AudioFu Chart · November 2026
Best Mixer, Attenuator Modules Under $100 2026
The top pick is Doepfer A-138b "EXP" Mixer with Logarithmic Pots ($66). Intellijel Designs Quadratt 1U leads the high end. Ranked by the AudioFu Index from 21 models across 7 brands, prices checked every night.
Last updated: November 4, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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Doepfer A-138b "EXP" Mixer with Logarithmic Pots
A-138b · Doepfer
7 for sale on Reverb12 finishes at Thomann
The A-138b is a straightforward, no-frills mixer that's perfect for anyone just starting out with modular synthesis or needing a simple audio summing solution. Its logarithmic potentiometers make it a breeze to manage levels, and the small size is a huge bonus in cramped racks. It's a workhorse module for basic signal blending.
Pros
- Log pots offer smooth, predictable gain staging.
- Compact 8HP footprint maximizes modular space.
- Robust Doepfer build quality ensures long-term reliability.
Cons
- Limited to two input channels; lacks more advanced routing.
- Logarithmic pots can be less flexible for certain modulation tasks.
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The Pico Mixer is a brilliant little utility module if you're tight on space and just need a clean, basic way to combine a few signals. It’s ideal for beginners getting into modular or anyone who needs a super-compact submixer for CV or audio. Don't expect a lot of fancy features, but it does exactly what it's supposed to, reliably.
Pros
- Extremely compact 3HP footprint saves precious rack space.
- Simple, clean signal path avoids unwanted coloration.
- Solid Erica Synths build quality feels robust for its size.
Cons
- Limited to three channels; not suitable for complex mixes.
- Lacks panning capabilities, restricting stereo image manipulation.
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The A-183-3 is a no-frills, reliable DC amplifier perfect for basic signal boosting and attenuation in modular setups. It's a workhorse for beginners getting their feet wet with modular synthesis or anyone needing a simple, clean gain stage – just be mindful of the DC coupling’s potential quirks.
Pros
- Robust Doepfer build quality ensures long-term reliability.
- Simple, clean amplification avoids unwanted coloration of signals.
- Switchable gain provides flexibility for various signal levels.
Cons
- Limited functionality compared to more complex mixer modules.
- DC coupling can introduce unwanted hum or offset with certain signals.
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Erica Synths Black Mixer / Splitter V2
Black Mixer/Splitter V2 · Erica Synths
7 for sale on Reverb1 finish at Thomann
The Black Mixer/Splitter V2 is a no-frills, incredibly compact utility module. It’s perfect for Eurorack users needing basic signal routing in a tight space, or for splitting a single signal to multiple destinations. Its simplicity and small size make it a great addition to any modular system.
Pros
- Extremely compact 4HP footprint maximizes modular space.
- Simple, clean signal path avoids unwanted coloration.
- Versatile input/output routing expands patching possibilities.
Cons
- Limited to 4 inputs, restricting larger mixer needs.
- No attenuators or other signal shaping features.
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The Quadratt is a deceptively simple but incredibly useful module for any Eurorack system. It's a fantastic way to tame unruly signals or create quick submixes without a full-blown mixer. Perfect for those wanting a clean, efficient, and affordable solution for signal management.
Pros
- Excellent normalization for quick submix creation and signal routing.
- Intelligent design minimizes noise and crosstalk between channels.
- Compact 1U format maximizes space in dense modular setups.
Cons
- Limited flexibility compared to more complex mixing modules.
- Power draw, while manageable, adds up in large systems.
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The Unity is a no-frills, incredibly efficient mixer perfect for Eurorack users who prioritize space and signal purity. It's a fantastic utility module for patching audio or CV signals cleanly, especially for those building smaller or more focused systems where every HP counts. It's a workhorse for anyone needing basic mixing without unwanted color or noise.
Pros
- Extremely compact, saving precious rack space in tight modular systems
- Unity gain design preserves signal integrity without coloration
- Normalization simplifies routing and patching workflows elegantly
Cons
- Limited to dual 3:1 mixers, restricting complex routing options
- Small size can make patching fiddly, especially with larger cables
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The Bytom is a brilliant little utility module for anyone building a Eurorack. Its triple-area design really shines when you need to combine and route multiple trigger and gate signals, and the compact size makes it perfect for smaller systems or those wanting to maximize space. A must-have for generative sequencing and complex rhythmic patterns.
Pros
- Excellent signal routing flexibility with its triple-area design.
- Compact 6HP footprint maximizes space in dense modular racks.
- Simple CV summation offers straightforward voltage mixing.
Cons
- Limited to gate/trigger signals – no audio processing capabilities.
- Area coupling switch can be a bit fiddly for complex routings.
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Behringer 305 EQ/
Mixer / Output Eurorack Synthesizer Module 305 EQ/Mixer/Output · Behringer
3 for sale on Reverb1 finish at Thomann
The Behringer 305 is a seriously clever little module for the price. It's perfect for beginners getting their feet wet in Eurorack or seasoned users needing a compact mixer and EQ solution. The integrated tuning oscillator is a neat bonus for quick checks and patching experiments.
Pros
- Four channels offer flexible signal routing and mixing possibilities
- Built-in EQ provides tonal shaping without external modules
- Tuning oscillator is a surprisingly useful utility for testing and calibration
Cons
- Plastic construction feels less robust than higher-end Eurorack modules
- Mono EQ is limited to input 1, restricting EQ versatility
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The A-183-2 is a handy little module for subtle voltage manipulation. It's perfect for anyone needing precise offset adjustments for their oscillators or filters without the complexity of a full-blown attenuverter. A solid, affordable choice for beginners and experienced modular users alike.
