AudioFuAudioFu Chart · October 2026
Best Expander Modules for Professional 2026
The top pick is Squarp Instruments xp32 ($648). Xaoc Devices Hrad Mixing Console Expansion gives you the most for the money at $279. Ranked by the AudioFu Index from 68 models across 22 brands, prices checked every night.
Last updated: October 15, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
-
The xp32 is a serious expansion for Hermod+ users wanting intricate, multi-layered sequencing. It's a fantastic solution for those who need granular control over multiple signals, perfect for experimental electronic musicians or anyone building complex, generative soundscapes. It’s a well-executed piece of hardware that really elevates the Hermod+’s capabilities.
Pros
- Exceptional 16-bit AD conversion delivers clean, precise signal routing.
- 32 outputs significantly expand Hermod+ sequencing possibilities.
- Compact 14HP footprint maximizes Eurorack space efficiency.
Cons
- Requires Hermod+; not a standalone module, limiting its appeal.
- Power draw, while manageable, can be a consideration in dense racks.
41AudioFu
IndexStableno change since Aug 14Aug 14$648 now$648€579 at Thomann · in stockCheck price ↗ -
Der Mann mit der Maschine M4 Motor Fader Unit
Not on Reverb yet1 finish at Thomann
The M4 is a seriously cool addition if you're already in the Droid Master ecosystem. It lets you build some genuinely unique performance workflows with those motorized faders and programmable haptic feedback—perfect for experimental musicians and those who want to get really granular with their sequencing and modulation.
Pros
- Motorized faders offer precise, repeatable control for complex sequences
- Programmable haptic feedback adds unique expressive possibilities for performance
- 60mm faders provide good visual feedback and a substantial feel
Cons
- Requires the Droid Master module, increasing the overall investment
- 350mA current draw can be significant, demanding a robust power supply
57AudioFu
Index↓ 19.0%since Aug 14 · lowest so far$536 · Aug 14$434 now$434€388 at Thomann · in stockCheck price ↗ -
Befaco Hexpander Eurorack Synthesizer Module
Hexpander · Befaco
8 for sale on Reverb1 finish at Thomann
The Hexpander is a really smart addition if you already own a Hexmix. It unlocks a whole new level of routing and monitoring control, making it ideal for live performers or anyone needing more complex effects management within their modular setup. It’s a focused expander, not a replacement for a full mixer.
Pros
- Expands Hexmix’s routing significantly, adding crucial flexibility.
- Aux sends offer pre/post fader control for nuanced effects.
- Dedicated headphone output simplifies monitoring during performance.
Cons
- Adds considerable HP cost for relatively limited functionality on its own.
- Reliance on the Hexmix means it’s not a standalone solution.
71AudioFu
Index↓ 1.2%since Aug 14 · lowest so far$373 · Aug 14$368 now$368€329 at Thomann · in stockCheck price ↗ -
The Tete is a brilliant extension of the Tetrapad, instantly transforming it into a powerful performance hub. It’s perfect for experimental musicians and live performers who want a unique blend of sequencing, looping, and real-time control within a modular environment—a real game-changer for expanding your live setup.
Pros
- Remarkable Tetrapad expander, unlocks creative performance possibilities
- Flexible combo mode handles faders, LFOs, and drum triggering
- Step sequencing offers precise control and recall of sequences
Cons
- Requires the Tetrapad, increasing overall system investment
- Limited physical controls beyond the Tetrapad pads themselves
50AudioFu
Index↓ 2.8%since Aug 14 · lowest so far$356 · Aug 14$346 now$346€309 at Thomann · in stockCheck price ↗ -
Xaoc Devices Hrad Mixing Console Expansion
Hrad · XAOC Devices
4 for sale on Reverb1 finish at Thomann
The Hrad is a focused, essential expander for anyone already invested in the XAOC Praga ecosystem. It streamlines your aux routing and cueing, making complex patching more manageable and performance-ready. If you're building a Praga-centric modular system, this is a smart, efficient addition.
Pros
- Solid build quality; feels robust and well-engineered
- Provides crucial expandability for Praga mixer workflow
- Cue output is thoughtfully implemented for performance use
Cons
- Requires Praga module, adding to overall system cost
- Limited routing flexibility compared to more complex expanders
68AudioFu
Index↓ 3.9%since Aug 14 · lowest so far$290 · Aug 14$279 now$279€249 at Thomann · in stockCheck price ↗ -
Der Mann mit der Maschine B32 Controller
Not on Reverb yet1 finish at Thomann
This B32 controller is a serious upgrade for Droid Master users. It’s a well-built, thoughtfully designed module that brings a ton of hands-on control to your modular patching – especially useful for those who want to sequence complex patterns or rapidly switch between presets. Perfect for experienced modular enthusiasts looking to streamline their workflow.
