AudioFu Chart · October 2026
Best Guitar / Bass Synthesizers for Professional 2026
The top pick is Boss SY-1000 Guitar Synthesizer ($1,290). Electro Harmonix KEY9 Electric Piano Machine gives you the most for the money at $241. Ranked by the AudioFu Index from 18 models across 8 brands, prices checked every night.
Last updated: October 19, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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Boss SY-1000 Guitar Synthesizer
SY-1000 Guitar Synth Bundle · Boss
28 for sale on Reverb2 finishes at Thomann
- Weight3.7 kg
The SY-1000 is a powerhouse synth pedal, bringing a level of sophistication and control previously reserved for rack units. It’s perfect for players wanting to explore expansive sound design and intricate synth textures, especially those already familiar with BOSS's legacy. Expect a steep learning curve, but the payoff is immense for dedicated soundscapers.
Pros
- Exceptional tracking across all string combinations, a significant leap forward.
- Dynamic Synth accurately responds to playing dynamics, adds expressive control.
- Comprehensive synth engine with familiar BOSS/Roland legacy sounds and new models.
Cons
- Complex interface demands considerable time investment to master fully.
- Size and weight make it less than ideal for smaller pedalboards or gigging frequently.
47AudioFu
IndexStableno change since Aug 17Aug 17$1,290 now$1,290€1,146 at Thomann · in stockCheck price ↗ -
Boss GM-800 Guitar Synthesizer
GM-800 Guitar Synth. Bundle · Boss
39 for sale on Reverb2 finishes at Thomann
The GM-800 is a serious step up for guitar synth players. The improved tracking and the massive sound library powered by the ZEN-Core engine make it incredibly capable for everything from synth leads to layered textures. It’s perfect for players wanting a versatile, high-performance synth experience without needing a full rack setup.
Pros
- ZEN-Core engine delivers incredible sonic versatility, far beyond previous Boss synths
- Serial GK interface offers significantly improved tracking and natural feel compared to older systems
- Standalone synth module expands utility for studio and live performance scenarios
Cons
- The learning curve for ZEN-Core can be steep for those unfamiliar with Roland's engine
- The graphic LCD display, while functional, feels a bit dated compared to modern interfaces
39AudioFu
IndexStableno change since Aug 17Aug 17$937 now$937€833 at Thomann · in stockCheck price ↗ -
- Weight3.3 kg
The GR-55S Black Bundle is a powerhouse for guitarists and bassists wanting to explore synth textures. It's a fantastic all-in-one solution for stage and studio, providing a huge sonic palette with the familiar feel of a guitar. Ideal for players who want to expand their sonic horizons without needing a rack full of gear.
Pros
- Excellent tracking accuracy, especially for bass and lower guitar registers
- VG-99 modelling chain provides a remarkably wide range of amp and effect tones
- Intuitive interface and layout simplifies complex synth layering and editing
Cons
- Can be a steep learning curve for those unfamiliar with guitar synthesis concepts
- The physical footprint is relatively large, limiting portability for some
37AudioFu
IndexStableno change since Aug 17Aug 17$927 now$927€824 at Thomann · in stockCheck price ↗ -
- Strings12-string
The VG-800 is a serious upgrade for V-guitar enthusiasts. It's a powerful tool for expanding your sonic palette, offering incredible realism and flexibility, especially if you're into layering or creating unique hybrid sounds. This is ideal for studio players and gigging musicians wanting a versatile and expressive synthesized guitar voice.
Pros
- Advanced GK interface offers vastly improved tracking accuracy.
- Dual guitar/bass function expands creative possibilities significantly.
- BOSS Tone Studio software provides comprehensive sound editing and organization.
Cons
- Requires a GK pickup (GK-5 or GK-5B), adding to the overall investment.
- The unit's size and weight can be cumbersome for pedalboard setups.
72AudioFu
Index↓ 1.0%since Aug 17 · lowest so far$689 · Aug 17$682 now$682€606 at Thomann · in stockCheck price ↗ -
The SY-200 is a surprisingly capable synthesizer pedal, offering a huge palette of sounds in a relatively small footprint. It’s a great option for guitarists wanting to explore synth textures without needing a full-blown synth setup – especially those in rock, pop, and electronic music. It's a very accessible entry point into the world of guitar synthesis.
Pros
- Excellent tracking, even with humbuckers, minimizes pitch drift issues.
