Best Mixer, Attenuator Modules 2026
Okay, so you're diving into modular? Smart move. But a pile of oscillators and filters sounds like chaos without a good mixer and attenuator module. Seriously, these aren't just 'utility' - they're the glue that makes your patches sing, the volume knobs that let you actually hear the subtle nuances, and the crucial control points that keep things from getting completely out of hand. Let's break down what you need to know.
Last updated: September 4, 2026
⚡ The best mixer, attenuator modules in 2026 are Frap Tools CGM Quad Stereo Channel (top pick), Neuzeit Instruments Quasar for tighter budgets, and XAOC Devices Ostrawa for pros — selected from 15 options across 12 brands, priced $335–$614, ranked by brand, price and popularity.
Frap Tools CGM Quad Stereo Channel
by
Frap Tools
CV Processing
Signal Mixing
Modulation Shaping
Key Feature:
The Frap Tools CGM Quad Stereo Channel is a seriously well-engineered mixer module. It’s perfect for those building larger, more complex modular systems who need precise control and flexible routing—especially if you're already invested in the CGM ecosystem. The CV control is a real highlight, allowing for incredibly dynamic and evolving mixes.
PROS
- • Exceptional build quality with robust metal chassis and tight tolerances
- • Flexible aux sends offer extensive routing possibilities for complex signal chains
- • CV control over multiple parameters unlocks expressive, dynamic mixing
- • Standalone operation expands modularity beyond the CGM system
CONS
- • 18HP footprint can be restrictive in smaller modular setups
- • Power draw is relatively high, demanding a powerful PSU
- • Limited EQ capabilities necessitate external processing for detailed shaping
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
9/10
Value:
5/10
Art. 509994
$614
Neuzeit Instruments Quasar
System Utility
Level Control
CV Processing
Key Feature:
The Quasar is a seriously cool module for sound designers and experimental musicians who want to craft believable 3D audio. It’s a complex beast, but the ability to individually sculpt the spatial characteristics of each input is mind-blowing – perfect for creating evolving soundscapes and unique effects.
PROS
- • Exceptional binaural processing creates genuinely immersive, spatial audio landscapes.
- • Flexible signal routing offers immense creative possibilities for sound design.
- • Intuitive OLED display and encoders streamline complex parameter adjustments.
- • Neuzeit's build quality is superb; feels robust and well-engineered.
CONS
- • 16 TE width can be restrictive in smaller Eurorack cases.
- • Steep learning curve; mastering the spatial parameters takes dedication.
- • Power consumption, while manageable, is higher than some simpler modules.
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
10/10
Value:
5/10
Art. 549673
$556
XAOC Devices Ostrawa
by
XAOC Devices
CV Processing
Level Control
Signal Mixing
Key Feature:
The Ostrawa is a beautifully designed and sonically transparent stereo mixer. It's a fantastic centerpiece for complex modular setups, especially those emphasizing spatial audio and dynamic control—perfect for ambient soundscapes, experimental electronic music, or anyone needing pristine stereo summing. It's a high-end component that truly elevates a modular system’s sonic potential.
PROS
- • Exceptional stereo imaging due to careful circuit design.
- • Aux sends provide flexible routing for external effects.
- • CV control over level and balance enables dynamic mixing possibilities.
- • Build quality is superb; feels robust and well-engineered.
CONS
- • 20HP footprint can be limiting in smaller modular systems.
- • Lacks EQ or tone shaping capabilities, purely a mixer.
- • Price point positions it as a premium investment for serious modular users.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
5/10
Art. 567989
$556
XAOC Devices Praga
by
XAOC Devices
Audio Combining
System Utility
CV Processing
Key Feature:
The Praga is a beautifully designed, sonically clean mixer that's perfect for Eurorack users serious about stereo imaging. It's a great central hub for complex modular patches, particularly those involving multiple sound sources needing precise volume and panning control. If you’re building a serious, stereo-focused modular system, this is a must-have component.
PROS
- • Excellent headroom, handles hot signals with ease
- • AUX sends offer flexible routing for effects chains
- • Intuitive layout simplifies complex stereo mixing tasks
- • Solid build quality; feels robust and well-engineered
CONS
- • Power consumption is relatively high for a mixer module
- • Limited routing options compared to more expansive modular mixers
- • 20HP footprint can be restrictive in smaller racks
⭐
4.7/5
AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
5/10
Art. 444493
$533
NANO Modules Performance Mixer
by
NANO Modules
Level Control
Modulation Shaping
CV Processing
Key Feature:
This NANO Modules Performance Mixer is a seriously useful tool for Eurorack users wanting hands-on control and automation. It's ideal for live performers and studio engineers needing precise level adjustments and flexible routing – the CV looper alone makes it a standout. It’s a premium-priced mixer that brings a lot of performance-oriented features into a compact footprint.
