AudioFu Chart · October 2026
Best Guitar / Bass Synthesizers for Advanced 2026
The top pick is Boss SY-1000 Guitar Synthesizer ($1,124). 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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The SY-1000 is a powerhouse for guitarists and bassists wanting serious synth capabilities. It’s a complete studio in a pedal, offering incredible sonic flexibility and real-time control. Ideal for progressive players, sound designers, and anyone wanting to push the boundaries of their instrument’s potential.
Pros
- Exceptional tracking across a wide range of playing styles.
- Impressive synthesis engine rivals dedicated hardware synthesizers.
- Comprehensive effects suite pulls directly from the GT-1000’s arsenal.
Cons
- Steep learning curve, requires significant time investment to master.
- Size and weight make it less than ideal for gigging musicians.
63AudioFu
IndexStableno change since Aug 17Aug 17$1,124 now$1,124€999 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 ↗ -
- Weight3.3 kg
The GR-55GK Black is a powerful and surprisingly versatile guitar synthesizer, perfect for players wanting to explore a massive palette of sounds beyond traditional guitar tones. Its modeling capabilities and synth engine offer a lot of creative potential, but a bit of a learning curve to master all the features. A great option for gigging musicians or studio players who want a compact, all-in-one solution.
Pros
- Excellent tracking accuracy, minimizing pitch shift artifacts during complex passages
- Roland's COSM modeling convincingly recreates diverse amp and effect tones
- The extensive sound library offers immediate creative inspiration across genres
Cons
- The interface, while functional, can feel a little convoluted for quick adjustments on the fly
- The built-in speakers are adequate for practice but lack the power for stage performance
62AudioFu
IndexStableno change since Aug 17Aug 17$832 now$832€739 at Thomann · in stockCheck price ↗ -
The GM-800 is a serious step up in guitar synth technology. The ZEN-Core engine and serial GK interface really nail the feel and sound, and the standalone module function is a huge bonus. This is a fantastic choice for players wanting a wide range of synth sounds without needing a full rack of gear.
Pros
- ZEN-Core engine delivers remarkably realistic and diverse synth sounds
- Serial GK interface provides significantly improved tracking compared to older systems
- Standalone synth module functionality expands versatility beyond guitar/bass
Cons
- The graphic LCD is a bit small and can be hard to read in bright light
- The learning curve for the ZEN-Core engine can be steep for beginners
66AudioFu
IndexStableno change since Aug 17Aug 17$698 now$698€620 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 ↗ -
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 ↗ -
Boss GK-5 Divided Guitar Pickup
GK-5 Guitar Synth Pickup Kit 6 · Boss
11 for sale on Reverb3 finishes at Thomann
The GK-5 paired with the G6 is a powerful, albeit complex, system for guitarists wanting serious synth capabilities. It’s ideal for players already invested in the Roland/Boss ecosystem or those seeking a highly responsive, expressive synth guitar setup. The tracking is noticeably improved over previous generations, making it a worthwhile upgrade for serious synth guitar enthusiasts.
Pros
- Excellent tracking accuracy thanks to the GK serial interface.
- G6 processor offers a vast palette of high-quality synth sounds.
- Slim profile pickup integrates seamlessly with existing guitar electronics.
Cons
- Installation can be complex, requiring soldering and setup adjustments.
- System's cost represents a significant investment for most guitarists.
36AudioFu
IndexStableno change since Aug 17Aug 17$483 now$483€429 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 ↗
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
Boss GKC-AD Analog-to-Digital GK ConverterGKC-DA GK Converter · Boss48Stable$190€169$190€169Check ↗
- 12
Fishman Triple Play ExpressFishman47Stable$213€189$213€189Check ↗
- 13
Boss GKC-AD Analog-to-Digital GK ConverterGKC-AD GK Converter · Boss46↑ 6.3%$190€169$190€169Check ↗
- 14
Roland GKC-5Roland37Stable$78€69$78€69Check ↗
- 15
Roland GKC-10Roland37Stable$91€81$91€81Check ↗
- 16
Klowra South Zoo Voice SynthKlowra32Stable$111€99$111€99Check ↗
- 17
Mooer E7 Polyphonic Guitar Synth.Mooer32Stable$111€99$111€99Check ↗
- 18
Digitech DOD MeatboxDigitech32Stable$168€149$168€149Check ↗
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
It's gotta feel natural. A synth that fights your technique is useless. We're looking for responsive tracking, minimal latency, and a comfortable interface that doesn't get in the way of your phrasing - especially crucial for bass players needing tight, articulate low-end thump.
Modulation Options
Beyond basic oscillator shapes, advanced players need LFOs, envelopes, and modulation matrices to sculpt sounds. Can you subtly modulate filter resonance for a breathing effect, or use your expression pedal to warp the waveform? These are the things that separate a gimmick from a truly expressive instrument.
Polyphony & Voicing
A single oscillator and a few presets won't cut it. We need multiple oscillators, filters, effects, and the ability to layer sounds - crucial for creating complex textures and pads. Consider how it handles different voicings and whether it can handle a full band without collapsing.
Tracking Accuracy & Range
Poor tracking makes a synth unplayable. We're assessing how well the synth follows fast passages, wide intervals, and subtle dynamics. A wide tracking range is essential for both guitar and bass - you don't want it to clip or sound muddy.
Integration & Routing
Can it handle MIDI through, external effects, and multiple outputs for routing to a mixer? Advanced players often want to incorporate synths into complex signal chains, so flexibility is paramount. A lack of MIDI control limits its usefulness significantly.
Buying guide
Alright, so you're past the cheesy synth bass lines and want to really integrate a synth into your guitar or bass playing? It's a deep dive, man. We're not talking about just plunking out a simple root note; we're talking about nuanced expression, complex layering, and a truly hybrid sound. This isn't beginner territory - these synths demand chops and a willingness to wrestle with some serious menus.
Don't be fooled by bells and whistles. A synth that looks cool but feels clunky or tracks poorly is a waste of money. Paying extra for a unit with robust tracking, deep modulation options, and solid build quality is worth it - you'll spend less time fighting the gear and more time making music.
Be wary of units that promise a lot but have limited polyphony or a shallow sound palette; those are often compromises that will quickly become frustrating.
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 'glide' or portamento? Is it essential?
It's a vibe thing, really. Subtle glide can add warmth and movement, but too much makes it sound like a cheesy 80s preset. Advanced players will use it tastefully to add character, not as a crutch.
Can I use these synths with my existing amp?
Generally, yes, but be prepared to experiment. Many synths output line-level signals, so you might need a DI box or a preamp to drive your amp properly. Some amps respond surprisingly well to synth tones, others...not so much.
What's the difference between a tracking pedal and a dedicated synth?
Tracking pedals are a more affordable entry point, but they're limited in scope. Dedicated synths offer far more sonic flexibility, modulation options, and typically, better tracking accuracy - but the learning curve is steeper.
I'm a bassist - are these synths playable with a bass?
Absolutely, but bass players need to pay close attention to tracking range. A synth that tracks well for guitar might struggle with the lower frequencies of a bass. Look for units specifically designed with bass tracking in mind.
What's latency, and why should I care?
Latency is the delay between when you play a note and when you hear it. High latency feels sluggish and unresponsive. Good synths have minimal latency, but it's something to consider, especially when playing fast passages or using real-time modulation.