- Polyphonic capabilities unlock a wide range of synth textures, far beyond monophonic synths.
- Compact size and robust Boss build quality make it stage-ready and durable.
Cons
- Limited preset editing depth compared to dedicated synth workstations.
- Can be CPU-intensive, potentially impacting latency with other effects.
63AudioFu
IndexStableno change since Aug 17Aug 17$338 now$338€300 at Thomann · in stockCheck price ↗ -
Boss GK-5 Divided Guitar Pickup
GK-5 Guitar Synth Pickup · Boss
11 for sale on Reverb3 finishes at Thomann
The GK-5 is a solid upgrade over the older 13-pin system, offering more reliable tracking for synth guitar. It’s a great option for players wanting to expand their sonic palette without major guitar modifications, especially those already invested in a Boss synth. Just be prepared for the need of a specific, and sometimes hard to find, cable.
Pros
- Improved Serial GK interface offers significantly better tracking stability.
- Slim profile minimizes impact on guitar feel and string clearance.
- Robust construction ensures reliable performance under gigging conditions.
Cons
- Requires a dedicated Serial GK cable, adding to the overall cost.
- Tracking, while improved, still isn't perfect for extremely fast passages.
59AudioFu
IndexStableno change since Aug 17Aug 17$262 now$262€233 at Thomann · in stockCheck price ↗ -
Electro Harmonix KEY9 Electric Piano Machine
97 for sale on Reverb1 finish at Thomann
The KEY9 is a surprisingly fun and creative tool for guitarists and keyboard players wanting to explore classic electric piano tones. It's a fantastic way to add vintage vibes to your rig, especially if you're looking for a compact and affordable solution without needing deep editing capabilities. This is ideal for songwriters and gigging musicians seeking a quick and easy way to add a unique sonic texture.
Pros
- Excellent emulation of classic electric pianos, surprisingly nuanced sounds
- Fast tracking handles guitar input with impressive responsiveness
- Compact size makes it pedalboard-friendly and travel-easy
Cons
- Limited preset customization beyond the available sounds
- Build quality feels somewhat plasticky, not as robust as some EHX pedals
62AudioFu
IndexStableno change since Aug 17Aug 17$241 now$241€214 at Thomann · in stockCheck price ↗ -
The Electro Harmonix MEL9 is a clever little box that delivers a surprisingly authentic Mellotron experience in a pedal format. It's a great option for keyboardists, guitarists, or bassists wanting that classic, layered sound without lugging around a giant Mellotron. Perfect for adding vintage textures to modern productions or live performance.
Pros
- Authentic Mellotron vibe without the massive footprint and cost
- Fast tracking avoids pickup compatibility headaches – a huge win
- Independent dry/effect controls allow for subtle blending or full emulation
Cons
- The attack knob can be finicky, requiring precise adjustments
- Sound quality, while convincing, isn't a true vintage Mellotron
60AudioFu
IndexStableno change since Aug 17Aug 17$253 now$253€225 at Thomann · in stockCheck price ↗ -
- Strings6-string
The GK-3B is a solid upgrade over the older GK2B, offering a smaller footprint and improved adjustability. It's a great option for bassists who want to expand their sonic palette and experiment with synth sounds, provided they have a compatible sound module to pair it with – it’s a gateway to a whole new world of tonal possibilities.
Pros
- Compact housing significantly reduces intonation issues compared to the GK2B
- Adjustable inter-magnet spacing accommodates diverse string spacing
- Larger jack socket provides a more secure and reliable connection
Cons
- Tracking can still be susceptible to interference from other electronics
- Requires careful setup to avoid unwanted string noise and artifacts
52AudioFu
IndexStableno change since Aug 17Aug 17$215 now$215€191 at Thomann · in stockCheck price ↗ -
This pedal lets you make real synthesizer sounds straight from your guitar without extra pickups. It handles six voices at once and has a nice color screen that feels familiar to other Meris units. It is a powerful tool for players who want rich tones without buying a whole keyboard.
