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Average Price: $776
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$150
$601+
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Based on price data from 3 merchants for "Boss SY-300 Guitar Synthesizer". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Immerse yourself in an extraordinary sonic universe with the Boss SY-300 Guitar Synthesizer. This innovative device is ready for all your guitars - there's no need for a special pickup, just plug in via the regular 1/4-inch jack and let the music begin! The SY-300, thanks to groundbreaking BOSS technology, offers rich, analog-style polyphonic synth sounds with zero latency, perfectly extending your instrument's natural expressiveness and familiar feel.
But this synth pedal isn't just about offering new sounds. It's also a powerful tool for shaping your existing guitar tone. With the SY-300's onboard filters, amps, and LFOs, you can sculpt your sound into something entirely new. Whether you're looking to add unique lead textures or fill your music with evocative soundscapes, the SY-300 is your gateway to untapped dimensions of creativity and inspiration.
Key Features:
- Revolutionary BOSS technology that enables fat, analog-style polyphonic synth sounds with zero latency.
- Usable with all types of guitars, requires no special pickup, just a standard 1/4-inch jack.
- Onboard filters, amps, and LFOs to shape and alter your guitar tone.
- Offers a range of unique sounds - perfect for creating unique lead textures and rich soundscapes.
- No-latency performance, ensuring a seamless playing experience.
Product specs
| Pedal Type | Synth |
| Analog/Digital | Digital |
| Presets | 70 x Factory, 99 x User |
| Inputs | 1 x 1/4", 1 x 1/4" (return) |
| Outputs | 2 x 1/4" (R/mono, L/phones), 2 x 1/4" (sub out), 1 x 1/4" (thru) |
| MIDI I/O | In/Out |
| USB | 1 x Type-B |
| Other I/O | 1 x 1/4" TRS (expression/control 4, 5) |
| Power Source | AC Adapter (included) |
| Power Usage | 400mA |
| Height | 2.75" |
| Width | 10.04" |
| Depth | 7.52" |
| Weight | 3.86 lbs. |
FAQs
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Does the Boss SY-300 Guitar Synthesizer require a special pickup to function?
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No, the Boss SY-300 does not require a special pickup. It connects directly to your guitar's standard 1/4" output, allowing you to use it with any electric guitar without modification.
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What kind of sounds can I create with the Boss SY-300?
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The Boss SY-300 offers a wide range of synth sounds, from classic analog-style tones to complex digital textures, all customizable through its onboard controls and user presets.
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Can the Boss SY-300 Guitar Synthesizer be integrated with other pedals in my setup?
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Yes, the Boss SY-300 can be easily integrated into your pedalboard. It features multiple inputs and outputs, including a send/return loop, allowing seamless connectivity with other effects pedals.
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Is the Boss SY-300 compatible with MIDI devices?
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Yes, the Boss SY-300 features MIDI In and Out ports, enabling integration with other MIDI-compatible devices for expanded control and synchronization possibilities.
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Does the Boss SY-300 come with preset sounds, and can I create my own?
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The Boss SY-300 comes with 70 factory presets and allows you to create and store up to 99 user presets, offering extensive customization for your unique sound preferences.
Videos
ProGuitarShopDemos
Boss SY-300 Guitar Synthesizer
Reviews
PROS
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Zero latency and no aftertouch issues for smooth playability
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Works with any guitar or bass, no modifications needed
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Three fully customizable oscillators for vast sound possibilities
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Built-in multi-effects for each oscillator plus master effects
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Easy to program with clear, concise manual and intuitive design
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Versatile use across instruments, including electric violin and cello
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Offers both preset and deeply programmable synth sounds
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Can eliminate the need for additional keyboard players in studio
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Supports creative experimentation with sounds and effects
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Durable build quality, designed for longevity and reliability
CONS
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Factory patches quality varies, some may sound grainy or weak
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Lacks Attack Decay Sustain Release section for nuanced sound control
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Requires time and effort to fully unlock its potential
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Sound texture might not match traditional analog synths closely
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Boss SY-300 Guitar Synthesizer.
