AudioFu Chart · November 2026
Best Expander Modules Under $500 2026
The top pick is 4MS QCD Expander ($111). Intellijel Designs XY IO 1U gives you the most for the money at $23. Befaco Hexpander Eurorack Synthesizer Module leads the high end. Ranked by the AudioFu Index from 67 models across 21 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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You get this module if you already own a 4ms Meta Module and want to move patches and presets to and from your computer without cables. It is a small 4 HP unit that fits a Eurorack case, and it runs on a 12 V supply with a modest current draw. It makes the most sense for Meta Module owners who want easier file sharing.
Pros
- Connects to a computer over Wi-Fi for easy exchange of patches and presets
- Uses 2.4 GHz 802.11 b/g/n Wi-Fi, so setup needs no cables
- Extends the 4ms Meta Module, adding wireless patch management
Cons
- Works only with the 4ms Meta Module, so it has no use with other gear
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Expert Sleepers ESX-8CV MK2 CV Expander Eurorack Synth Module
ESX-8CV mk2 · Expert Sleepers
8 for sale on Reverb1 finish at Thomann
If you already use an ES-4, ES-40 or ES-5 and want more control voltage outputs, this module is built for that job. It gives you eight CV outputs on 3.5 mm mini jacks, and a jumper lets you choose between calibrated and uncalibrated voltage ranges. It is a small 4 HP module that draws little power, so it can fit into a Eurorack setup.
Pros
- Adds eight CV outputs through 3.5 mm mini jacks
- DC coupled outputs for direct control voltage use
- Jumper lets you pick calibrated ±5.33V or uncalibrated ±9.5V output
Cons
- Works only as an extension for the ES-4, ES-40 or ES-5 module
- Needs ±12 V power from your Eurorack case
75AudioFu
IndexStableno change since Aug 17Aug 17$211 now$211€189 at Thomann · in stockCheck price ↗ -
The NIN is an extension module for the Zadar by XAOC, so you only need it if you already own a Zadar or plan to buy one. It adds manual trigger buttons and an extra assignable CV input for channels A-D, which gives you more hands-on control. At 3 HP, it fits into a small Eurorack case without taking up much room.
Pros
- Adds manual trigger buttons for channels A-D on the Zadar
- Gives channels A-D an additional assignable CV input
- Only 3 HP wide, so it saves space in a Eurorack case
Cons
- Needs the Zadar by XAOC (Article Nr #447263#), which is not included
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Befaco Hexpander Eurorack Synthesizer Module
Hexpander · Befaco
9 for sale on Reverb1 finish at Thomann
You will want this if you already run a Hexmix and need more routing. It adds effects sends, effects returns, a headphone output, and a stereo master output, so you can build a bigger mix on the same panel. It is a Eurorack module, so you will need a rack and a power supply that can handle its current draw.
Pros
- Adds three AUX sends to each Hexmix channel, selectable pre or post fader
- Includes three stereo effects returns for bringing effects back into your mix
- Has a stereo headphone output with a volume control for monitoring
Cons
- Needs a 12 V supply on both rails, drawing 90 mA on +12 V and 85 mA on -12 V
74AudioFu
IndexStableno change since Aug 17Aug 17$368 now$368€329 at Thomann · in stockCheck price ↗ -
Expert Sleepers FHX-8CV CV Expander Eurorack Synth Module
FHX-8GT · Expert Sleepers
4 for sale on Reverb2 finishes at Thomann
If you already own an FH-2 and want more outputs for triggers, clocks and gates, this module is for you. Each one adds eight programmable outputs, and up to four can connect to a single FH-2. It is narrow and draws little power, so it can fit into many Eurorack setups.
Pros
- Adds eight programmable clock, trigger and gate outputs to the FH-2
- Up to four FHX-8GT modules can connect to one FH-2
- Compact 4 TE Eurorack width fits easily in a small case
Cons
- Needs an FH-2 module to work, which is not included with this product
73AudioFu
IndexStableno change since Aug 17Aug 17$116 now$116€104 at Thomann · in stockCheck price ↗ -
If you already own an A-160 clock divider, this module lets you add an 8-step sequencer to your Eurorack setup. It gives you eight outputs that switch along with the divider's rhythm, and it takes up only 4 HP of rack space. Just remember it has to sit directly to the right of the A-160 to work.
Pros
- Eight outputs switch in time with the A-160 clock divider rhythm
- Designed as an extension module for the A-160 clock divider
- Compact Eurorack format at 4 HP width
Cons
- Must be installed directly to the right of the A-160 clock divider
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The Doepfer A-154 is a sequencer controller for the A-155 module in Eurorack format. You get 8 or 16 steps, several operating modes, and an LED display, and it can control up to two A-155 modules. It suits you if you want to build repeating patterns in a Eurorack setup, but keep in mind that 16 steps need two A-155 modules.