PROS
- • Excellent CV looper offers real-time performance automation.
- • Faders feel solid and responsive; a noticeable quality upgrade.
- • Stereo effect returns provide flexible routing options.
- • Compact size maximizes rack space without sacrificing features.
CONS
- • Limited mono channel count might restrict complex stereo setups.
- • Build quality, while good, feels slightly plasticky for the price.
- • Cue output level control could benefit from finer resolution.
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
10/10
Value:
5/10
Art. 579657
$528
Cosmotronic Cosmix Pro Black
by
Cosmotronic
System Utility
Audio Combining
CV Processing
Key Feature:
The Cosmix Pro Black is a seriously useful little mixer for Eurorack setups. It's a well-built, compact solution for managing multiple signals, and the aux sends are a great bonus for adding external effects. This is perfect for modular synth enthusiasts who need a clean, efficient way to route and process audio without breaking the bank.
PROS
- • Solid build quality with robust faders; smooth, musical EQ shaping; versatile aux sends for external effects; compact depth saves valuable Eurorack space
CONS
- • Limited headroom at higher levels; panorama CV inputs lack fine-tuning control; mono effect return lacks dedicated level control
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
5/10
Art. 553538
$487
Cosmotronic Cosmix Pro Silver
by
Cosmotronic
Signal Mixing
System Utility
Level Control
Key Feature:
The Cosmix Pro Silver is a seriously useful addition to any Eurorack setup, especially if you're juggling a lot of signals. It's well-built with those faders, making it a joy to use, and the metering is surprisingly helpful. This is perfect for experimental electronic musicians and sound designers needing a compact, hands-on mixing solution.
PROS
- • Excellent channel density for a compact Eurorack module.
- • Faders offer tactile control absent in many digital mixers.
- • Aux sends provide flexible routing for effects and external processing.
- • Illuminated metering is a genuinely useful, high-end touch.
CONS
- • 170mA draw is relatively high, impacting power budget significantly.
- • Limited headroom; pushing channels can introduce noticeable noise floor.
- • Mono effect return lacks a dedicated level control.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
5/10
Art. 553536
$487
Befaco Hexmix
by
Befaco
System Utility
Audio Combining
CV Processing
Key Feature:
The Hexmix is a fantastic performance mixer for Eurorack, offering a surprising amount of EQ control per channel. It's ideal for sound designers, experimental musicians, or anyone wanting a really clean and flexible way to manage multiple synth voices – just be aware of its HP cost.
PROS
- • Excellent EQ flexibility per channel provides tonal shaping
- • Solid build quality with robust knobs and sturdy panel
- • Master EQ adds further refinement and polish to the mix
- • Hexpander/VCA expandability offers future modular growth
CONS
- • HP footprint is significant, impacting modular density
- • Price point positions it as a premium investment
- • Limited routing options compared to more complex mixers
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
6/10
Art. 466973
$475
ADDAC 814 6x6 Stereo Matrix Mixer
by
ADDAC
System Utility
Modulation Shaping
Signal Mixing
Key Feature:
The ADDAC 814 is a serious routing powerhouse for modular enthusiasts. It’s not a simple mixer; it’s a matrix, offering incredible signal flow possibilities, but be prepared to invest time learning its intricacies. Perfect for experimental sound designers and those building complex, multi-signal chains.
PROS
- • Excellent routing flexibility for complex modular setups.
- • Robust construction; feels solid despite its size.
- • Switchable Eurorack/line level offers great adaptability.
- • Expandability allows for significant future growth.
CONS
- • The physical size (25+8 TE) demands considerable space.
- • Learning curve is steep; matrix mixers aren't inherently intuitive.
- • Limited gain control; primarily a routing and mixing tool.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
6/10
Art. 604376
$463
Tobinski Interpolating Scanner
by
Tobinski
CV Processing
System Utility
Level Control
Key Feature:
Tobinski's Interpolating Scanner is a seriously creative tool for sound design and sequencing. It's fantastic for experimental musicians and those wanting to add movement and evolving textures to their patches – the interpolation is silky smooth, a real step up from simpler scanners. The flexible routing is a huge plus, allowing for complex signal manipulation.
PROS
- • Exceptional interpolation smoothness, avoids harsh stepping.
- • Robust build quality with sturdy faders and knobs.
- • Flexible routing options with multiple outputs.
- • Scanner's stage and width controls offer unique textures.
