131 Exponential VCA.