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Average Price: $137

Budget/Beginner

$149

$350+

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High-end

Price History

Based on price data from 1 merchant for "Befaco STMIX". Prices shown reflect NEW condition. Tracking began Apr 7, 2026.

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Description

The Befaco STMIX is your go-to solution for seamless integration into any Eurorack modular synthesizer setup. This versatile compact stereo mixer brings four channels of dynamic sound control, each with individual volume adjustment, allowing you to effortlessly balance both stereo and mono inputs. Perfect for both live performances and studio sessions, STMIX offers a stereo AUX input for added flexibility, making it a powerhouse in compact form.

Engineered with precision, the STMIX ensures pristine audio output with its stereo output featuring peak LED indicators to keep your levels in check. Whether you're layering complex synth textures or mixing intricate soundscapes, the STMIX provides the clarity and control needed for professional results. Its compact design fits snugly within a 6 HP space, maintaining the integrity of your compact setup without compromising on quality or functionality.

The STMIX is also designed with efficient power consumption in mind, requiring only +26 mA at +12 V and -26 mA at -12 V, making it an environmentally conscious choice for the modern musician. From its rugged build to its intuitive interface, the Befaco STMIX is a reliable partner for musicians who demand excellence in their modular systems.

Key Features:

  • Compact stereo mixer for Eurorack systems
  • 4 channels with individual volume control
  • Supports both stereo and mono inputs
  • Stereo AUX input for additional connectivity
  • Stereo output with peak LED indicators
  • Power requirements: +26 mA (+12 V) / -26 mA (-12 V)
  • 6 HP width for efficient space utilization

Product specs

Available since June 2019
Modul Type Stereo
Width 6 TE / HP

FAQs

What is the primary function of the Befaco STMix in a modular synthesizer setup?

The Befaco STMix serves as a compact stereo mixer for modular synthesizer systems, allowing users to mix multiple audio signals into a stereo output, which is ideal for creating complex soundscapes.

How many channels does the Befaco STMix provide for mixing?

The Befaco STMix offers four stereo input channels, enabling users to blend multiple audio sources within a modular setup efficiently.

Does the Befaco STMix support mono inputs?

Yes, the Befaco STMix can handle mono inputs, which are internally converted to stereo, offering flexibility in mixing both mono and stereo signals.

What is the width of the Befaco STMix module in a Eurorack system?

The Befaco STMix module is 6 TE/HP wide, making it a space-efficient option for modular synthesizer setups.

Is the Befaco STMix suitable for live performances?

Yes, the Befaco STMix is designed for both studio and live performance environments, providing quick and easy access to mixing controls in a compact format.

DivKid

DivKid

Befaco STMIX // 6HP stereo audio or CV Eurorack mixer

Video thumbnail for Befaco STMIX // 6HP stereo audio or CV Eurorack mixer by DivKid

Befaco STMIX // 6HP stereo audio or CV Eurorack mixer

DivKid

DivKid

Video thumbnail for Kit Overview # 38 : Befaco STMIX by Synth Diy Guy

Kit Overview # 38 : Befaco STMIX

Synth Diy Guy

Synth Diy Guy

Video thumbnail for BEFACO STMIX - A Very AFFORDABLE, Straight Forward, Stereo Mixer by GARDNSOUND

BEFACO STMIX - A Very AFFORDABLE, Straight Forward, Stereo Mixer

GARDNSOUND

GARDNSOUND

Reviews

PROS

  • Integrates seamlessly with Hexmix and Hexpander for expanded mixing capabilities

  • Offers 5 stereo inputs, maximizing connectivity in a compact setup

  • Individual volume control for 4 inputs, enhancing mixing precision

  • Mono signals are automatically normalized to stereo, simplifying connections

  • Small footprint (6HP), ideal for Eurorack format and portable setups

  • Excellent build quality, ensuring durability and reliability

CONS

  • Lacks a mute switch for each stereo channel, limiting live performance flexibility

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Befaco STMIX.

Features and functionality

  • Users successfully run Befaco StMix directly into mixers and interfaces, but caution is advised to keep channel levels lower to prevent overloading inputs.

    Source
  • Users note a significant volume increase when a dummy cable is plugged into the right jack of mono channels, suggesting an unusual input behavior.

    Source
  • The module's input impedance, potentially due to 10k resistors, may cause perceived changes in sound level when varying input configurations are used.

    Source
  • Owners note a potential left-right signal imbalance due to dual potis, but it's often subtle enough to require meters for detection.

    Source

Use cases and applications

  • The lack of a dedicated volume control on the Befaco StMix is noted, but adjusting channel levels offers a workaround for managing output levels effectively.

    Source
  • Users running their StMix directly into a headphone output module without panning options prefer mixers like the Knobfarm Hyrlo for better balance control.

    Source

Mods and upgrades

  • Adding an external volume control module, such as a slider-based headphone output, enhances output level management without occupying additional rack space.

    Source
  • It's suggested that adding a fine-tune trimmer can correct left-right balance issues; the Befaco StMix schematic is freely available for DIY adjustments.

    Source

User experience

  • Variability in perceived volume changes across different units suggests potential differences in build or modifications, as noted by one owner experiencing the opposite effect.

    Source
  • Some users find the StMix essential for stereo setups due to its compact 6HP size, despite minor balance issues.

    Source

Setup and maintenance

  • Users discuss potential DIY origins affecting behavior, emphasizing the importance of checking the module's construction if purchased second-hand.

    Source

Comparisons

  • Users compare the StMix to the Happy Nerding 4x St. Mix, with some preferring the latter for live settings due to better channel balancing options.

    Source

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