CONS
- • 18HP footprint can be restrictive in smaller racks.
- • Price point may be a barrier for budget-conscious users.
- • Limited input gain range on individual channels.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
6/10
Art. 621023
$452
u-he CEN2RION
by
u-he
Signal Mixing
CV Processing
Audio Combining
Key Feature:
This unit is great for stacking two distinct sound layers without fighting for control. You can choose between a smooth or discrete character for each layer, which helps shape how signals blend together. It fits easily into a rack at just 32 mm deep, but the wide 14 HP footprint takes up significant space. Best for builders who want flexible CV mixing without extra gear.
PROS
- • Two independent scanning mixers for layered sound design
- • Smooth or discrete character selectable for every layer
- • Built-in attenuators handle the full CV voltage range
- • Aux sockets offer flexible routing options per layer
CONS
- • 14 HP width is large for a single module
- • No dedicated MIDI or USB control ports listed
- • Dual power rails required for operation
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
9/10
Value:
6/10
Art. 645177
$452
Hexinverter Électronique Mutant Hot Glue
Audio Combining
Level Control
System Utility
Key Feature:
The Mutant Hot Glue is a fantastic way to add polish and cohesion to your modular setup. It's ideal for anyone wanting to create a more 'console-like' sound – think film scores, ambient textures, or just generally tightening up a complex patch. The build is solid, and the integrated compression is surprisingly useful for subtle dynamics shaping.
PROS
- • Superb analog summing creates a cohesive, warm sonic character.
- • Integrated compressor adds subtle glue and dynamic control.
- • Individual channel effects sends offer flexible routing options.
- • Robust build quality; Hexinverter is known for reliable modules.
CONS
- • 24HP footprint can be restrictive in smaller Eurorack cases.
- • Power draw is moderately high, demanding a capable PSU.
- • Effect send routing lacks advanced features like pre/post EQ.
⭐
4.7/5
AudioFu Score
Specs:
10/10
Detail:
4/10
Value:
6/10
Art. 590461
$387
u-he CVilization
by
u-he
CV Processing
Modulation Shaping
System Utility
Key Feature:
This is a great tool for mapping complex patches without needing a big rack. You can record sequences, transpose signals, and mix audio all in one tiny 10 HP slot. It feels like a Swiss army knife for modular builders who want deep control in a small space. Perfect for tight cases or as a central hub for your system.
PROS
- • Four distinct operating modes for flexible workflow
- • Built-in quantiser and sample hold per output
- • Quad Mucorder records sixteen steps per channel
- • Quadraphonic Panner offers CV control over sound
CONS
- • Depth of 34mm is very shallow for a rack unit
- • No specific audio output type or connector details listed
- • Power draw is high at 130mA for the +5V rail
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
9/10
Value:
6/10
Art. 645180
$381
AJH Synth Muting Mixer & VCA black
by
AJH Synth
System Utility
Signal Mixing
Audio Combining
Key Feature:
This AJH mixer is a well-built, compact solution for smaller modular rigs needing simple channel muting and VCA functionality. The overdrive is a nice touch for adding a bit of warmth. It's ideal for those wanting a clean, reliable mixer without a ton of extra features – perfect for beginners or those with limited space.
PROS
- • Solid build quality; metal chassis feels robust and well-assembled.
- • Illuminated mute buttons offer excellent visual feedback in low-light environments.
- • Flexible VCA with switchable linear/exponential response expands modulation options.
- • Overdrive adds subtle grit; useful for adding character to the master output.
CONS
- • Depth (26mm) might be restrictive in shallow Eurorack cases.
- • Five channels feel limiting for larger, more complex modular systems.
- • The level display is basic; lacks finer resolution for precise gain staging.
⭐
4.7/5
AudioFu Score
Specs:
10/10
Detail:
4/10
Value:
6/10
Art. 590784
$347
Erica Synths Black Output Module V2
by
Erica Synths
Audio Combining
CV Processing
Signal Mixing
Key Feature:
The Black Output Module V2 is a seriously useful addition to any Eurorack. It's a clean, compact way to manage your signals, and the CV-controlled pan is a real game-changer for adding stereo width. This is perfect for anyone needing reliable output mixing and headphone amplification without a ton of space or complexity.
PROS
- • Excellent balanced outputs provide clean, noise-free signal routing.
- • Headphone preamp delivers a surprisingly powerful and clear listening experience.
- • CV-controllable pan adds dynamic stereo movement and creative possibilities.
- • Compact 14HP footprint maximizes space in dense modular systems.
CONS
- • Limited to three inputs, may not suffice for complex setups.
- • Power draw is relatively high, consider your PSU's capacity.