Features and functionality
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The SY-300 can utilize three different synth engines simultaneously, allowing combinations of waveforms and effects for diverse tonal possibilities.
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The SY-300 includes a wide range of built-in effects such as distortion, fuzz, phasers, and tremolo, often replacing separate pedals on a board.
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The SY-300 tracks polyphonically with virtually no latency, using guitar string sounds as oscillator sources for synth waveforms like sine, saw, and triangle.
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Tone of generated waveforms changes slightly with different guitar pickups, revealing variations in harmonics and waveform purity.
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Includes four effects blocks adjustable in the signal chain, providing internal delay and reverb options for enhanced synth sounds.
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Use cases and applications
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The SY-300 simplifies complex live setups by executing multiple commands with a single pedal press, ideal for intricate performances like Incubus covers.
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The SY-300 is favored for both multi-tonal soundscapes and as an advanced effects processor in genres like industrial metalcore.
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Owners suggest experimenting with feeding non-guitar instruments like piano or vocals through the SY-300 for unique sound processing.
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The SY-300 can optimize tracking for bass instead of guitar, with adjustable input sensitivity, broadening its application across instruments.
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User experience
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Some owners find the editing process on the SY-300 overwhelming despite its capabilities, often defaulting to the SY-1 for simplicity.
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Comparisons
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Compared to the SY-1, the SY-300 offers advanced routing options and multi-effects capabilities, which some users prefer over adding external units like the Eventide H9.
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Critic Reviews
5.0 out of 5
Based on 0 Reviews and 13 Ratings
Artist usage
Add artist
Yes. It kind of comes and goes, but when we’re headlining, we definitely bring it out. It’s a really fun pedal, because you can do so much with it. You can write entire intros with it and get a lot of soundscapes out of it. It doesn’t sound like a guitar, you know. We have a lot of fun with it because Kenny’s kind of a hands-on analog guy. He likes to be able to get down and make the signal really unique every night. The show’s pretty consistent, but there are also these little tricks and things. If you’re really listening, you hear something different happening every night.
Visible in this May 18, 2018 Facebook post and this November 17, 2017 Twitter post.
Haino's pedalboard at GIGADISCO 2, 2019. YouTube footage: https://www.youtube.com/watch?v=AYOhR0Xt3uo
“The best thing about this invention is that you don’t need one of those Roland Hex pickups. It uses the same technology as the [TC Electronic] PolyTune, picking up each individual string which separates everything – it’s polyphonic, like the [Electro-Harmonix] POG2."
In the Dawsons Music interview, Vedran Mircetic mentions using the Boss SY-300 Guitar Synthesizer among his pedal setup.
It can be seen here it is on Alices pedal board - https://www.instagram.com/p/CM9TKFDLOKW/
She also cites it in the following instagram post: "There are so many more sounds in this world still to be made. It's wild to me that you can have an expansive and responsive totally live set up primarily formed of just some old metal strings on a bit of wood. This old piece of gear can send signals to the #bosssy300 they can talk to each other perfectly and without latency, via, velocity and frequency, means this old axe gets to be bilingual and talk with a new synthetic tongue, via the vibes. #oldtechmeetsnewtech #ebow #fenderjazzmaster" https://www.instagram.com/p/CEtSjGbnMbH
In a video posted on his Instagram account, bassist and music producer Robert "Bubby" Lewis is observed utilizing the Boss SY-300 Guitar Synthesizer, as evidenced by him stepping on the pedal. The post is accompanied by a caption that includes a mention of the device and a playful remark, "This ain’t even the half lol🤓 @bossinfoglobal #bubbylewis #sy300", directly attributing the use of the Boss SY-300 to Lewis.
Album Usage
The Boss SY-300 Guitar Synthesizer has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Boss SY-300 Guitar Synthesizer, it is most commonly used with the following gear.
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