AudioFu Chart · November 2026
Best Interface Modules Under $300 2026
The top pick is Doepfer A-119 Ext.In External Input / Envelope Follower ($84). Intellijel Designs Stereo I/O 1U leads the high end. Ranked by the AudioFu Index from 50 models across 18 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.
-
Doepfer A-119 Ext.In External Input / Envelope Follower
A-119 · Doepfer
14 for sale on Reverb2 finishes at Thomann
The A-119 is a workhorse module for integrating external sounds into your modular system. It’s fantastic for triggering events based on external audio, or shaping those sounds with its envelope follower. Ideal for experimental musicians and sound designers who want a flexible and affordable interface.
Pros
- Excellent pre-amp gain range for both line and mic signals
- Envelope follower accurately tracks complex audio dynamics
- Balanced input handles low-level signals with impressive clarity
Cons
- Limited routing options compared to more advanced envelope processors
- Gain staging can be tricky, requiring careful adjustment
-
The Befaco InAmp is a really handy little module for bringing in external sounds – think guitars, drum machines, or other synths – into your Eurorack system. It's perfect for those wanting a clean, simple way to interface external gear, especially if you're on a budget and need to save space. The normalization is a nice touch for straightforward routing.
Pros
- Solid build quality with robust metal chassis and tight tolerances
- Flexible dual input design excels with varied signal sources
- Normalization offers a clean, simple signal chain option
Cons
- 3.5mm jacks feel a bit flimsy compared to higher-end options
- Gain range could be wider for extremely quiet or hot signals
77AudioFu
IndexStableno change since Aug 17Aug 17$144 now$144€129 at Thomann · in stockCheck price ↗ -
Doepfer A-190-4 USB / MIDI to CV / Gate / Sync Interface
A-190-4 · Doepfer
11 for sale on Reverb1 finish at Thomann
The A-190-4 is a workhorse for anyone diving into Eurorack. It's a reliable bridge between your computer and your modular, offering straightforward MIDI-to-CV conversion and clocking. Perfect for beginners and experienced users alike who need a dependable, no-frills interface.
Pros
- Rock-solid Doepfer build quality; feels exceptionally durable.
- Clear, easily readable LED display for precise parameter adjustments.
- Comprehensive MIDI implementation; handles multiple MIDI channels effectively.
Cons
- Limited resolution on CV outputs; not ideal for ultra-fine control.
- Power consumption is relatively high for a simple interface module.
72AudioFu
IndexStableno change since Aug 17Aug 17$207 now$207€185 at Thomann · in stockCheck price ↗ -
Expert Sleepers Disting MK4 Multifunction Eurorack Synth Module
Disting mk4 · Expert Sleepers
11 for sale on Reverb1 finish at Thomann
The Disting mk4 is a powerhouse in a tiny package. It’s a fantastic choice for experimental musicians, sound designers, and anyone wanting a modular swiss army knife for complex sound manipulation and sequencing—just be prepared to invest some time learning its intricacies.
Pros
- Incredibly dense feature set for its size, a true Swiss Army knife.
- Micro SD card slot unlocks a vast library of sample possibilities.
- Dot matrix display is surprisingly readable and functional for navigation.
Cons
- 4HP footprint demands careful patching and planning in smaller racks.
- Steep learning curve due to the sheer number of algorithms available.
71AudioFu
IndexStableno change since Aug 17Aug 17$208 now$208€186 at Thomann · in stockCheck price ↗ -
Doepfer A-190-3 USB / MIDI CV / Gate Interface
A-190-3 · Doepfer
5 for sale on Reverb2 finishes at Thomann
The A-190-3 is a solid, no-frills MIDI-CV interface for Doepfer and Eurorack systems. It's perfect for those wanting straightforward integration without complex routing or advanced modulation capabilities – a great entry point into modular MIDI control. It's a workhorse for getting your modular synths playing along with your computer or other MIDI gear.