Pros
- Excellent offset control for subtle tonal shaping.
- Robust Doepfer build quality – reliable and durable.
- Compact 4HP footprint saves precious rack space.
Cons
- Limited functionality compared to more complex attenuators.
- 20mA power draw can add up in a large system.
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The A-183-5 is a beautifully simple and reliable attenuator – a real workhorse for any Eurorack setup. Perfect for anyone needing precise, repeatable level control across multiple signals, especially those focused on clean, subtractive synthesis or intricate modulation routing. It's a no-frills tool, but it does its job exceptionally well.
Pros
- Simple, passive design minimizes noise and complexity.
- Robust construction with Doepfer's characteristic quality metal chassis.
- Excellent for subtle signal shaping and level adjustments.
Cons
- Passive design limits functionality – no active gain or inversion.
- 4HP width can be restrictive in tightly packed modular systems.
All 21 mixer, attenuator modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Klavis TweakersKlavis · 2 finishes40Stable$82€73$82€73Check ↗
- 12
Intellijel Designs Att 1UIntellijel Designs38Stable$28€25$28€25Check ↗
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Intellijel Designs Stereo Mixer 1UIntellijel Designs38Stable$83€74$83€74Check ↗
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Intellijel Designs Duatt 1UIntellijel Designs37Stable$94€84$94€84Check ↗
- 15
XAOC Devices SopotXAOC Devices36Stable$99€89$99€89Check ↗
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Klavis Tweakers PlusKlavis36Stable$99€89$99€89Check ↗
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XAOC Devices KoninXAOC Devices36Stable$99€89$99€89Check ↗
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Rides In The Storm NGMRides In The Storm35Stable$59€53$59€53Check ↗
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Rides In The Storm MULRides In The Storm35Stable$61€55$61€55Check ↗
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Rides In The Storm XXMRides In The Storm35Stable$89€80$89€80Check ↗
- 21
Behringer CP3A-M MixerBehringer34Stable$32€29$32€29Check ↗
Mixer, Attenuator Modules by the numbers
Measured across all 29 models we track, not a sample.
Median $77 — half of all mixer, attenuator modules here cost less.
How to choose the best mixer, attenuator modules
Noise Floor
Seriously, this is critical. Even a little hiss can ruin a delicate patch. We're talking about modules that need to be quiet, especially if you're layering sounds or recording. A noisy module is a constant headache.
Attenuation Range & Accuracy
A good attenuator lets you dial in subtle changes in signal level - from barely audible whispers to full-blown screaming leads. Inaccurate attenuation throws off your signal balance and makes mixing a nightmare.
Routing Options
Most budget modules will be simple, but look for a little flexibility. Being able to invert signals, mix multiple sources, or use a module as a simple gain stage can open up creative possibilities.
Build Quality
Plastic cases are common at this price point, but listen for loose pots or wobbly jacks. A module that falls apart after a gig is not a good value, no matter how cheap it was initially.
Headroom
Can it handle a hot signal without clipping and distorting unexpectedly? Limited headroom means you'll be constantly battling gain staging, which is a major time sink.
Buying guide
Okay, so you're diving into modular synths but your bank account's looking a little thin? Mixer and attenuator modules are absolutely essential - you can't just patch signals directly, trust me. Finding quality ones under $100 requires some savvy, but it's totally doable. Let's break down what to look for without breaking the bank.
At this price, expect compromises. You're not getting boutique components or a ton of features. Often, the trade-off is build quality - the pots might feel a little cheap, or the case might be flimsy.
Prioritize a low noise floor above all else; a quiet module is far more useful than a feature-packed noisy one. Don't chase a ton of channels - a few well-designed channels are better than a bunch of mediocre ones.
How the AudioFu Index works
Five measured signals and nothing else — no stars from strangers, no “tested by experts” we didn’t do. The weights are fixed and public. We don’t play these instruments; we measure the market around them.
This chart covers 29 mixer, attenuator modules from the Thomann catalogue. Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
AudioFu earns a commission when you buy through our Thomann links. It never changes the order — the index does.
- Demand40%
How many of this exact model are for sale on Reverb right now — what musicians actually buy and resell.
- Lineup20%
How many finishes Thomann stocks — makers expand the models that sell.
- Price15%
Where the price has moved since we started tracking in August.
- Specs15%
How completely the maker documents it.
- Maker10%
How deep the brand’s range is in this category.
Questions
Are there any Eurorack clones that are actually good?
Some are decent, but be very wary. The cheap Chinese clones often have significantly higher noise floors and questionable component quality. Research the specific module carefully and read user reviews - look for mentions of noise or stability.
Can I use a regular audio mixer as a modular mixer?
Technically, yes, but it's a pain. Impedance mismatches and lack of proper attenuation will likely introduce unwanted coloration and noise. It's not ideal, but can work in a pinch if you're desperate.
What's the difference between an attenuator and a mixer?
An attenuator reduces a signal's amplitude. A mixer combines multiple signals. Many modules do both, but understanding the distinction helps when patching.
I'm seeing modules advertised as 'dual' or 'quad' - what does that mean?
It means the module contains multiple attenuators or mixers in a single unit. It's a space-saving way to get more functionality, but often at the expense of individual control over each channel.
Is it better to buy one really good module or several cheaper ones?
It depends. For a beginner, a few decent, reliable modules are better than one 'amazing' module that's prone to failure. As you get more experienced, you might prioritize quality over quantity.