Pros
- Sequencer with 8 or 16 steps for building repeating patterns
- Various operating modes give you different ways to run the sequence
- LED display shows the current state at a glance
Cons
- 16 steps need two A-155 modules, so you need extra hardware for the full range
72AudioFu
IndexStableno change since Aug 17Aug 17$218 now$218€195 at Thomann · in stockCheck price ↗ -
If you already run Intellijel gear, this small module can be a handy add-on. It takes up 4 HP and gives you two 3.5 mm TRS jacks you can use as an insert, a send/return, or a stereo output. It suits you if you want more routing options in a compatible Intellijel case without using much space.
Pros
- Adds a 4 HP module that expands Intellijel Mixup and Pedal I/O 1U setups
- Works with 62 Palette cases and 7U cases with V2 audio jacks board
- Two 3.5 mm TRS jacks give you flexible patching options
Cons
- Only two jacks, so it does not offer many connections for large setups
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Expert Sleepers TMB Tiny MIDI Breakout Eurorack Synth Module
Tiny MIDI Breakout · Expert Sleepers
5 for sale on Reverb1 finish at Thomann
If you already use a Disting MK4, Super Disting EX Plus Alpha, ES-9, General CV or FH-2 in your Eurorack rack, this small module gives you six 3.5 mm TRS jacks for MIDI. It supports both type A and type B MIDI assignment, so you can match the wiring your setup needs. It suits you if you want a tiny, passive adapter to add MIDI to a compatible module.
Pros
- Converts TRS 3.5 mm jacks to MIDI for Disting MK4 and Super Disting EX Plus Alpha
- Offers six 3.5 mm TRS jack sockets for flexible connections
- Supports both MIDI assignment type A and type B
Cons
- Needs a compatible Disting MK4, Super Disting EX Plus Alpha, ES-9, General CV or FH-2 to work
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Expert Sleepers TMB Tiny MIDI Breakout Eurorack Synth Module
MIDI breakout · Expert Sleepers
5 for sale on Reverb1 finish at Thomann
This is a small Eurorack module with one MIDI input and one MIDI output. It connects to compatible modules like the Disting mk4, General CV and FH-2 through their breakout header. If you already use one of those modules and want MIDI in your rack, this is a simple, compact way to add it.
Pros
- Has one MIDI input and one MIDI output for compatible modules
- Connects through a breakout header on compatible modules
- Works with the Disting mk4, General CV and FH-2
Cons
- Only one MIDI input and one MIDI output, so no extra MIDI ports
All 67 expander modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Xaoc Devices Hrad Mixing Console ExpansionHrad · XAOC Devices67Stable$278€249$278€249Check ↗
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Intellijel Designs AtlxIntellijel Designs · 2 finishes57Stable$73€65$73€65Check ↗
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Erica Synths Black Filter CouplerBlack VCF Coupler · Erica Synths56Stable$111€99$111€99Check ↗
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Schlappi Engineering CascadeSchlappi Engineering · 2 finishes51Stable$73€65$73€65Check ↗
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Der Mann mit der Maschine P10 ControllerDer Mann mit der Maschine51↓ 3.9%$111€99$111€99Check ↗
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XAOC Devices HelXAOC Devices50Stable$95€85$95€85Check ↗
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Befaco MEX Eurorack Synthesizer ModuleMEX · Befaco50Stable$95€85$95€85Check ↗
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XAOC Devices Poti IIXAOC Devices50Stable$99€89$99€89Check ↗
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XAOC Devices AradXAOC Devices50Stable$133€119$133€119Check ↗
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XAOC Devices GeraXAOC Devices50Stable$173€155$173€155Check ↗
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XAOC Devices Lipsk IIXAOC Devices50Stable$173€155$173€155Check ↗
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XAOC Devices Ostankino IIXAOC Devices50Stable$188€168$188€168Check ↗
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XAOC Devices DevaXAOC Devices50Stable$196€175$196€175Check ↗
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XAOC Devices JenaXAOC Devices50Stable$278€249$278€249Check ↗
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XAOC Devices BohuminXAOC Devices50Stable$278€249$278€249Check ↗
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XAOC Devices RostockXAOC Devices50Stable$278€249$278€249Check ↗
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Intellijel Designs TeteIntellijel Designs50↓ 2.8%$345€309$345€309Check ↗
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XAOC Devices UstkaXAOC Devices49↑ 1.6%$73€65$73€65Check ↗
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Der Mann mit der Maschine S10 ControllerDer Mann mit der Maschine49↓ 0.7%$154€138$154€138Check ↗
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Intellijel Designs Stereo Line In Jacks 1UIntellijel Designs48Stable$23€21$23€21Check ↗
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Intellijel Designs Stereo Out Jacks 1UIntellijel Designs48Stable$27€24$27€24Check ↗
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Intellijel Designs USB Extender 1U/3UIntellijel Designs48Stable$49€44$49€44Check ↗
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Intellijel Designs GxIntellijel Designs48Stable$87€78$87€78Check ↗
