AudioFuAudioFu Chart · October 2026
Best Logic Modules 2026
The top pick is Doepfer A-150 Dual Voltage Controlled Switch ($72). Schlappi Engineering BTMX leads the high end. Ranked by the AudioFu Index from 16 models across 7 brands, prices checked every night.
Last updated: October 15, 2026
Narrow the chart
All Logic ModulesTop 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
-
The A-150 is a rock-solid, bare-bones dual switch – exactly what you need when you want clean, reliable routing without extra frills. It’s perfect for modular beginners or experienced patchers who need a small, efficient way to direct signals. This is a workhorse module, plain and simple.
Pros
- Reliable Doepfer build quality, known for longevity
- Simple, clean switching action – no unwanted noise
- Compact 4HP footprint maximizes patching density
Cons
- Limited voltage range (-8V to +8V) restricts some applications
- Basic functionality; lacks advanced features of more complex routers
82AudioFu
Index↓ 1.5%since Aug 14 · lowest so far$73 · Aug 14$72 now$72€64 at Thomann · in stockCheck price ↗ -
The A-166 is a solid, no-frills logic module from Doepfer, perfect for those getting into modular synthesis or needing a reliable foundation for basic sequencing and pattern generation. Its straightforward design and compact size make it an excellent choice for smaller racks, though experienced modular users might find it a bit limiting for intricate workflows.
Pros
- Reliable Doepfer build quality ensures long-term stability.
- Compact 8HP footprint maximizes patching flexibility.
- Clear LED indication simplifies complex logic operations.
Cons
- Limited input count restricts complex signal routing.
- Basic functionality lacks advanced features of pricier modules.
-
The Compare 2 is a seriously clever module for anyone wanting to turn audio or CV into intricate rhythmic patterns. It’s incredibly versatile for creating unique sequences and complex gate patterns, and the compact size makes it a great addition to smaller Eurorack cases – especially for experimental musicians and sound designers.
Pros
- Highly flexible rhythmic extraction from diverse audio sources
- Shift and Size controls offer nuanced pattern shaping
- Comprehensive logic section expands rhythmic possibilities significantly
Cons
- Limited input headroom can cause clipping with hot signals
- Logic section's complexity demands a learning curve for beginners
69AudioFu
IndexStableno change since Aug 14Aug 14$212 now$212€189 at Thomann · in stockCheck price ↗ -
The Klavis ComPair is a seriously useful little module for anyone diving into more advanced sequencing and modulation techniques. Its compact size and multiple comparator modes make it a great choice for tight racks and adding rhythmic complexity to your patches. If you're into generative music or experimental sound design, this is a great, affordable tool to get into the game.
Pros
- Excellent voltage control for dynamic sequencing and modulation.
- Window comparator mode opens creative rhythmic possibilities.
- Compact 3HP footprint maximizes valuable rack space.
Cons
- Limited input flexibility compared to more complex comparators.
- 3HP size restricts more intricate routing options.
67AudioFu
Index↓ 17.8%since Aug 14 · lowest so far$151 · Aug 14$124 now$124€111 at Thomann · in stockCheck price ↗ -
The Klavis Logica XT Black is a tiny powerhouse for gate manipulation. It's perfect for experimental electronic musicians and those needing precise, compact logic sequencing within their modular setup—just be mindful of its current draw and the initial learning curve involved in mastering its modes.
Pros
- Extremely compact 5HP footprint maximizes precious Eurorack space.
- 14 operating modes offer surprising flexibility for gate sequencing.
- Klavis’s build quality is consistently excellent; feels rock solid.
Cons
- Limited input count (3) can be restrictive in complex setups.
- 21mA current draw is noticeable, especially in power-constrained systems.
62AudioFu
Index↓ 7.2%since Aug 14 · lowest so far$156 · Aug 14$144 now$144€129 at Thomann · in stockCheck price ↗ -
The BTMX is a seriously clever little module. It’s perfect for experimental sound designers and anyone wanting to build complex modulation sequences – think granular processing, rhythmic gate patterns, or creating intricate control systems. Schlappi’s attention to detail really shines here, offering a robust and functional logic solution for your modular system.
Pros
- Four channels offer significant routing flexibility for complex patterns.
- Logic functions expand modulation possibilities beyond simple mixing.
- Compact 8HP footprint saves precious space in dense racks.
Cons
- Limited input count per channel restricts intricate signal manipulation.
- Stepped CV output lacks fine-grained control for subtle modulation.
60AudioFu
Index↓ 6.7%since Aug 14 · lowest so far$234 · Aug 14$218 now$218€195 at Thomann · in stockCheck price ↗ -
The Two Bits is a remarkably powerful logic module, a true workhorse for complex sequencing and modulation. It's perfect for experimental sound designers and anyone needing to build intricate, automated patterns—just be prepared to dive deep into its operating modes to unlock its full potential. The compact size is a bonus for those with limited rack space.
Pros
- Incredibly dense feature set for its size, offering immense sequencing flexibility.
- Chain switches enable complex logic sequences beyond individual channels.
- LED status indicators provide clear visual feedback for troubleshooting and patching.
Cons
- 5 TE width can be limiting in smaller Eurorack cases; a bit wide.
- The sheer number of modes demands significant time investment to fully master.
58AudioFu
IndexStableno change since Aug 14Aug 14$156 now$156€139 at Thomann · in stockCheck price ↗ -
The Nibbler Black is a quirky little logic module that’s surprisingly deep. It’s perfect for experimental musicians and sound designers who love digging into digital rhythms and complex modulation – think glitchy percussion or evolving sequences. If you’re comfortable with a bit of a learning curve, you’ll unlock some seriously unique sounds.
