Boss SY-1 Synthesizer Stombox Effects Pedal


Write a Review
$205 .99 205.99
Instant Savings: $94.00
Ships within 1 Business Day from New York
PayPal Credit Buy now. Pay over time. Check out with PayPal and choose PayPal Credit. US customers only. Subject to credit approval. See terms 6 and 12 Month Special Financing Online through Klarna, available at checkout
(No reviews yet) Write a Review


Designed for electric guitar players and bassists, the Boss SY-1 is a pedal intended to give you many classic synth tones in a compact pedal. Thanks to the Type and Variation knobs, you can instantly transform your sound into a classic pad, lead, synth bass, bell organ, or rhythmic synth pattern; 121 different sounds are at your disposal.

Depth and Tone/Rate knobs are on hand to tailor your sound further. Function of the Tone/Rate knob changes depending on the effect you've selected—you can even change pitch on certain notes.

The pedal can easily fit into most stompbox setups. With built-in send and return jacks, the SY-1 lets you blend your other pedals in a parallel chain with the synth effect. You can even use this parallel path to output synth tone to its own, dedicated destination, such as a separate amplifier. Independent Direct/Effect knobs allow you to achieve any desired blend between processed and unprocessed signal.

With a buffered bypass for preserving your signal over long cable runs, the BOSS SY-1 can be powered with a single 9V battery or an AC adapter. A battery is included. An AC adapter is available separately.

Latency-Free, Plug-and-Play

The SY-1 can be used with any guitar or bass and a standard 1/4" cable, providing an easy, plug-and-play experience. Thanks to custom BOSS DSP, the SY-1 offers latency-free performance, letting you to play freely and organically without altering your normal technique.

Enhance Performances with Real-Time Control

The SY-1 offers a numbers of ways to make your synth performances more dynamic and expressive. Pressing and holding the pedal's prominent switch sustains the last-played synth sound, allowing you to jam with your regular guitar tone on a sonic bed of your previous synth playing. You can also connect an external footswitch for tap tempo and octave-shift effects, or plug in an expression pedal for continuous Tone/Rate control.


  • Authentic BOSS polyphonic guitar synth in a compact pedal
  • No special pickup required—play rich, dynamic synth tones with any guitar or bass
  • 121 total sounds (11 types and 11 variations), all ready to play with no programming knowledge needed
  • Includes a wide variety of analog-style synth sounds, from leads, basses, and layered organs to sweeping pads and arpeggiated sequences
  • Latency-free performance 
  • Quickly adjust sounds to taste with Tone/Rate and Depth controls
  • Hold function for playing normal guitar over sustained synth voices
  • Blend synth and normal guitar sounds with independent level controls
  • Parallel send/return loop for easy integration with other pedals on your board 
  • Mode switch optimizes the synth engine for guitar or bass
  • Supports extended control with an external footswitch or expression pedal 

SY-1 Sound Types

  • LEAD 1/2: A wide range of sounds suitable for single-note soloing.
  • PAD: Full tones that work great with chords, from layered pads to synth brass and more.
  • BASS: Fat synth bass sounds, including filtered and sub-octave tones.
  • STR: Classic analog-style strings, including layered voices and sweeping textures.
  • ORGAN: A large selection of organ sounds, including many with rotary-style modulation.
  • BELL: Percussive synth sounds with metallic resonance.
  • SFX 1/2: A variety of synth sound effects, including explosive one-shot sounds, animated pitch/filter voices, and more.
  • SEQ 1/2: Pulsating sounds with rhythmic pitch or filter changes.