Pros
- Excellent button feel with satisfying tactile feedback.
- Robust build quality; feels solid within a Eurorack case.
- Intuitive integration with the Droid Master significantly expands workflow.
Cons
- Requires the Droid Master, limiting standalone functionality.
- 10HP footprint can be restrictive in smaller Eurorack setups.
48AudioFu
IndexStableno change since Aug 14Aug 14$300 now$300€268 at Thomann · in stockCheck price ↗ -
The Bohumin is a really clever little module if you're already invested in the Ostrawa ecosystem. It's like giving your Ostrawa a serious upgrade, adding a second stereo aux send and a ton of modulation possibilities for creating evolving soundscapes and dynamic textures—perfect for experimental electronic musicians and sound designers who crave nuanced control.
Pros
- Expands Ostrawa’s routing significantly, unlocking complex stereo effects.
- Provides precise level control over aux returns, crucial for mix shaping.
- CV and gate inputs offer dynamic, performance-driven aux sends and mutes.
Cons
- Requires Ostrawa, limiting its standalone utility and increasing overall cost.
- Aux send B CV input lacks attenuation, potentially overwhelming the return.
52AudioFu
Index↓ 3.9%since Aug 14 · lowest so far$290 · Aug 14$279 now$279€249 at Thomann · in stockCheck price ↗ -
The Rostock is a seriously cool module if you're diving into intricate sequencing and sound design. It's a core piece of XAOC's Leibniz system, offering unique bit-level manipulation. Perfect for experimental musicians and sound designers looking to generate complex, evolving patterns and textures.
Pros
- Exceptional bit-level manipulation for complex rhythmic textures.
- Leibniz system integration unlocks truly unique sequencing possibilities.
- Scramble function creates unpredictable, chaotic melodic variations.
Cons
- Relatively high power draw compared to simpler utility modules.
- Steep learning curve; requires understanding of binary data concepts.
51AudioFu
Index↓ 3.5%since Aug 14 · lowest so far$289 · Aug 14$279 now$279€249 at Thomann · in stockCheck price ↗ -
The Jena is a seriously powerful little module. It's like having a mini-wavetable workstation in your rack, perfect for sound designers and experimental musicians who want to create evolving textures and complex rhythms. Just be prepared to dive deep – it's not the easiest module to pick up, but the payoff is huge.
Pros
- Exceptional wavetable sculpting capabilities for unique textures
- Seamless integration with XAOC’s Leibniz ecosystem unlocks complex modulation
- Compact 8HP footprint maximizes patch flexibility in tight racks
Cons
- Steep learning curve for those unfamiliar with wavetable synthesis
- Power draw requires careful consideration in power-constrained systems
50AudioFu
IndexStableno change since Aug 14Aug 14$279 now$279€249 at Thomann · in stockCheck price ↗ -
This X7 expander is a clever little addition for Droid Master users. It's a straightforward solution for bringing in external MIDI devices and triggering gates, and the USB-C is a nice touch for modern workflows. Ideal for those wanting to integrate their Droid Master into a larger, MIDI-driven modular setup without complex routing.
Pros
- Excellent MIDI integration expands Droid Master's capabilities significantly.
- Compact 4U width optimizes precious Eurorack space.
- Reliable 3.5mm TRS MIDI ports offer robust connections.
Cons
- Solely dependent on the Droid Master – limited standalone use.
- Power draw, while manageable, could impact larger systems.