Pros
- Five distinct synthesizer modes for mono, polyphonic, and dry processing
- Polyphonic pitch recognition works without needing special pickups
- Six fully polyphonic voices play simultaneously in any mode
Cons
- Price of $866 is high compared to basic effect pedals
- No specific power supply details are provided in the text
32AudioFu
IndexStableno change since Aug 17Aug 17$843 now$843€749 at Thomann · in stockCheck price ↗
All 18 guitar / bass synthesizers
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Fishman Triple Play ExpressFishman47Stable$213€189$213€189Check ↗
- 12
Boss GKC-AD Analog-to-Digital GK ConverterGKC-DA GK Converter · Boss48Stable$190€169$190€169Check ↗
- 13
Boss GKC-AD Analog-to-Digital GK ConverterGKC-AD GK Converter · Boss46↑ 6.3%$190€169$190€169Check ↗
- 14
Digitech DOD MeatboxDigitech32Stable$168€149$168€149Check ↗
- 15
Roland GKC-5Roland37Stable$78€69$78€69Check ↗
- 16
Roland GKC-10Roland37Stable$91€81$91€81Check ↗
- 17
Klowra South Zoo Voice SynthKlowra32Stable$111€99$111€99Check ↗
- 18
Mooer E7 Polyphonic Guitar Synth.Mooer32Stable$111€99$111€99Check ↗
Guitar/Bass Synthesizers by the numbers
Measured across all 24 models we track, not a sample.
Median $262 — half of all guitar/bass synthesizers here cost less.
How to choose the best guitar/bass synthesizers
Playability
A synth that fights your playing is useless. We're looking for responsive tracking, minimal latency, and a comfortable feel that doesn't interfere with your natural technique. Poor tracking will result in pitch drift and a frustrating experience, especially when playing fast lines.
Polyphony & Voicing
A single-note brass patch is cool, but a professional needs polyphony for chords and pads. Beyond that, the quality of the internal voices matters - do they have warmth, depth, and a usable range of expression? Cheap synths often have thin, brittle sounds.
Modulation Options
LFOs, envelopes, and filters aren't just for tweaking; they're essential for creating evolving, dynamic sounds. The more control you have over these parameters, the more versatile the synth becomes - vital for layering and sound design.
Integration & Routing
Can the synth integrate seamlessly into your existing rig? MIDI capabilities, expression pedal control, and external audio processing options are critical for professional workflows. A synth that's a pain to route is a liability.
Signal Integrity & Headroom
A synth shouldn't introduce noise or compression that degrades your signal. We're looking for clean signal paths, ample headroom to handle dynamic playing, and a robust build quality that can withstand the rigors of gigging.
Buying guide
Alright, so you're a pro looking to expand your sonic palette with a guitar or bass synth? It's not just about slapping on a cheesy brass patch - a good synth expands your writing, unlocks new textures for recording, and can even add a unique vibe to a live set. But let's be real, most synth pedals out there are toys. We're talking about gear that needs to survive a gig, track cleanly, and inspire creativity, not just generate novelty sounds.
Don't fall for the "easy button" marketing. Guitar/bass synths are complex instruments, and cheaper units often cut corners on tracking algorithms or internal voice quality. Paying more usually gets you better tracking, more nuanced sounds, and more flexible routing options - all of which translate to a more professional result.
Consider your needs carefully: a simple pedal for occasional accents is different from a full-blown synth workstation.
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 24 guitar/bass synthesizers 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 tracking sensitivity? How do I adjust it?
Tracking sensitivity determines how well the synth translates your fretboard movements into pitch. Too low, and it jumps; too high, and it's sluggish. Most synths have an adjustment, but finding the sweet spot depends on your playing style and pickup voicing. Experimentation is key.
Can I use a synth pedal to replace a keyboard?
Not really. While some pedals offer a decent range, they lack the full keyboard range and control of a dedicated synth. Think of them as a complementary tool, not a replacement.
What's the best way to minimize latency?
Latency is the delay between playing a note and hearing the synth sound. Lower your buffer size in your DAW, use a direct output if possible, and consider a synth with a particularly low-latency tracking algorithm. Cable quality also surprisingly makes a difference.
I'm a bassist - are there synths specifically designed for bass?
Absolutely. Bass synths often have optimized tracking for lower frequencies and a wider range of bass-friendly sounds. General-purpose synths work fine, but a dedicated bass synth will usually have a more focused feature set and better low-end response.
My synth sounds 'phasey' when I blend it with my guitar signal. What's going on?
That's a common issue. Try inverting the phase of the synth signal, using a different pickup selector position on your guitar, or EQing the synth to avoid clashing frequencies. Careful mixing is crucial.