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Intellijel Designs QxIntellijel Designs48Stable$87€78$87€78Check ↗
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Der Mann mit der Maschine P2B8 ControllerDer Mann mit der Maschine48Stable$121€108$121€108Check ↗
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Der Mann mit der Maschine P4B2 ControllerDer Mann mit der Maschine48Stable$140€125$140€125Check ↗
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Der Mann mit der Maschine G8 ExpanderDer Mann mit der Maschine48Stable$165€148$165€148Check ↗
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Der Mann mit der Maschine E4 ControllerDer Mann mit der Maschine48Stable$188€168$188€168Check ↗
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Intellijel Designs CVx 1UIntellijel Designs48Stable$196€175$196€175Check ↗
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Der Mann mit der Maschine DB8E Display/ControllerDer Mann mit der Maschine48Stable$199€178$199€178Check ↗
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Der Mann mit der Maschine X7 ExpanderDer Mann mit der Maschine48Stable$252€225$252€225Check ↗
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Der Mann mit der Maschine B32 ControllerDer Mann mit der Maschine48Stable$300€268$300€268Check ↗
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Der Mann mit der Maschine M4 Motor Fader UnitDer Mann mit der Maschine48Stable$434€388$434€388Check ↗
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Doepfer A-126-2 ExpanderDoepfer46Stable$54€48$54€48Check ↗
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Doepfer A-149-2Doepfer46Stable$66€59$66€59Check ↗
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Expert Sleepers ES-5 mk4Expert Sleepers46Stable$155€139$155€139Check ↗
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4ms Listen Up4ms45Stable$73€65$73€65Check ↗
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vpme.de SixSwitchesvpme.de43Stable$50€45$50€45Check ↗
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OXI Instruments Split 2HPOXI Instruments43Stable$76€68$76€68Check ↗
- 50
Shakmat Modular Bard Quartet ExpandShakmat Modular43Stable$111€99$111€99Check ↗
Expander Modules by the numbers
Measured across all 71 models we track, not a sample.
Median $129 — half of all expander modules here cost less.
How to choose the best expander modules
Voice Count
This is the obvious one. A 2-voice expander is different from an 8-voice, and the impact on your patching options is huge. Consider your existing modules and how many voices you realistically need.
Oscillator Quality
Don't expect Moog-level richness, but look for oscillators that offer decent waveform variety (saw, square, triangle, pulse) and some degree of PWM or sync. That thin, brittle sound isn't going to cut it for pads or basses.
Filter Character
A decent filter is the glue that holds everything together. Look for something with a usable resonance and a distinct character - a bit of warmth, a touch of grit, something beyond a basic lowpass. That 'fat midrange honk' is a plus.
Modulation Options
Basic LFOs and envelope generators are essential. The more modulation destinations you have, the more interesting your sounds can be. Limited modulation can feel restrictive quickly.
Build Quality & Reliability
Let's be honest, at this price point, compromises are made. But flimsy pots, loose jacks, and questionable power delivery are a recipe for frustration. Check reviews and forums for reliability reports.
Buying guide
So, you're diving into modular synths and realizing you need more voices than your core module can handle? Expander modules are the answer, but blowing your budget on a fancy, boutique solution isn't always necessary. Let's get you expanding without emptying your bank account.
At this price, you're trading off something. It's almost always going to be oscillator complexity or filter character. Don't expect pristine, studio-grade audio - these are workhorse modules for gigging and sketching out ideas.
Pay attention to power consumption; expanders can draw a surprising amount of current, and you don't want to overload your PSU. And seriously, read the manual before you buy - some of these modules have quirks.
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 71 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
Can I really get a good-sounding expander for under $500?
Absolutely. You won't get the absolute best of the best, but there are plenty of modules that offer excellent value and surprisingly good sound. Just manage your expectations and do your research.
What's the deal with power consumption?
It's critical. Check the module's power requirements (in mA) and make sure your power supply can handle it without sagging or tripping. A sagging PSU leads to flaky behavior and weird sounds.
Are these modules suitable for live performance?
Many are, but consider the number of knobs and the complexity of the patching. Simpler, more straightforward designs are easier to control on stage.
What's the difference between an expander and a voice module?
An expander usually adds multiple voices to your core module's architecture. A voice module is a standalone oscillator/filter/amp setup, often with its own independent controls.
I'm new to modular - is this the right place to start?
It depends. If your core module is limiting your voice count, an expander is a good next step. But if you're completely new, consider a smaller, more self-contained module to learn the basics first.
