AudioFuAudioFu Chart · October 2026
Best Sound Modules Under $500 2026
The top pick is Behringer TD-3 Analog Bass Line Synthesizer ($111). Roland JU-06A Boutique Series Synthesizer Module leads the high end. Ranked by the AudioFu Index from 58 models across 21 brands, prices checked every night.
Last updated: October 14, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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Behringer TD-3 Analog Bass Line Synthesizer
TD-3-SR · Behringer
23 for sale on Reverb6 finishes at Thomann
- Weight0.8 kg
This little box delivers a surprisingly authentic analog bass experience for the price. It's fantastic for basslines, sequenced grooves, and adding some grit to external signals—a great starting point for synth exploration or a fun addition to an established studio. Ideal for producers on a budget or anyone wanting a compact, classic bass sound.
Pros
- Solid analog circuitry delivers a surprisingly warm, punchy bass tone
- Compact size and lightweight design make it highly portable
- The sequencer's 250 pattern memory is genuinely useful for composing
Cons
- Plastic enclosure feels a little flimsy, lacking premium build quality
- Limited sound palette compared to more versatile synthesizers
87AudioFu
Index↓ 6.6%since Aug 14 · lowest so far$119 · Aug 14$111 now$111€99 at Thomann · in stockCheck price ↗ -
- Weight1.8 kg
The Pro-1 is a surprisingly capable and affordable analog synth, bringing a classic Moog-inspired voice to a wider audience. Its dual VCOs and flexible modulation routings make it ideal for sound designers, electronic musicians, and anyone craving that authentic analog grit. It's a great entry point into the world of analog synthesis, or a useful voice for more experienced users.
Pros
- Dual CEM3340 VCOs deliver rich, classic analog warmth
- Comprehensive modulation options enable complex sound design
- Sequencer and arpeggiator add immediate creative possibilities
Cons
- Plastic case feels less robust than higher-end synths
- Limited polyphony restricts chordal playing flexibility
72AudioFu
Index↓ 6.3%since Aug 14 · lowest so far$211 · Aug 14$198 now$198€177 at Thomann · in stockCheck price ↗ -
Behringer Neutron Paraphonic Analog and Semi-Modular Synthesizer
NEUTRON · Behringer
21 for sale on Reverb1 finish at Thomann
- Weight2 kg
The NEUTRON is a seriously cool little synth, especially for folks diving into the world of modular or wanting that classic analog vibe without the huge price tag. It’s surprisingly versatile thanks to the semi-modular design and those CEM chips really nail the vintage sound. Perfect for experimental musicians, sound designers, or anyone wanting a compact analog voice.
Pros
- CEM3340 chips deliver a classic, warm, and punchy analog sound.
- Semi-modular design allows for extensive patching and experimentation.
- The analog BBD delay adds a genuine vintage vibe and character.
Cons
- Paraphony limits true polyphonic capabilities; layering can get muddy.
- Plastic case feels a little flimsy, lacks premium build quality.
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Dreadbox Erebus Reissue Desktop 2-Voice Paraphonic Synthesizer
Erebus Reissue · Dreadbox
17 for sale on Reverb1 finish at Thomann
- Weight1 kg
The Erebus Reissue is a fantastic little powerhouse. It’s got that raw, unfiltered analog vibe that’s hard to replicate, and the paraphonic nature gives it a lot of character. If you're a sound designer or someone who loves gritty, evolving sounds, especially in a modular environment, this is a seriously fun and affordable option.
Pros
- Rich, complex analog tones with a distinctively gritty character.
- The hard sync function delivers truly unique, evolving textures.
- Compact Eurorack format maximizes desk space or modular integration.
Cons
- Paraphonic limitations restrict layering complex polyphonic sounds.
- Lo-fi delay can be a bit muddy, lacks clarity for pristine sounds.
67AudioFu
Index↓ 5.3%since Aug 14 · lowest so far$424 · Aug 14$402 now$402€359 at Thomann · in stockCheck price ↗ -
- Weight1 kg
This is a great little monophonic synth for solo leads. The two analogue oscillators give it a warm, organic feel that digital synths sometimes lack. It plays well with the built-in effects and filter. If you want to play chords, you will need a different tool, but for expressive single-note lines, it is perfect.