Pros
- Robust Doepfer build quality ensures long-term reliability.
- Provides essential MIDI-to-CV conversion for modular integration.
- Four CV outputs offer flexibility for multiple modules.
Cons
- Limited resolution compared to more modern MIDI-CV interfaces.
- No velocity or aftertouch support – purely note and gate.
70AudioFu
IndexStableno change since Aug 17Aug 17$140 now$140€125 at Thomann · in stockCheck price ↗ -
The XOH is a remarkably clean and compact stereo output solution for your modular system. It's ideal for anyone needing a reliable way to send your complex synth creations to external speakers or headphones without introducing noise or distortion—especially great for live performance or studio recording where signal integrity is key.
Pros
- Excellent stereo imaging, noticeably wider than typical Eurorack outputs
- Headphone output provides a surprisingly clean and powerful signal
- Compact 6HP footprint maximizes space in tight modular systems
Cons
- Limited routing options beyond simple level adjustments
- 3.5mm jacks can feel a bit fragile with repeated use
64AudioFu
IndexStableno change since Aug 17Aug 17$144 now$144€129 at Thomann · in stockCheck price ↗ -
Expert Sleepers Little Mikey Preamp Eurorack Synth Module
Little Mikey · Expert Sleepers
6 for sale on Reverb1 finish at Thomann
The Little Mikey is a seriously useful little module for anyone needing a clean, flexible preamp in their Eurorack. It's a great way to bring in external signals – vocals, guitars, even vintage synths – without muddying your sound, and the gain range is surprisingly generous. Perfect for modular experimenters and those wanting a dedicated, compact preamp.
Pros
- Excellent gain staging flexibility with the -20dB pad
- Clean, transparent preamplification with minimal coloration
- Hi-Z input handles guitars and other instruments exceptionally well
Cons
- 3.5mm output jacks feel a bit fragile for frequent use
- Limited input options compared to more expansive preamps
63AudioFu
IndexStableno change since Aug 17Aug 17$189 now$189€169 at Thomann · in stockCheck price ↗ -
The Receive 2 is a solid, no-frills audio interface for your modular setup. It’s fantastic for bringing in external signals – think field recordings, piezo instruments, or even vocals – with plenty of clean gain. Ideal for experimental musicians and sound designers who need reliable input without a lot of extra complexity.
Pros
- Excellent gain staging for weak piezo signals
- Joranalogue's robust build quality inspires confidence
- Compact 6TE width saves valuable rack space
Cons
- 3.5mm mix output feels a bit flimsy for heavy use
- Power consumption could be lower for extended operation
63AudioFu
IndexStableno change since Aug 17Aug 17$210 now$210€188 at Thomann · in stockCheck price ↗ -
This little Intellijel is a seriously clean and convenient way to get stereo signals into your modular system. It's a great choice for anyone using Intellijel’s Palette or 7U cases, or building a custom panel – the balanced inputs and mono normalisation really expand your routing options.
Pros
- Excellent balanced input for pristine stereo signals
- Compact 1U form factor ideal for space-constrained systems
- Normalisation to mono simplifies signal routing and flexibility
Cons
- Limited to Intellijel cases or specific panels, restricting placement
- Relatively high power draw for a simple input module
-
The Stereo I/O is a fantastic, no-frills solution for getting audio in and out of your modular system. It’s perfect for anyone needing a clean, reliable interface for recording, sampling, or integrating external instruments – especially if you’re tight on HP. Intellijel’s consistent quality shines through, making it a dependable workhorse.
Pros
- Excellent gain staging provides flexibility for various signal levels.
- Compact 20HP footprint maximizes space in tight Eurorack setups.
- Cue output routing is incredibly useful for monitoring and live performance.
Cons
- 3.5mm headphone jack feels a little flimsy compared to the module's overall build.
- Limited gain range might be restrictive for exceptionally hot signals.
