AudioFuAudioFu Chart · October 2026
Best Noise Modules Under $100 2026
The top pick is Doepfer A-118 Noise and Random Voltage Generator ($77). Behringer 903A Random Signal Generator Eurorack Synthesizer Module gives you the most for the money at $21. Ranked by the AudioFu Index from 5 models across 2 brands, prices checked every night.
Last updated: October 15, 2026
Top 5
Full detail for the 5 highest AudioFu Index scores. Every other model is listed below.
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Doepfer A-118 Noise and Random Voltage Generator
A-118 Noise/Random · Doepfer
12 for sale on Reverb2 finishes at Thomann
The A-118 is a workhorse noise module, pure and simple. It’s fantastic for creating evolving textures, subtle rhythmic modulation, and adding a bit of unpredictable character to your patches. Perfect for experimental sound designers and those wanting a reliable, budget-friendly noise source in their Eurorack.
Pros
- Classic Doepfer build quality: robust, reliable, and feels very solid.
- Versatile noise generation: white, coloured, and genuinely useful random voltage.
- Low-frequency random voltage ideal for subtle modulation and rhythmic patterns.
Cons
- Limited control compared to more advanced noise modules.
- Power draw could be a factor in systems with limited power supplies.
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Behringer 903A Random Signal Generator Eurorack Synthesizer Module
903A Random Signal Generator · Behringer
3 for sale on Reverb1 finish at Thomann
This little Behringer 903A is a seriously useful addition to any Eurorack setup, especially if you're on a tight budget. It’s a workhorse for generating basic noise textures, great for beginners exploring sound design or experienced modular users needing a reliable, compact noise source. It’s not going to blow your mind with exotic sounds, but it’s a solid foundation for experimentation.
Pros
- Excellent value for a functional analogue noise source
- Pink noise implementation is surprisingly smooth and musical
- Compact 4HP footprint saves precious rack space
Cons
- Construction feels a little plasticky, typical of the price point
- Limited output level control; can be quite loud
65AudioFu
Index↓ 44.1%since Aug 14 · lowest so far$38 · Aug 14$21 now$21€19 at Thomann · in stockCheck price ↗ -
The A-118-2 is a surprisingly capable noise generator for the price. It’s a great starting point for anyone dipping their toes into modular synthesis or needing a compact, reliable source of random elements – perfect for generative patches, percussive textures, or subtle modulation. The random voltage output is particularly useful for adding unpredictable movement.
Pros
- Excellent noise quality, surprisingly clean and usable.
- Versatile random voltage output with useful level control.
- Track/Hold and Sample/Hold modes offer creative modulation.
Cons
- Limited noise color shaping compared to more expensive modules.
- The level control can be a bit fiddly with fast changes.
61AudioFu
Index↓ 5.9%since Aug 14 · lowest so far$95 · Aug 14$90 now$90€80 at Thomann · in stockCheck price ↗ -
The A-117-2 is a workhorse noise module – simple, reliable, and sounds great. It’s a fantastic starting point for anyone exploring noise generation in Eurorack, or a useful utility for experienced users needing a compact, flexible noise source. Its clean digital character is surprisingly versatile.
Pros
- Excellent noise quality, surprisingly rich and textured for a digital module.
- Wide frequency range (50-40kHz) allows for subtle to harsh noise.
- Compact 4HP footprint makes it ideal for dense modular setups.
Cons
- Limited output options; bipolar/unipolar can restrict certain patching scenarios.
- Relatively basic functionality compared to more complex noise generators.
51AudioFu
Index↓ 3.7%since Aug 14 · lowest so far$92 · Aug 14$88 now$88€79 at Thomann · in stockCheck price ↗ -
This little Behringer module is a seriously clever way to inject chaos into your Eurorack system. It’s perfect for experimental sound designers, ambient artists, or anyone looking to add unpredictable textures without a huge investment. The noise and random voltage generation are surprisingly versatile for the size and price.
Pros
- Excellent noise source for textural soundscapes
- Random voltage generators add unpredictable movement
- Tiny footprint (14HP) maximizes modular space
Cons
- Plastic construction feels less robust than higher-end modules
- Limited control beyond basic level and attenuation
How to choose the best noise modules
Noise Types
Beyond just 'white noise,' look for modules offering pink, red, or even filtered variations. Pink noise is warmer and more natural, great for pads and subtle textures. Red noise is even darker, lending itself to deep, rumbling tones.
Modulation Input
Can you modulate the noise's pitch, density, or timbre? A simple envelope follower can turn static into percussive blasts, while LFOs add subtle movement and interest. Static noise is boring; controllable noise is a starting point.
Output Level & Headroom
Low-budget modules can sometimes be quiet, or worse, prone to clipping easily. Check if the module has an attenuator to tame the signal. Headroom is important if you plan on running it through distortion or other gain stages.
Filtering Options
A built-in filter is a huge bonus. It lets you shape the noise's frequency content, turning harsh hiss into something usable. A resonant filter can create screaming textures and feedback loops.
Build Quality
Let's be real, $100 modules aren't built like Eurorack tanks. Look for sturdy jacks and a decent panel finish. Fragile modules aren't fun when they're getting bumped on stage or packed up for a gig.
Buying guide
Alright, so you're diving into the modular world and need some grit - noise is your friend. But dropping serious cash on a noise module? Not always the move. I've seen plenty of folks start modular with a single, well-chosen noise source, and honestly, you can get seriously usable sounds without breaking the bank. Let's look at some decent noise modules you can snag for under $100.
At this price point, you're making trade-offs. Expect some compromises in build quality - the jacks might be a bit wobbly, and the panel might feel thin. Don't expect a ton of features either; you're primarily getting a noise source, maybe with some basic filtering.
Prioritize modules with modulation inputs and some filtering options - those small additions make a huge difference in versatility and sonic possibilities. If you're serious about modular, this is a great starting point, but budget for upgrades later.
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 6 noise 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
Is a $100 noise module really any good?
It depends on your needs. For basic noise sounds and experimenting, absolutely. Don't expect boutique-level fidelity or a ton of features. It's a tool for getting started and exploring, not a flagship module.
Can I use this for percussion?
Definitely! White, pink, or red noise can be shaped into surprisingly convincing percussive sounds with envelopes and filters. Experiment with short, sharp bursts and resonant filter sweeps.
What's the difference between white and pink noise?
White noise is like static - bright and harsh. Pink noise has more low-end content, making it sound warmer and less fatiguing. It's generally more pleasant for pads and drones.
I'm new to modular, where do I start?
Noise modules are a great starting point! They're simple to understand and offer a lot of creative potential. Combine it with a VCF and an envelope generator to get a feel for basic patching.
Are there any modules that come close to the $100 mark?
You'll find some clones or budget brands that can sneak in under $100, but quality can vary wildly. Research the brand and read reviews before buying. Sometimes, waiting a little longer and saving up for something a bit better is worth it.