Pros
- Two analogue voltage controlled oscillators create warm analog tone
- 24 dB low pass filter shapes the sound with analog character
- 12 digital effects let you add texture to any patch
Cons
- Monophonic design means no chord playing capability
- Power supply adapter is not included in the box
67AudioFu
IndexStableno change since Aug 17Aug 17$431 now$431€385 at Thomann · in stockCheck price ↗ -
Behringer Grind Hybrid Semi-Modular Synthesizer
Grind · Behringer
6 for sale on Reverb1 finish at Thomann
- Weight1.52 kg
The Grind is a fascinating, budget-friendly beast. It’s packed with digital engines and a warm analogue filter, giving you a huge range of sounds. It's perfect for sound designers, experimental musicians, and those wanting to dive deep into synthesis without breaking the bank, but be prepared for a steep learning curve.
Pros
- Brain modules offer incredible sonic depth and experimentation.
- Analogue ladder filter delivers classic, warm, and gritty tones.
- 32-step sequencer enables complex, evolving patterns easily.
Cons
- Build quality feels plasticky, lacking premium robustness.
- The sheer number of engines can be overwhelming for beginners.
66AudioFu
Index↓ 15.9%since Aug 14 · lowest so far$211 · Aug 14$178 now$178€159 at Thomann · in stockCheck price ↗ -
- Weight0.75 kg
This synth feels like a mini version of the big Waldorf you might know. It uses the same old chip to make that unique, slightly gritty 8-bit sound. It's great for producers who want that specific retro feel without needing a whole rack. The metal body makes it sturdy for transport, and the built-in sequencer lets you make patterns without extra gear. It's a solid choice for anyone hunting that classic microwave sound.
Pros
- Replicates classic 8-bit quantization and aliasing sound
- Uses original Waldorf ASIC chip for authentic tone
- Includes all original Microwave 1 wavetable data
Cons
- Only two wavetable oscillators limit layering options
- No built-in drum samples or percussion sounds
66AudioFu
IndexStableno change since Aug 17Aug 17$357 now$357€319 at Thomann · in stockCheck price ↗ -
Behringer Crave Analog Semi-Modular Synthesizer
Crave · Behringer
7 for sale on Reverb1 finish at Thomann
- Weight1.5 kg
The Behringer Crave is a surprisingly capable little synth, especially considering the price. It's a fantastic entry point into analog synthesis and modular patching, perfect for beginners and those wanting a portable, hands-on experience. The CEM3340 chip gives it a distinct vintage vibe that's hard to resist.
Pros
- CEM3340 VCO delivers a surprisingly rich, vintage analog character
- Compact size makes it ideal for small spaces and travel
- Step sequencer and arpeggiator offer immediate creative possibilities
Cons
- Plastic build feels a little flimsy compared to higher-end synths
- Limited polyphony restricts complex chord voicings and arrangements
65AudioFu
Index↓ 10.7%since Aug 14 · lowest so far$167 · Aug 14$149 now$149€133 at Thomann · in stockCheck price ↗ -
Behringer SY-1 Syncussion Percussion Synthesizer
Syncussion SY-1 · Behringer
4 for sale on Reverb1 finish at Thomann
- Weight1.9 kg
The SY-1 is a quirky little box that nails the vibe of a classic, budget-friendly drum synth. It's fantastic for experimental electronic music producers, modular synth enthusiasts, or anyone wanting to add some raw, vintage percussion to their tracks. Don't expect a full drum kit, but for unique sounds and immediate control, it's a winner.
Pros
- Unique oscillator modes offer surprising sonic textures.
- Eurorack format provides immense modular integration possibilities.
- 30 controls allow for deep, immediate performance manipulation.
Cons
- Build quality feels plasticky; lacks premium component feel.
- Limited sound palette; primarily percussion-focused, not versatile.
63AudioFu
Index↓ 17.4%since Aug 14 · lowest so far$218 · Aug 14$180 now$180€161 at Thomann · in stockCheck price ↗ -
Roland JU-06A Boutique Series Synthesizer Module
JU-06A · Roland
45 for sale on Reverb2 finishes at Thomann
The JU-06A is a surprisingly capable little box, offering a genuine taste of Juno-era Roland sounds in a very accessible package. It's perfect for producers wanting that classic synth vibe without a massive, expensive setup, or for keyboardists needing a portable Juno sound source. Don't expect a full-featured workstation, but for its size and price, it's a lot of fun.