62AudioFu
IndexStableno change since Aug 17Aug 17$240 now$240€215 at Thomann · in stockCheck price ↗
All 50 interface modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Joranalogue Audio Design Transmit 2Joranalogue Audio Design59Stable$218€195$218€195Check ↗
- 12
Befaco Out 1U Eurorack Synthesizer Module1U Out · Befaco58Stable$99€89$99€89Check ↗
- 13
Expert Sleepers ES-6 MK3 CV / Lightpipe Interface Eurorack Synth…ES-6 mk3 · Expert Sleepers58Stable$178€159$178€159Check ↗
- 14
Befaco CV Thing Eurorack Synthesizer ModuleCV Thing · Befaco58Stable$278€249$278€249Check ↗
- 15
Xaoc Devices Sewastopol II Audio Port & Voltage ExpanderSewastopol II · XAOC Devices57Stable$290€259$290€259Check ↗
- 16
Doepfer A-190-8 USB / MIDI Sync InterfaceA-190-8 · Doepfer56Stable$140€125$140€125Check ↗
- 17
Intellijel Designs MIDI 1UIntellijel Designs56Stable$255€228$255€228Check ↗
- 18
Intellijel Designs uMIDIIntellijel Designs56Stable$274€245$274€245Check ↗
- 19
Intellijel Designs Pedal I/O JACKS 1UIntellijel Designs52Stable$27€24$27€24Check ↗
- 20
Intellijel Designs Headphones 1UIntellijel Designs52Stable$87€78$87€78Check ↗
- 21
Intellijel Designs Pedal I/O 1U V2Intellijel Designs50Stable$115€103$115€103Check ↗
- 22
Intellijel Designs StompIntellijel Designs50Stable$234€209$234€209Check ↗
- 23
Doepfer A-139-2 Headphone AmplifierDoepfer49Stable$66€59$66€59Check ↗
- 24
Doepfer A-190-7 1UDoepfer49Stable$72€64$72€64Check ↗
- 25
Doepfer A-119-2Doepfer49Stable$73€65$73€65Check ↗
- 26
Doepfer A-192-2Doepfer49Stable$144€129$144€129Check ↗
- 27
Befaco 1U STAmpBefaco48Stable$88€79$88€79Check ↗
- 28
Befaco Output V3Befaco48Stable$161€144$161€144Check ↗
- 29
Expert Sleepers NTX-8CVExpert Sleepers48Stable$222€199$222€199Check ↗
- 30
Befaco I4 Instrument InterfaceBefaco48Stable$263€235$263€235Check ↗
- 31
Intellijel Designs Line Out 1UIntellijel Designs46Stable$44€39$44€39Check ↗
- 32
Behringer CM1A MIDI to CV Eurorack ModuleCM1A · Behringer46Stable$44€39$44€39Check ↗
- 33
ADDAC 309 CV to ExpressionADDAC46Stable$84€75$84€75Check ↗
- 34
Intellijel Designs Stereo Out 1UIntellijel Designs46Stable$87€78$87€78Check ↗
- 35
ADDAC 200PI Pedal IntegratorADDAC46Stable$129€115$129€115Check ↗
- 36
Intellijel Designs OutsIntellijel Designs46Stable$188€168$188€168Check ↗
- 37
ADDAC 710 Balanced OutputsADDAC46Stable$207€185$207€185Check ↗
- 38
Behringer Cu1ABehringer44Stable$53€47$53€47Check ↗
- 39
4ms Listen IO4ms44Stable$155€139$155€139Check ↗
- 40
4ms Percussion Interface + Exp.4ms44Stable$178€159$178€159Check ↗
- 41
Vermona Modular Twin OutVermona Modular44Stable$290€259$290€259Check ↗
- 42
NANO Modules ST-INNANO Modules43Stable$151€135$151€135Check ↗
- 43
NANO Modules ST-OUTNANO Modules43Stable$151€135$151€135Check ↗
- 44
BASTL Instruments 1983 Polyphonic MIDI to CV Interface1983 · Bastl Instruments43Stable$256€229$256€229Check ↗
- 45
Rides In The Storm CONRides In The Storm41Stable$73€65$73€65Check ↗
- 46
Erica Synths Pico OutputErica Synths41Stable$106€95$106€95Check ↗
- 47
vpme.de trig31vpme.de41Stable$151€135$151€135Check ↗
- 48
Strymon AA1 Level ShifterStrymon41Stable$154€138$154€138Check ↗
- 49
Hexinverter Électronique Mutant BrainHexinverter Électronique41Stable$233€208$233€208Check ↗
- 50
Behringer Perfect Pitch PP1 Eurorack ModulePerfect Pitch PP1 · Behringer40Stable$83€74$83€74Check ↗
Interface Modules by the numbers
Measured across all 52 models we track, not a sample.