Pros
- Cherry MX Braun button feels incredibly robust and satisfying.
- 4-bit accumulator provides surprising rhythmic complexity.
- Flexible input options allow for intricate modulation possibilities.
Cons
- 4-bit resolution limits the precision of some control voltage outputs.
- Steep learning curve for users unfamiliar with digital logic modules.
56AudioFu
IndexStableno change since Aug 14Aug 14$268 now$268€239 at Thomann · in stockCheck price ↗ -
The A-150-1 VE is a solid, no-frills dual switch for your modular rig. It’s a reliable workhorse for re-routing signals and creating interesting modulation pathways, especially valuable for those who want to experiment with signal flow without breaking the bank. This is a great starting point for someone building a basic modular system or expanding an existing one.
Pros
- Reliable Doepfer build quality ensures long-term stability.
- Dual switching expands routing possibilities within a modular system.
- Compact 4TE width fits comfortably in most Eurorack setups.
Cons
- Limited functionality compared to more complex logic modules.
- Black front panel can be a fingerprint magnet – a common Doepfer trait.
-
The A-165-2 is a solid, no-frills logic module from Doepfer, perfect for those building sequencing and control systems. It’s a great way to create complex trigger patterns and manipulate clock signals without needing a full-blown sequencer module – a real workhorse for any modular enthusiast.
Pros
- Doepfer's robust construction ensures reliable, long-term operation within a modular system.
- The toggle flip-flop provides a simple yet powerful logic function for sequencing.
- Compact 2HP size maximizes space efficiency in dense Eurorack configurations.
Cons
- Limited to logic signals; unsuitable for audio processing, restricting its versatility.
- The 2HP width can be a constraint in smaller modular setups.
All 16 logic modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Doepfer A-152 Addressed T&H/SwitchA-152 · Doepfer49Stable$189€169$189€169Check ↗
- 12
XAOC Devices ErfurtXAOC Devices44Stable$167€149$167€149Check ↗
- 13
XAOC Devices PoczdamXAOC Devices44Stable$218€195$218€195Check ↗
- 14
Joranalogue Audio Design Walk 4Joranalogue Audio Design44Stable$301€269$301€269Check ↗
- 15
Shakmat Modular SumDifShakmat Modular43↓ 2.3%$97€87$97€87Check ↗
- 16
Intellijel Designs ORIntellijel Designs42Stable$54€48$54€48Check ↗
Logic Modules by the numbers
Measured across all 21 models we track, not a sample.
Median $156 — half of all logic modules here cost less.
How to choose the best logic modules
Oscillators
It's the core. Look beyond just waveforms; consider stability (drift), pulse width modulation (PWM) capabilities, sync options, and overall harmonic content. A gritty, aliasing oscillator can be a huge asset for textures, while a clean sine wave is essential for pads and sub-bass. Cheap oscillators often have a noticeable drift, especially at higher pitches.
Filters
The heart of your sound. Resonance is key - does it scream, or just gently swell? Filter type (Moog ladder, SSI, Korg MS-20) drastically alters the character. Listen for that sweet spot where the filter self-oscillates and creates interesting feedback. Budget filters can sound muddy or thin out the low end.
Envelopes (ADSR)
Dynamics are everything. Fast attack times for snappy percussion, long release times for evolving pads. Consider multiple envelopes and looping capabilities. Poorly implemented envelopes can feel sluggish or lack precision, killing the feel of a patch.
Modulation Sources (LFOs, VCAs, etc.)
The glue that holds it all together. Look for multiple waveforms, flexible routing, and decent range. A weak LFO can make a great oscillator sound lifeless. Complex modulation sources like wavefolders or phase distortion add serious sonic possibilities.
Utility Modules (Attenuators, Mixers, VCAs)
Don't sleep on these! They're the unsung heroes. An attenuator lets you tame unruly signals, a mixer blends them, and a VCA controls amplitude. These are crucial for shaping and controlling your sound, and often overlooked when people focus solely on the 'sexy' modules.
Buying guide
So, you're diving into the modular world, huh? It's a rabbit hole, but a rewarding one. Logic Modules, those Eurorack building blocks, are where the real magic happens-forget presets, this is about crafting sounds from the ground up. Let's break down what to look for to avoid dropping a bunch of cash on modules that just sit there gathering dust.
Modular is expensive, so be smart. Don't chase hype - listen to demos and read reviews critically. Used gear is your friend, but check for wear and tear on pots and jacks.
A few well-chosen modules that you really understand will go further than a rack full of things you don't use.
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 21 logic 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 difference between a 'Logic Module' and a Eurorack module?
'Logic Module' is just a term we're using to refer to any Eurorack module that offers a lot of control and flexibility. It's not an official designation.
I'm new to modular, where should I start?
Start with the basics: oscillator, filter, envelope, VCA, and a power supply. A simple mixer is also a great addition. Don't try to build a massive system right away.
What's 'voltage control' and why is it important?
Voltage control means a parameter (like filter cutoff or oscillator pitch) is controlled by a voltage signal. This is what allows for dynamic, evolving sounds and complex modulation patterns.
Can I use third-party power supplies?
Absolutely, but be careful. Make sure it provides enough current per rail and is reliable. A power supply failure can damage your modules.
What does 'aliasing' mean in the context of oscillators?
Aliasing is when frequencies higher than the Nyquist frequency (half the sampling rate) fold back into the audible range, creating a gritty, distorted sound. Some oscillators are designed to exploit aliasing for character.
