Pricing and availability

We compare 600+ stores and found this item at 4 stores. Prices updated .

Sweetwater
4.0 (19)
$989.99
Guitar Center
4.0 (8)
$989.99
Reverb
5.0 (29)
$564.83 New
$345.00 Used
Musician's Friend
4.0 (20)
$989.99

Average Price: $776

High-end/Boutique

$150

$601+

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Standard

High-end

Price History

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

Does the Boss SY-300 Guitar Synthesizer require a special pickup to function?

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.

What kind of sounds can I create with the Boss SY-300?

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.

Can the Boss SY-300 Guitar Synthesizer be integrated with other pedals in my setup?

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.

Is the Boss SY-300 compatible with MIDI devices?

Yes, the Boss SY-300 features MIDI In and Out ports, enabling integration with other MIDI-compatible devices for expanded control and synchronization possibilities.

Does the Boss SY-300 come with preset sounds, and can I create my own?

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.

ProGuitarShopDemos

ProGuitarShopDemos

Boss SY-300 Guitar Synthesizer

Video thumbnail for Boss SY-300 Guitar Synthesizer by ProGuitarShopDemos

Boss SY-300 Guitar Synthesizer

ProGuitarShopDemos

ProGuitarShopDemos

Video thumbnail for BOSS SY-300 Guitar Synth Demo by Guitarist

BOSS SY-300 Guitar Synth Demo

Guitarist

Guitarist

Video thumbnail for Unbelieveable Sounds! Boss SY-300 Guitar Synth Pedal Demo at Frankfurt Musikmesse 2015 by StompboxTV

Unbelieveable Sounds! Boss SY-300 Guitar Synth Pedal Demo at Frankfurt Musikmesse 2015

StompboxTV

StompboxTV

Video thumbnail for BOSS SY-300 Guitar Synthesizer Review by Sweetwater by Sweetwater

BOSS SY-300 Guitar Synthesizer Review by Sweetwater

Sweetwater

Sweetwater

Video thumbnail for Boss SY300 Demo - Its Guitar-Synth-Tastic!! by Rob Chapman

Boss SY300 Demo - Its Guitar-Synth-Tastic!!

Rob Chapman

Rob Chapman

Video thumbnail for Ambient Guitar Gear Review - Boss SY-300 Guitar Synthesizer by Chords Of Orion

Ambient Guitar Gear Review - Boss SY-300 Guitar Synthesizer

Chords Of Orion

Chords Of Orion

Video thumbnail for Boss SY-300 Guitar Synthesizer effects pedal demo by MusicRadar

Boss SY-300 Guitar Synthesizer effects pedal demo

MusicRadar

MusicRadar

Video thumbnail for MESSE 2015: BOSS SY-300 Guitar Synthesizer Demo by sonicstate

MESSE 2015: BOSS SY-300 Guitar Synthesizer Demo

sonicstate

sonicstate

Video thumbnail for BOSS SY-300 Guitar Synth Pedal (Musikmesse 2015) by Reidys Home Of Music

BOSS SY-300 Guitar Synth Pedal (Musikmesse 2015)

Reidys Home Of Music

Reidys Home Of Music

Video thumbnail for The First Contact with Boss SY-300 Guitar Synthesizer feat. SynthMania at #TSR19 by Max Solo Music

The First Contact with Boss SY-300 Guitar Synthesizer feat. SynthMania at #TSR19

Max Solo Music

Max Solo Music

Reviews

PROS

  • Zero latency and no aftertouch issues for smooth playability

  • Works with any guitar or bass, no modifications needed

  • Three fully customizable oscillators for vast sound possibilities

  • Built-in multi-effects for each oscillator plus master effects

  • Easy to program with clear, concise manual and intuitive design

  • Versatile use across instruments, including electric violin and cello

  • Offers both preset and deeply programmable synth sounds

  • Can eliminate the need for additional keyboard players in studio

  • Supports creative experimentation with sounds and effects

  • Durable build quality, designed for longevity and reliability

CONS

  • Factory patches quality varies, some may sound grainy or weak

  • Lacks Attack Decay Sustain Release section for nuanced sound control

  • Requires time and effort to fully unlock its potential

  • 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

  • The SY-300 can utilize three different synth engines simultaneously, allowing combinations of waveforms and effects for diverse tonal possibilities.

    Source
  • 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.

    Source
  • The SY-300 tracks polyphonically with virtually no latency, using guitar string sounds as oscillator sources for synth waveforms like sine, saw, and triangle.

    Source
  • Tone of generated waveforms changes slightly with different guitar pickups, revealing variations in harmonics and waveform purity.

    Source
  • Includes four effects blocks adjustable in the signal chain, providing internal delay and reverb options for enhanced synth sounds.

    Source

Use cases and applications

  • The SY-300 simplifies complex live setups by executing multiple commands with a single pedal press, ideal for intricate performances like Incubus covers.

    Source
  • The SY-300 is favored for both multi-tonal soundscapes and as an advanced effects processor in genres like industrial metalcore.

    Source
  • Owners suggest experimenting with feeding non-guitar instruments like piano or vocals through the SY-300 for unique sound processing.

    Source
  • The SY-300 can optimize tracking for bass instead of guitar, with adjustable input sensitivity, broadening its application across instruments.

    Source

User experience

  • Some owners find the editing process on the SY-300 overwhelming despite its capabilities, often defaulting to the SY-1 for simplicity.

    Source

Comparisons

  • 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.