Pros
- Excellent ACB engine captures Juno warmth convincingly
- Compact size makes it ideal for travel and smaller spaces
- Arpeggiator and sequencer offer creative performance possibilities
Cons
- Static filter design limits dynamic filter sweeps and expressiveness
- Polyphony of 4 voices can feel restrictive for lush pads
63AudioFu
Index↓ 1.0%since Aug 14 · lowest so far$446 · Aug 14$442 now$442€395 at Thomann · in stockCheck price ↗
All 58 sound modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Behringer MDX2600 Composer Pro-XL Compressor / Limiter2600 · Behringer62↓ 16.8%$371€332$371€332Check ↗
- 12
Novation Circuit Tracks GrooveboxCircuit Tracks · Novation62↑ 19.1%$420€375$420€375Check ↗
- 13
Korg Nu:Tekt NTS-1 MKII DIY Digital KitNu:Tekt NTS-1 MKII · Korg58↓ 18.2%$145€130$145€130Check ↗
- 14
Roland JX-08 Boutique Series Polyphonic Synthesizer ModuleJX-08 · Roland58↓ 3.7%$408€365$408€365Check ↗
- 15
Behringer SpiceBehringer57↓ 10.8%$248€222$248€222Check ↗
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Dreadbox Hades Reissue Desktop Monophonic SynthesizerHades Reissue · Dreadbox57↓ 1.3%$330€295$330€295Check ↗
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Behringer Edge 16-Voice Percussion SynthesizerEdge · Behringer56↑ 3.6%$162€145$162€145Check ↗
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Roland TM-2 Compact Acoustic Drum Trigger ModuleTM-2 Trigger Module · Roland56↑ 14.4%$267€239$267€239Check ↗
- 19
Behringer Proton Desktop Semi-Modular SynthesizerProton · Behringer56Stable$357€319$357€319Check ↗
- 20
Behringer 2600 Blue MarvinBehringer55↓ 7.5%$453€405$453€405Check ↗
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Behringer 2600 Gray MeanieBehringer55↓ 6.7%$453€405$453€405Check ↗
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Behringer WASP Deluxe Desktop SynthesizerWASP Deluxe · Behringer54Stable$150€134$150€134Check ↗
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Behringer K-2 MKIIBehringer53↓ 3.6%$211€189$211€189Check ↗
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Behringer JT-2Behringer52Stable$200€179$200€179Check ↗
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Behringer Model 15Behringer52↓ 0.5%$222€198$222€198Check ↗
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Behringer Model DBehringer52Stable$223€199$223€199Check ↗
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Behringer BDS-3Behringer52Stable$279€249$279€249Check ↗
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Behringer Pro-800 Desktop 8-Voice SynthesizerPro-800 · Behringer51Stable$279€249$279€249Check ↗
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Roland JD-08 Boutique Series Programmable Synthesizer ModuleJD-08 · Roland51↑ 6.1%$390€349$390€349Check ↗
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Behringer Powerplay P2 Personal In-Ear Monitor Headphone Amp2-XM · Behringer50Stable$390€349$390€349Check ↗
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MB Music PRO.XSMB Music49Stable$375€335$375€335Check ↗
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Behringer Cat Duophonic Analog Synthesizer 2020CAT · Behringer47↓ 4.1%$181€162$181€162Check ↗
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Roland EC-10M ELCajon Mic ProcessorRoland47↑ 21.6%$352€315$352€315Check ↗
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Dreadbox Nyx REDreadbox47Stable$435€389$435€389Check ↗
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1010music nanobox lemondrop1010music45↓ 4.6%$469€419$469€419Check ↗
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V3 Sound Bluetooth ReceiverV3 Sound44Stable$100€89$100€89Check ↗
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Dtronics DT-DXDtronics44↓ 1.6%$413€369$413€369Check ↗
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ddrum DDTI Trigger InterfaceDDTI Trigger Interface · DDrum43Stable$189€169$189€169Check ↗
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Behringer Toro Analog Bass SynthesizerToro · Behringer42↓ 8.2%$162€145$162€145Check ↗
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Millenium MPS-150 Drum ModuleMillenium41Stable$100€89$100€89Check ↗
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Millenium MPS-450 Drum ModuleMillenium41Stable$144€129$144€129Check ↗
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Millenium MPS-850 Drum ModuleMillenium41Stable$222€198$222€198Check ↗
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Millenium MPS-750X E-Drum ModuleMillenium41Stable$222€198$222€198Check ↗
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Cre8Audio East Beast Semi-Modular Analog SynthesizerEast Beast · cre8audio41↓ 4.2%$256€229$256€229Check ↗
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Millenium MPS-1000 E-Drum ModuleMillenium41Stable$445€398$445€398Check ↗
