Doepfer A-138n Mixer

$59.19 Price Tier: Budget

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Page last updated Jun 09, 2026

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We compare 600+ stores and found this item at 1 store. Prices updated June 9, 2026.

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5.0 (1)

$59.19 6 available New

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Average Price: $59

Budget/Beginner

$149

$350+

Price Tier

In the Modular Synthesizers category, Doepfer A-138n Mixer 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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Elevate your modular synth setup with the Doepfer A-138n Mixer, a compact yet powerful tool designed to seamlessly blend multiple audio or control voltage signals into a cohesive soundscape. Ideal for both studio and live performance applications, this mixer offers a straightforward and intuitive interface, allowing musicians of all levels to effortlessly shape their sound. Its four-channel design ensures that you have ample room to experiment with different audio sources, while maintaining clarity and precision across the board.

The A-138n Mixer is renowned for its reliability and high-quality signal path, making it a staple in the modular synth community. Whether you're aiming to create lush, layered textures or precise rhythmic patterns, this mixer handles it all with grace. The smooth potentiometers provide fine control over each channel's level, giving you the ability to craft the perfect mix every time.

Join the ranks of musicians who trust the Doepfer A-138n for its versatility and performance. It's not just about mixing; it's about expanding your creative possibilities and pushing the boundaries of your sound.

Key Features:

Four-channel mixer for audio or control voltage signals
Compact and space-efficient design
High-quality signal path ensuring clarity and precision
Smooth potentiometers for precise level control
Suitable for both studio and live performance use

Product specs

Brand	Doepfer
Model	A-138n Narrow Mixer
Year	2010s
Made In	Germany
Categories	Eurorack Modules and Cases, Synth Modules
Horizontal Pitch	4HP
Modular Synth Format	Eurorack
Synth Module Function	Mixer

FAQs

How many input channels does the Doepfer A-138n Mixer have?: The Doepfer A-138n Mixer offers four input channels, allowing you to mix multiple audio or control voltage signals within your Eurorack modular setup.
What is the width of the Doepfer A-138n Mixer in a Eurorack system?: The Doepfer A-138n Mixer has a width of 4HP, making it a compact option that fits easily into most Eurorack systems without taking up much space.
Can the Doepfer A-138n Mixer be used for both audio and CV signals?: Yes, the Doepfer A-138n Mixer is designed to handle both audio and control voltage (CV) signals, providing flexibility for various modular synthesizer applications.
Is the Doepfer A-138n Mixer suitable for stereo mixing?: The Doepfer A-138n Mixer is primarily designed for mono mixing, as it has a single output channel. For stereo mixing, additional modules would be needed.
What is the primary function of the Doepfer A-138n Mixer in a modular synth setup?: The primary function of the Doepfer A-138n Mixer is to combine multiple audio or CV signals into a single output, allowing for easy signal management and sound sculpting in a modular synth environment.

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-138n Mixer.

Setup and maintenance

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Replacing chips and electrolytic capacitors may resolve sound issues if the mixer was previously mistreated or powered incorrectly.
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Testing power pins on sockets can help ensure correct voltage delivery to chips, crucial for proper functionality.
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Features and functionality

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Users experience a high-pitched whine from power supply bleed, particularly when using certain LFO modules.
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The A-147-2 VCDLFO's integrated VCA, LFO, and decay envelope offer versatile functionality, allowing for complex signal modulation without additional modules.
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The Doepfer A-138n is a compact 4hp 4-channel mixer with dual outputs, noted for its affordability around 50-60€.
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Build quality

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The top mix control can be scratchy and affect overall sound quality, especially past the noon position.
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Some users have experienced issues with Doepfer module jacks failing, indicating varying reliability in component longevity.
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User experience

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Buying used may require additional troubleshooting or component replacement due to potential prior mistreatment.
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The A-154-4 Quad LFO is valued for its dual frequency ranges, providing flexibility in modulating both slow and fast-moving parameters.
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Use cases and applications

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The A-126-2 Frequency Shifter is praised for its ability to create unique sound textures, ideal for experimental and ambient music.
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Matrix mixers are better suited for mixing modulation sources and creating feedback loops rather than for recording multiple outputs.
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Comparisons

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The A-138n Narrow Mixer is highlighted as a cost-effective option compared to larger mixers, making it suitable for compact setups.
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The Addac 802 quintet is preferred for individual outputs, but lacks internal panning, which users compensate for with additional panning mixers.
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Mods and upgrades

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The A-162 Trigger Delay can be modded to enhance its capability for creating nuanced effects like ratchet and delay slap, with DIY instructions available online.
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