All 68 expander modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Expert Sleepers ESX-8CV MK2 CV Expander Eurorack Synth ModuleESX-8CV mk2 · Expert Sleepers76Stable$212€189$212€189Check ↗
- 12
Doepfer A-154 Sequencer ControllerA-154 Vintage Edition · Doepfer · 2 finishes73↓ 4.8%$223€199$223€199Check ↗
- 13
Expert Sleepers FHX-8CV CV Expander Eurorack Synth ModuleFHX-8CV · Expert Sleepers · 2 finishes72Stable$162€145$162€145Check ↗
- 14
4MS QCD ExpanderModule Wi-Fi Expander · 4ms78Stable$111€99$111€99Check ↗
- 15
XAOC Devices Lipsk IIXAOC Devices51↓ 1.9%$174€155$174€155Check ↗
- 16
XAOC Devices DevaXAOC Devices51↓ 2.2%$196€175$196€175Check ↗
- 17
Intellijel Designs CVx 1UIntellijel Designs51↓ 5.4%$196€175$196€175Check ↗
- 18
XAOC Devices GeraXAOC Devices50Stable$174€155$174€155Check ↗
- 19
XAOC Devices Ostankino IIXAOC Devices50Stable$188€168$188€168Check ↗
- 20
Der Mann mit der Maschine S10 ControllerDer Mann mit der Maschine49↓ 0.7%$154€138$154€138Check ↗
- 21
Der Mann mit der Maschine G8 ExpanderDer Mann mit der Maschine48Stable$166€148$166€148Check ↗
- 22
Der Mann mit der Maschine E4 ControllerDer Mann mit der Maschine48Stable$188€168$188€168Check ↗
- 23
Der Mann mit der Maschine DB8E Display/ControllerDer Mann mit der Maschine48Stable$199€178$199€178Check ↗
- 24
Der Mann mit der Maschine P4B2 ControllerDer Mann mit der Maschine49↓ 0.8%$140€125$140€125Check ↗
- 25
Expert Sleepers ES-5 mk4Expert Sleepers46Stable$156€139$156€139Check ↗
- 26
XAOC Devices AradXAOC Devices50Stable$133€119$133€119Check ↗
- 27
Ohmforce Bohm GrooveOhmforce43Stable$156€139$156€139Check ↗
- 28
Vermona Mono Lancet Modular DockVermona43↓ 3.4%$189€169$189€169Check ↗
- 29
vpme.de QEXvpme.de43Stable$146€130$146€130Check ↗
- 30
Shakmat Modular Ballista Blast ExpanderShakmat Modular43Stable$144€129$144€129Check ↗
- 31
Xaoc Devices Nin Zadar ExpanderNIN · XAOC Devices72Stable$73€65$73€65Check ↗
- 32
Vermona Modular MEX3Vermona Modular41Stable$200€179$200€179Check ↗
- 33
4ms MetaButtons4ms41↑ 8.4%$144€129$144€129Check ↗
- 34
4ms MetaAIO4ms39↑ 11.2%$223€199$223€199Check ↗
- 35
Der Mann mit der Maschine P2B8 ControllerDer Mann mit der Maschine48Stable$121€108$121€108Check ↗
- 36
ADDAC 501B Complex Random ExpansionADDAC37↑ 10.4%$167€149$167€149Check ↗
- 37
Der Mann mit der Maschine P10 ControllerDer Mann mit der Maschine51↓ 3.9%$111€99$111€99Check ↗
- 38
Erica Synths Graphic Resonant FB ExpanderErica Synths43Stable$129€115$129€115Check ↗
- 39
Neuzeit Instruments WarpEXNeuzeit Instruments41Stable$133€119$133€119Check ↗
- 40
OXI Instruments Pipe MKIIOXI Instruments43Stable$123€110$123€110Check ↗
- 41
AtoV PunkBusAtoV41Stable$123€110$123€110Check ↗
- 42
Erica Synths Black Filter CouplerBlack VCF Coupler · Erica Synths46↑ 32.0%$111€99$111€99Check ↗
- 43
XAOC Devices Poti IIXAOC Devices50Stable$100€89$100€89Check ↗
- 44
ADDAC 506B Stochastic Function Exp.ADDAC38↑ 9.5%$129€115$129€115Check ↗
- 45
XAOC Devices HelXAOC Devices50Stable$95€85$95€85Check ↗
- 46
Ohmforce Bohm PerformerOhmforce43Stable$111€99$111€99Check ↗
- 47
Shakmat Modular Bard Quartet ExpandShakmat Modular43Stable$111€99$111€99Check ↗
- 48
Befaco MEX Eurorack Synthesizer ModuleMEX · Befaco49Stable$95€85$95€85Check ↗
- 49
Intellijel Designs Atlx 1UIntellijel Designs · 2 finishes57Stable$73€65$73€65Check ↗
- 50
Intellijel Designs QxIntellijel Designs48Stable$87€78$87€78Check ↗
- 51
Intellijel Designs GxIntellijel Designs48Stable$87€78$87€78Check ↗
- 52
Schlappi Engineering Cascade BlackSchlappi Engineering · 2 finishes51Stable$73€65$73€65Check ↗
- 53
NANO Modules EXP4NANO Modules43↓ 3.5%$92€82$92€82Check ↗
- 54
XAOC Devices UstkaXAOC Devices50Stable$73€65$73€65Check ↗
- 55
4ms Listen Up4ms46↓ 1.5%$73€65$73€65Check ↗
- 56
OXI Instruments Split 2HPOXI Instruments43Stable$76€68$76€68Check ↗
- 57
Doepfer A-161 Clock SequencerA-161 · Doepfer71Stable$71€63$71€63Check ↗
- 58
Expert Sleepers TMB Tiny MIDI Breakout Eurorack Synth ModuleTiny MIDI Breakout · Expert Sleepers66Stable$55€49$55€49Check ↗
- 59
Expert Sleepers TMB Tiny MIDI Breakout Eurorack Synth ModuleMIDI breakout · Expert Sleepers66Stable$60€54$60€54Check ↗
- 60
Malekko DIN SYNCMalekko50↓ 40.8%$32€29$32€29Check ↗
- 61
Intellijel Designs XY IO 1UIntellijel Designs48Stable$24€21$24€21Check ↗
- 62
Intellijel Designs Stereo Line In Jacks 1UIntellijel Designs48Stable$24€21$24€21Check ↗