- • Stereo potentiometer feels a bit plasticky compared to other Erica modules.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
6/10
Value:
7/10
Art. 420032
$336
Every mixer, attenuator modules that matches
96 models match this page. The 15 above are covered in detail; the rest are listed here with their published specifications.
| # | Model | Specifications | Price |
|---|---|---|---|
| 16 | Make Noise X-Pan | not published | $336 |
| 17 | Schlappi Engineering Eddy | not published | $336 |
| 18 | Shakmat Modular Griffin's Claws | not published | $336 |
| 19 | Tiptop Audio Model 207t | not published | $289 |
| 20 | ADDAC 713 Stereo Discrete Mixer | not published | $278 |
| 21 | 4ms Listen Four Quarters | not published | $254 |
| 22 | Erica Synths Drum Mixer | not published | $243 |
| 23 | Frap Tools CGM Group | not published | $238 |
| 24 | Intellijel Designs Aux Mix 1U | not published | $238 |
| 25 | Intellijel Designs Xfade 1U | not published | $231 |
| 26 | Modbap Modular Transit | not published | $231 |
| 27 | Vostok Instruments Hive | not published | $231 |
| 28 | Vostok Instruments Asset | not published | $230 |
| 29 | 4ms Listen Four | not published | $226 |
| 30 | Doepfer A-135-5 | not published | $220 |
| 31 | Frap Tools CGM Stereo Channel | not published | $220 |
| 32 | ADDAC 815 Mixology | not published | $215 |
| 33 | Tiptop Audio Model 257t | not published | $195 |
| 34 | Dreadbox Psychosis | not published | $192 |
| 35 | Erica Synths Drum Mixer Lite | not published | $185 |
| 36 | Bastl Instruments Buddy | not published | $180 |
| 37 | Doepfer A-138p | not published | $180 |
| 38 | Joranalogue Audio Design Mix 3 | not published | $180 |
| 39 | Befaco A*B+C V2 | not published | $173 |
| 40 | Doepfer A-138M | not published | $173 |
| 41 | Doepfer A-135-1 | not published | $172 |
| 42 | Shakmat Modular Aeolus Mixer | not published | $172 |
| 43 | Befaco STMix | not published | $171 |
| 44 | Klavis Mixwitch Black | not published | $168 |
| 45 | Frap Tools CGM I (Insert) | not published | $161 |
| 46 | Klavis Mixwitch | not published | $161 |
| 47 | Vostok Instruments Trace | not published | $161 |
| 48 | Doepfer A-135-3 | not published | $159 |
| 49 | NANO Modules ST-MAR | not published | $157 |
| 50 | Vostok Instruments Path | not published | $157 |
| 51 | Acid Rain Technology Junction | not published | $150 |
| 52 | Weston Precision Audio M3S Stereo Mixer | not published | $138 |
| 53 | Intellijel Designs Triplatt | not published | $134 |
| 54 | Frap Tools 333 | not published | $123 |
| 55 | ADDAC 218 Attenuverters | not published | $122 |
| 56 | Acid Rain Technology Navigator | not published | $122 |
| 57 | Doepfer A-138j | not published | $121 |
| 58 | Befaco 1U STMix | not published | $115 |
| 59 | Doepfer A-138-6 1U | not published | $115 |
| 60 | Intellijel Designs Mixup | not published | $114 |
| 61 | Befaco Atte | not published | $110 |
| 62 | Befaco Mixer V2 | not published | $110 |
| 63 | Doepfer A-138i | not published | $110 |
| 64 | Erica Synths Black Mixer V2 | not published | $110 |
| 65 | Tiptop Audio MIX7 | not published | $109 |
| 66 | NANO Modules MAR | not published | $105 |
| 67 | Klavis Tweakers Plus | not published | $103 |
| 68 | Tiptop Audio MIX7 Black | not published | $103 |
| 69 | XAOC Devices Konin | not published | $103 |
| 70 | XAOC Devices Sopot | not published | $103 |
| 71 | Intellijel Designs Unity Mixer | not published | $100 |
| 72 | Intellijel Designs Quadratt 1U | not published | $99 |
| 73 | XAOC Devices Bytom | not published | $99 |
| 74 | Intellijel Designs Duatt 1U | not published | $98 |
| 75 | Klavis Tweakers Black | not published | $95 |
| 76 | Rides In The Storm XXM | not published | $93 |
| 77 | Doepfer A-138s VE Mini Stereo Mixer | not published | $92 |
| 78 | Doepfer A-138s Mini Stereo Mixer | not published | $92 |
| 79 | Intellijel Designs Stereo Mixer 1U | not published | $86 |
| 80 | Erica Synths Black Mixer/Splitter V2 | not published | $85 |
| 81 | Klavis Tweakers | not published | $85 |
| 82 | Doepfer A-183-5 | not published | $80 |
| 83 | Doepfer A-138n VE | not published | $79 |
| 84 | Doepfer A-138a Vintage Edition | not published | $79 |
| 85 | Doepfer A-138a Mixer Linear | not published | $78 |
| 86 | Doepfer A-138o | not published | $72 |
| 87 | Doepfer A-138n | not published | $69 |
| 88 | Doepfer A-138b | not published | $69 |
| 89 | Erica Synths Pico Mixer | not published | $69 |
| 90 | Doepfer A-183-3 | not published | $67 |
| 91 | Behringer 305 EQ/Mixer/Output | not published | $65 |
| 92 | Rides In The Storm MUL | not published | $64 |
| 93 | Rides In The Storm NGM | not published | $62 |
| 94 | Doepfer A-183-2 Offset Generator | not published | $59 |
| 95 | Behringer CP3A-M Mixer | not published | $34 |
| 96 | Intellijel Designs Att 1U | not published | $29 |
Mixer, Attenuator Modules by the numbers
Measured across all 96 models in this category, so «wide», «short» or «expensive» mean something you can check.