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Behringer Kobol ExpanderBehringer37Stable$172€154$172€154Check ↗
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Dato DUODato36↑ 16.2%$402€359$402€359Check ↗
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Behringer Solina String Ensemble 49-Voice SynthesizerSolina String Ensemble · Behringer35↓ 8.0%$205€183$205€183Check ↗
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Roland TM-1 Trigger ModuleRoland35↑ 24.5%$222€198$222€198Check ↗
- 50
Ferrofish B4000+Ferrofish31↓ 5.0%$424€379$424€379Check ↗
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Miditech Pianobox mini IIMiditech30Stable$106€95$106€95Check ↗
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Miditech Pianobox Pro HOSTMiditech30Stable$197€176$197€176Check ↗
- 53
Bastl Instruments Kastle 2 AlchemistBastl Instruments30Stable$211€189$211€189Check ↗
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Stylophone CPM DS-2Stylophone30↓ 3.0%$292€261$292€261Check ↗
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cyma forma RNDcyma forma29Stable$189€169$189€169Check ↗
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Cyclone Analogic TT-303 Bass Bot V2Cyclone Analogic · 2 finishes29Stable$308€275$308€275Check ↗
- 57
Playtime Engineering Blipblox After DarkPlaytime Engineering28↑ 4.6%$256€229$256€229Check ↗
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Playtime Engineering Blipblox SK2Playtime Engineering25↑ 9.6%$256€229$256€229Check ↗
Sound Modules by the numbers
Measured across all 66 models we track, not a sample.
Median $248 — half of all sound modules here cost less.
median of 32 models · 0.7 kg–2 kg
How to choose the best sound modules
Sound Quality
This isn't about 'warmth' or 'brightness,' it's about articulation. Can you hear the individual notes? Does it have a usable low-end thump without getting muddy? Does the sustain ring true, or does it just fade out awkwardly?
Polyphony
32 voices is the bare minimum these days. Anything less and you'll be fighting MIDI limitations in a band setting. Think about layering pads or playing complex chords - you need headroom.
Connectivity
MIDI in/out is a given, but look for USB MIDI, and ideally, audio outputs beyond just a single stereo pair. Multiple outputs let you route different parts to different monitors, which is a huge help for mixing.
Build Quality
Plastic cases are common at this price point, but check for flimsy knobs or a keyboard action that feels cheap. A module that falls apart on stage isn't a good deal, no matter how good it sounds.
User Interface
A confusing menu system can be a nightmare, especially during a live gig. Look for a layout that's intuitive and easy to navigate, or at least one that's well-documented online.
Buying guide
Alright, so you're looking for a sound module without breaking the bank? Been there. Getting a decent keyboard voice without dropping a grand is totally doable, but you gotta know what to look for. We're talking about getting something that'll sound decent in a band rehearsal, won't make your home recording sound like a tin can, and maybe even cut through a live mix - all under $500.
At this price, you're making trade-offs. Don't expect boutique-level sounds or a lightning-fast, weighted keybed. You'll likely be sacrificing some nuance in the sounds and the build will be noticeably less robust.
Prioritize sound quality and polyphony - those are the features that will actually make a difference in your playing. Don't get hung up on fancy effects unless they're genuinely usable.
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 66 sound 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 realistically get vintage Rhodes sounds under $500?
You can get something that resembles a Rhodes, but don't expect the real deal. Many modules offer Rhodes-inspired patches, but the nuance and complexity of a true Rhodes is hard to replicate without serious money.
What about weighted keys? Are there any options?
Finding a module with weighted keys under $500 is tough. You're looking at compromises - either a lighter action or a less realistic feel. Most at this price range will be synth-action or semi-weighted.
Is USB audio a must-have?
It's incredibly convenient for direct recording into your DAW, but not strictly essential. If your interface has MIDI capabilities, you can still record the MIDI data and use the module's sounds separately.
How much polyphony do I really need?
32 voices is a good starting point, but if you're layering a lot of sounds or playing complex arrangements, 64 voices or more will give you more breathing room and prevent frustrating MIDI dropouts.
What's the deal with aftertouch?
Aftertouch is a luxury at this price. Don't expect it. It's a nice-to-have, but not a deal-breaker, and you can compensate with careful programming and expression pedal use.