- 63
Intellijel Designs Stereo Out Jacks 1UIntellijel Designs48Stable$27€24$27€24Check ↗
- 64
Intellijel Designs USB Extender 1U/3UIntellijel Designs48Stable$49€44$49€44Check ↗
- 65
Doepfer A-126-2 ExpanderDoepfer46Stable$54€48$54€48Check ↗
- 66
Doepfer A-149-2Doepfer46Stable$66€59$66€59Check ↗
- 67
vpme.de SixSwitchesvpme.de43Stable$50€45$50€45Check ↗
- 68
Robaux MIDI Expander 2HPRobaux41Stable$17€15$17€15Check ↗
Expander Modules by the numbers
Measured across all 72 models we track, not a sample.
Median $129 — half of all expander modules here cost less.
How to choose the best expander modules
Voice Allocation & Stability
This isn't just about how many voices you get. It's about whether those voices remain stable and consistent under heavy modulation, especially when running complex FM or wavetable setups. A module that collapses under pressure is worthless.
Modulation Matrix Depth
Professional patches often involve intricate modulation routing. A shallow matrix means you'll be patching a spaghetti mess just to get a decent sound. Look for modules with flexible routing and multiple modulation destinations.
Signal Path Clarity & Headroom
Cheap expanders often muddy the signal, especially when layering multiple voices. We're looking for clean, articulate output - the ability to hear the nuances of each oscillator without a pile of unwanted noise or compression.
Workflow & User Interface
Patching is already a time sink. An expander with a clunky interface or unintuitive controls will only slow you down. Consider the module's layout, labeling, and overall ergonomics. Can you quickly dial in a sound under pressure?
Polyphonic Tracking Accuracy
Polyphonic synths live or die by their tracking. Even slight detuning discrepancies between voices become glaringly obvious in live performance or complex recordings. We evaluate tracking stability across the entire keyboard range.
Buying guide
Okay, so you're diving deep into modular and realizing you need more voices than your initial oscillator setup can handle. Expander modules are the key, but not all expanders are created equal. We're talking about modules that actually hold up to the demands of a gigging musician, not just a bedroom tinkerer - modules that offer serious headroom, nuanced modulation, and a workflow that doesn't drive you insane when you're trying to nail a complex patch under pressure.
Don't fall for the 'more voices = better' trap. A poorly designed expander with 16 voices will sound worse than a well-engineered one with 8. Pay attention to the signal path-cheaper modules often cut corners on component quality, leading to a compressed, lifeless sound.
It's worth investing in a module with a robust build and a clear signal chain; you'll hear the difference, and it'll last longer on the road.
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 72 expander 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
How many voices do I really need?
It depends on your music, but 8-12 voices is a sweet spot for most professional applications. More than that and you're likely chasing diminishing returns unless you're doing massive, layered textures.
What's the difference between an expander and a multi?
Expanders typically focus on increasing the number of voices within a single oscillator type or synthesis architecture. Multis are more like standalone instruments with multiple engines, often offering broader sonic versatility but potentially less integration with a modular system.
Can I use an expander with any oscillator module?
Generally, yes, but compatibility is key. Ensure the expander supports the oscillator's control voltage range and gate signals. Check the manufacturer's documentation for specific requirements.
What about latency? Does an expander introduce noticeable delay?
Latency can be an issue, especially with complex routing. High-quality expanders minimize latency, but it's something to be aware of, particularly when playing fast passages or using external effects.
Are there any expanders that offer a good balance of features and price?
Mutable Instruments Shaman is a strong contender, offering 12 voices with a flexible modulation matrix, but it's not cheap. Intellijel Stereo Quad is another option, though the workflow can be a bit less intuitive.