Price
median $157
from $64 to $487
How to Choose the Best Mixer, Attenuator Modules
1
Gain Staging & Headroom
This isn't just about volume. A good mixer module provides clean gain, letting you push signals without nasty digital distortion or excessive noise. Cheap modules often introduce hiss or compress the signal prematurely - a real killer for subtle textures.
2
Attenuation Range & Accuracy
How precisely can you dial back a signal? Some attenuators have coarse steps that make fine-tuning impossible. Look for a wide range (ideally 0-100%) and a smooth, predictable taper - especially important for modulation.
3
Noise Floor
Modular synths are inherently noisy, but a bad mixer module can amplify that. Listen carefully for hiss or hum, especially when attenuating signals significantly. It's a dealbreaker for quiet, ambient patches.
4
Routing Flexibility
Do you need pre/post fader options? Multiple inputs? Aux sends? Think about how you'll integrate the mixer into your patch - a basic stereo bus isn't always enough.
5
EQ & Filtering
Some mixer modules offer basic EQ or filtering - a huge bonus for shaping your overall sound or cleaning up muddiness. It's not a substitute for dedicated filters, but it can be a surprisingly useful tool for subtle tonal adjustments.
Buying Guide
Don't skimp on the mixer - it's the foundation. Entry-level modules can be tempting, but the noise and limited functionality will quickly frustrate you. Paying a bit more for a module with good headroom, accurate attenuation, and flexible routing is an investment in your sanity. Watch out for modules that claim 'infinite' routing options - those often translate to a convoluted patching system that's more hassle than it's worth.
How This List Is Built
We don't play these instruments — we're a catalog, not a review desk, and we'd rather say so than pretend otherwise. This page covers 96 mixer, attenuator modules from the Thomann catalogue, which is the largest single source of specification data in this category: 15 in detail, the rest listed with their specifications.
Position is computed, not curated. We parse the manufacturer's own description into actual values — nut width, scale, fret count, fingerboard radius, size, alloy — and rank on them: how many specifications a model has published, how many of them are measurable numbers, and how precisely it meets this page's criterion. A product image adds a little. Price is not a ranking signal: it tells you nothing about whether a neck fits your hand. The same inputs always produce the same order, so nothing here is shuffled to look fresh.
What this list is good for: narrowing a category down to a shortlist by spec and budget. What it isn't: a substitute for hearing an instrument. Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
Frequently Asked Questions
An attenuator simply reduces a signal's level. A mixer combines multiple signals and provides individual level controls for each. Most mixers include attenuators, but not all attenuators are part of a mixer.
Technically, yes, but it's a pain. Managing multiple individual attenuators becomes unwieldy quickly, especially when you're trying to create complex evolving textures. A mixer module streamlines the process and gives you a centralized control point.
Pre-fader signals are tapped before the fader, so they're unaffected by the fader's position. Post-fader signals are affected by the fader. Pre-fader is great for modulation sources; post-fader is for the main output level.
First, check your power supply. A noisy power supply is the most common culprit. Then, re-examine your patch - a poorly shielded cable or a faulty module can also introduce noise. Finally, try attenuating signals less aggressively - extreme attenuation often amplifies noise.
Absolutely! Many modular users dedicate a mixer channel to sending signals to effects units. It allows for precise control over the send level and can be easily modulated for dynamic effects.
