AudioFu Chart · October 2026
Best Guitar / Bass Synthesizers 2026
The top pick is Boss VG-800 V-Guitar Processor ($682). Electro Harmonix KEY9 Electric Piano Machine gives you the most for the money at $241. Boss SY-1000 Guitar Synthesizer leads the high end. Ranked by the AudioFu Index from 18 models across 8 brands, prices checked every night.
Last updated: October 19, 2026
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All Guitar/Bass SynthesizersTop 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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- 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 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 ↗ -
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 ↗ -
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 ↗ -
- Weight3.3 kg
The GR-55S Black is a powerhouse for guitarists and bassists wanting a versatile, self-contained synth and modeling solution. It's a fantastic tool for studio work and live performance where you need a wide palette of sounds at your fingertips – perfect for players who want to explore synth textures alongside traditional guitar tones.
Pros
- Excellent COSM modeling engine delivers authentic amp and effects tones
- Flexible dual-synth engine allows layering and creative sound design
- Robust build quality with durable chassis and reliable controls
Cons
- Tracking can occasionally be finicky with complex chord voicings
- The size and weight can be cumbersome for gigging musicians
62AudioFu
IndexStableno change since Aug 17Aug 17$752 now$752€668 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 ↗ -
Boss GK-5 Divided Guitar Pickup
GK-5B Bass Synth Pickup · Boss
11 for sale on Reverb3 finishes at Thomann
The GK-5B is a solid upgrade for players using Boss synth systems, offering better tracking than previous models. It’s a straightforward solution for triggering synth sounds from your bass, but remember it's a pickup *feeding* a synth—the synth itself does the heavy lifting. Ideal for synth bass enthusiasts looking for reliable, professional-grade performance.
Pros
- Serial GK interface offers significantly improved tracking stability compared to older systems.
- Slim profile minimizes impact on string spacing and bridge access on most basses.
- Robust construction; feels solid and well-built for gigging reliability.
Cons
- Requires a dedicated Serial GK cable (BGK-15) for operation, adding to the initial investment.
- Sound quality heavily reliant on the synthesizer unit it's paired with; pickup itself is just a transducer.
59AudioFu
IndexStableno change since Aug 17Aug 17$255 now$255€227 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 ↗ -
Boss GKC-AD Analog-to-Digital GK Converter
GKC-DA GK Converter · Boss
10 for sale on Reverb1 finish at Thomann
This little box is a lifesaver if you're rocking a vintage GK-5 or GM-800 and want to tap into newer Boss synth capabilities like the SY-1000. It's a straightforward solution, though be aware of potential latency. Perfect for players wanting that classic synth bass sound without replacing their older gear.
Pros
- Enables modern synth control with legacy GK pickups.
- Provides a crucial bridge between older and newer Boss systems.
- Instrument input expands versatility beyond synth routing.
Cons
- Limited to Serial GK systems; incompatible with standard GK.
- Adds another power supply dependency to your rig.
48AudioFu
IndexStableno change since Aug 17Aug 17$190 now$190€169 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-AD GK Converter · Boss46↑ 6.3%$190€169$190€169Check ↗
- 13
Roland GKC-5Roland37Stable$78€69$78€69Check ↗
- 14
Roland GKC-10Roland37Stable$91€81$91€81Check ↗
- 15
Klowra South Zoo Voice SynthKlowra32Stable$111€99$111€99Check ↗
- 16
Mooer E7 Polyphonic Guitar Synth.Mooer32Stable$111€99$111€99Check ↗
- 17
Digitech DOD MeatboxDigitech32Stable$168€149$168€149Check ↗
- 18
Meris Enzo X Black Limited Ed.Meris32Stable$843€749$843€749Check ↗
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
Tracking
This is the big one. How accurately does the pedal translate your note changes and bends? Poor tracking sounds robotic and jarring, especially with fast playing or complex chords. A good synth tracks cleanly, even with subtle vibrato.
Voice Architecture & Waveforms
Beyond the basic sawtooth and square waves, look for a pedal with versatility. Filters, LFOs, envelopes - these are the things that let you sculpt a unique sound. A limited selection of waveforms can quickly get stale.
Polyphony vs. Monophony
Monophonic synths are generally better for bass and lead lines, while polyphonic synths can create pads and chords. Consider your primary use case - a gigging bassist needs something different than a studio guitarist.
Expression & Dynamics
Does the pedal respond to your playing dynamics? Can you control the filter cutoff, resonance, or other parameters with your pick attack or volume knob? A synth that ignores your touch is just a preset machine.
MIDI Capabilities
MIDI opens up a world of possibilities - controlling the synth from a keyboard, syncing to a DAW, or using it as a controller for other gear. MIDI implementation can vary widely, so check compatibility before you buy.
Buying guide
So, you want to add a synth voice to your guitar or bass? It's a rabbit hole, that's for sure. From subtle pads to full-on Moog-style leads, a good synth pedal can radically change your sonic palette. But choosing one? It's not just about waveforms; it's about how well it tracks, how it reacts to your playing dynamics, and whether it'll actually cut through a live mix without sounding like a digital mess.
A lot of cheaper synth pedals cut corners on tracking - you'll hear it immediately. Don't be fooled by a ton of waveforms if the core tracking is sloppy. Paying a bit more for a reputable brand with solid tracking and good MIDI implementation is almost always worth it, especially if you plan on gigging.
Look for pedals with a good reputation for stability and reliable performance, because a synth that quits mid-song is a nightmare.
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
Can I use a synth pedal with my acoustic guitar?
It's tricky. Piezo pickups on acoustics often sound harsh and unnatural, which can make the synth voice even more jarring. It can be done with careful EQ and a sympathetic synth voice, but expect to spend time dialing it in.
Do I need a MIDI keyboard to use a guitar synth pedal?
Not necessarily. Many pedals can be controlled with the guitar's volume and expression knobs. However, a MIDI keyboard unlocks the full potential for real-time control and sequencing.
What's the difference between a synth pedal and a modeling amp with synth tones?
Modeling amps emulate synth sounds; a dedicated synth pedal is a synthesizer. The feel and responsiveness will be very different - a synth pedal offers far more authentic control and a wider range of sonic possibilities.
My synth pedal's tracking is awful - is there anything I can do?
Double-check your input signal level. Too hot or too cold can cause tracking issues. Experiment with the pedal's tracking settings, if it has them. Sometimes, a different pickup voicing on your guitar can help.
Are guitar synth pedals hard to program?
It depends on the pedal. Some have straightforward interfaces, while others require a deeper dive into menus. Watch some demo videos and read reviews to get a feel for the learning curve.
