Boss SY-1 Synthesizer

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Effect Pedal for Electric Guitar & Bass

Allows for latency-free playing of synthesizer sounds with the guitar
Polyphonic sound generation
121 Sounds
Can be connected via a conventional 6.3 mm jack cable
Features leads, pads, organs, basses and more, as well as a variety of sound effects and rhythmic synthesizer patterns
Controls: Type, Variation, Tone, Depth, Effect, Direct
Switch: Guitar/Bass
LED: Effect On
Footswitch: Effect Bypass
Input: 6.3 mm jack
Output: 6.3 mm jack
FX Loop Send & Return: 2 x 6.3 mm jack
EXP/CTL input: 6.3 mm Stereo jack
Power adapter connection: AC adapter, 5.5 x 2.1 mm, negative polarity inside
Power consumption: 85 mA
Powered via 9 V battery or 9 V DC power supply (not included - corresponding power supply available under article no. 409939)
Dimensions (W x D x H): 73 x 129 x 59 mm
Weight: 450g g

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3-Year Thomann Warranty

Available since July 2019

Item number 470029

Sales Unit 1 piece(s)

Effect Types Synthesizer

B-Stock from €203 available

€222

All prices incl. VAT

Sales Rank

in Miscellaneous Guitar Effects

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Boss SY-1 Synthesizer B-Stock
May have slight traces of use

€203

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4.5 / 5

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73 Reviews

Never easier to get synth tones on guitar

ThePilgrim 28.11.2022

Since i heard albums like, "somewhere in time", "seventh son of a seventh son" and "turbo", i was really fascinated by that synth driven futuristic sound. When i discovered that the artists have used guitar synths i tried to find one but they were really pricey. Well, not anymore!! Boss did it again and delivered a guitar synth in a stomp and the best part is that you don't need to have a midi pickup to use it!! It has a vast array of sounds, from leads and pads to bass and sequences!! Furthermore it has an fx loop that expands the sonic experimentation!! It tracks fast and the polyphony is great!! I'd prefer it to have some more options for sculpting the sounds and some presets but at that price and footprint we can't ask for more. Also an expression pedal unlocks even more it's potential. I'd recommend it to anyone who likes synths sounds, or who is after the classic tones from the albums i mentioned or to anyone who wants to experiment with sounds!!

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Synth awesomeness

Fileandar 03.04.2022

Well built, as any other Boss' pedals. Some sounds are great, some are less great but hey, you've got 121 combinations to play with and you will definitely find at least 10 or 20 or more variations that will be great for you for recording or just having fun, and one or more combinations that you may use for playing live to spice your solos or chords. Works great with the single coils too.
Great pedal, would recommend.

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Great fun- but lack of presets could be an issue.

drdolittle 13.05.2020

This is an absolute joy to play around with and definitely opens up new creative avenues!

Pros: Huge range of sounds and the sensitivity, responsiveness and lack of latency are amazing.

Cons: There are no presets and with internal and external dials for each control that adds to a lot of fiddling around.
Also YOU REALLY NEED AN EXPRESSION PEDAL to make the best use of the SY-1. (It works well with my moog pedal).

I briefly contemplated 3 stars for these last issues- but it would not have been a fair score as this unit really is incredible in how it can completely transform your sound in real time! Would definitely recommend.

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Random magic touches of character

Reminiscence 28.04.2025

When watching the reviews, I could hear there were tons of fun sounds I could mess around with. But it isn't until I started playing on it that I realised how incredibly inspiring and versatile this was. You can get an ambient sound, a thicker sound for rock (like slap back delay but even shorter and therefore better, in my opinion), searing lead tones of doom, or self-deprecating cute bubbly sounds to play Spongebob-like songs, etc. When blended with the dry guitar sound, this adds so much character to your guitar line. It's no longer just the bridge pickup or the neck, etc. Every setting feels like a special door into an imaginary world that you might never find again if you don't take a picture of that exact setting. Yet, I prefer not to take any picture, as I believe that the randomness of the sound is also what makes it so magical.

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Boss SY-1 Synthesizer

Effect Pedal for Electric Guitar & Bass

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108 Customer ratings

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73 Reviews

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Boss SY-1 Synthesizer

Effect Pedal for Electric Guitar & Bass

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