Median $151 — half of all interface modules here cost less.
How to choose the best interface modules
Audio Quality
This isn't about pristine, studio-grade sound; it's about minimizing noise and distortion. A little hiss is expected, but we're listening for that ice-picky harshness or muddy low-end that makes a mix fall apart. Headroom is important, especially if you're running hot signals.
Latency
Crucial for real-time playing and monitoring. High latency feels like a disconnect and kills your groove. We're looking for anything under 10ms roundtrip for a playable experience, and ideally closer to 5ms.
Connectivity
How many inputs and outputs do you really need? USB 2.0 is pretty standard in this price range, so don't expect Thunderbolt speeds. Multiple outputs are a huge plus for routing to different monitors or effects.
Build Quality
Let's be honest, plastic cases are common at this price point. We're assessing how sturdy the module feels, how well the jacks are secured (loose jacks are a nightmare), and overall construction. A flimsy build screams future repairs.
Software/Driver Stability
A beautiful interface is useless if the drivers crash every five minutes. We're evaluating ease of setup, driver reliability across different operating systems (Windows, macOS), and overall software support.
Buying guide
So, you're diving into the modular world, which is awesome, but that Eurorack rabbit hole can eat your wallet alive fast. Interface modules are crucial-they're the bridge between your synths and your DAW, or even just your headphones for practice. Finding a good one under $300 isn't impossible, but you gotta know what to look for; we're gonna break down the best options for getting solid functionality without breaking the bank.
At this price, you're making trade-offs. You're likely sacrificing some of the premium features - like ultra-low noise floors or advanced routing capabilities - found in higher-end modules. Don't expect pristine audio; look for a module that gets the job done without introducing noticeable artifacts.
Pay attention to the jack quality - cheap jacks can introduce noise and intermittent signal loss. Consider your workflow-do you need multiple outputs for complex routing, or is a simple stereo in/out sufficient?
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 52 interface 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
What's the deal with USB 2.0 latency?
USB 2.0 has inherent limitations. While drivers can help, you'll rarely get sub-2ms latency consistently. Realistically, aim for under 10ms and adjust buffer sizes accordingly. Experiment to find what feels comfortable for your playing.
Can I use these for recording vocals or acoustic instruments?
You can, but these aren't designed for professional vocal or acoustic recording. The preamps are usually basic, lacking the clean gain and low noise of dedicated mic preamps. They're better suited for synths and line-level signals.
What does 'phantom power' mean and do I need it?
Phantom power (48V) is needed to power condenser microphones. If you're only using synths or dynamic microphones, you don't need it and shouldn't enable it.
Are these modules compatible with all DAWs?
Generally, yes. Most modules use standard ASIO (Windows) or Core Audio (macOS) drivers. However, always check the manufacturer's website for compatibility lists and driver downloads for your specific DAW version.
What's the difference between a simple audio interface and a 'module'?
A module is designed to be integrated into a Eurorack modular synthesizer system. It's a smaller, self-contained unit with a standard 3.5mm panel format. A traditional audio interface is a standalone device.