    Source

Software and compatibility

  • MIDI functionality in the SY-300 is limited to control messages only; it can't generate synth waveforms based on MIDI note signals.

    Source

Critic Reviews

Boss SY-300

soundonsound.com

The Boss SY-300 Guitar Synthesizer impresses with its innovative design, allowing guitarists to access polyphonic synth sounds without a hex pickup. It boasts a wide range of analog-style tones and effects, with no perceptible latency, making it user-friendly as a conventional stompbox. The built-in effects are versatile, enhancing its appeal. However, its polyphonic performance isn't as smooth as single-note playing, sometimes producing 'lumpy' sounds. Despite this, it opens new possibilities for guitar synthesis, marking a significant step forward. For those willing to explore its capabilities, the SY-300 offers a rewarding experience.

positive

Boss SY-300 Guitar Synthesizer Review - Premier Guitar

premierguitar.com

The Boss SY-300 Guitar Synthesizer is a standout for its user-friendly interface and impressive tracking sensitivity. It offers organic sounds that defy its digital nature, making it a versatile tool for guitarists eager to explore new sonic landscapes without the need for invasive modifications. While the synth's price tag is steep, its intuitive design and the ability to create unique textures justify the investment. However, a background in synths can help users get the most out of its features. Overall, it's a powerful creative ally for those willing to dive into its depths.

positive

Boss SY-300 Guitar Synthesizer review | MusicRadar

musicradar.com

The Boss SY-300 Guitar Synthesizer is a game-changer for guitarists looking to delve into synthesizer territory without the hassle of special pickups. It offers a plethora of sonic options with its three oscillators and 21 onboard effects. The unit's deep editing capabilities are user-friendly, thanks to its intuitive interface similar to popular multi-effects processors. While its complexity might overwhelm some, the factory presets and randomization feature simplify sound creation. The SY-300 stands out for its excellent tracking and low latency, producing a wide range of sounds from ambient tones to aggressive synth leads. Despite its potential to create over-the-top sounds, it delivers impressive versatility for adventurous players.

positive

5.0 out of 5

Based on 0 Reviews and 13 Ratings

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Artist usage

Add artist
See how Johnny Marr uses Boss SY-300 Guitar Synthesizer

Johnny Marr

Singer, Guitarist

Modest Mouse

...
Verified via Photo

In this post to Johnny's Instagram page, the SY-300 can be seen in the upper-left corner of the image, to the right of the green SL-20 Slicer pedal.

See how Steve Vai uses Boss SY-300 Guitar Synthesizer

Steve Vai

Guitarist

Whitesnake

...
Verified via Roland

Listed on Steve's official Roland page.

See how Rob Chapman uses Boss SY-300 Guitar Synthesizer

Rob Chapman

Singer, Guitarist

Dorje

...
Verified via YouTube

Chapman used this synth in this video.

See how Ben Howard uses Boss SY-300 Guitar Synthesizer

Ben Howard

Singer, Guitarist

A Blaze of Feather

...
Verified via YouTube

You can see it on top his pedalboard on the Towing The Line performance @ Jools Holland

See how Nick Reinhart uses Boss SY-300 Guitar Synthesizer

Nick Reinhart

Singer, Guitarist

Death Grips

...
Verified via Photo

Nick Reinhart showcases the Boss SY-300 Guitar Synthesizer in a post on Instagram, expressing excitement over this new addition to his gear collection.

See how Vernon Reid uses Boss SY-300 Guitar Synthesizer

Vernon Reid

Guitarist

Supergroup B

...
Verified via YouTube

At 19:20 in this video Vernon shows his "brand new" Boss SY-300 synth.

See how James Edward Bagshaw uses Boss SY-300 Guitar Synthesizer

James Edward Bagshaw

Singer, Guitarist

Temples

...
Verified via Photo

"Making some new sounds…"

See how Will Swan uses Boss SY-300 Guitar Synthesizer

Will Swan

Guitarist

Dance Gavin Dance

...
Verified via YouTube

Just too much stuff, man ... an insane amount of stuff. For this record I probably used, like, 20 pedals. But my Boss SY300 synthesizer pedal is amazing. And the Eventide PitchFactor is insane.

The pedal was mentioned in 2021 Premier Guitar interview.

"I love synth pedals," declares Swan. "I'm always looking for a good synth pedal. When I found the SY-300, it blew my mind." He's twisted his guitar signal on the past four DGD records with that big blue Boss box.

See how Sugizo uses Boss SY-300 Guitar Synthesizer

Sugizo

Guitarist, Composer

X Japan

...
Verified via YouTube

At 1:32 in this video, Sugizo's pedalboard is shown to consist of a Boss SY-300 synthesizer pedal.

See how Jim O'Rourke uses Boss SY-300 Guitar Synthesizer

Jim O'Rourke

Singer, Guitarist

Sonic Youth

...
Verified via YouTube

Jim talks about the pedal and patches he has created with it.

See how KT Tunstall uses Boss SY-300 Guitar Synthesizer

KT Tunstall

Singer, Guitarist

7 Worlds Collide

...
Verified via Premierguitar

The guitar synthesizer is also used by Tunstall, but it's off her pedalboard, according to Premier Guitar.

See how Ichirou Agata uses Boss SY-300 Guitar Synthesizer

Ichirou Agata

Guitarist

Melt-Banana

...
Verified via Reddit

Seen on the right-hand board in this 2022 gig photo.

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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