Boss Boss SY1 Synthesizer FX Pedal

Code: Boss SY1 Synthesizer FX Pedal
  • £178.00
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Boss SY1 Synthesizer FX Pedal

More choice than ever before

Synth pedals don't usually offer you as much as the Boss SY-1. But then, there aren't many pedal makers out there who can cram such a huge range features into a single, compact box. This excellently expressive pedal includes an enormous selection of 121 different synth sounds to choose from. Whether you're after analog synth tones, layered chords, lead arpeggios, or full, organ-like soundscapes - the SY-1 has got you covered. With such an immense amount on offer, you'll never need another synth pedal.

Intuitive, easy-to-use controls

Achieving the perfect synth tone has long been a time-consuming, often complicated process for guitarists. Many pedals on the market require extensive programming to create the right voice for your music, and some even necessitate installing special pickups into your guitar. With the Boss SY-1, that isn't the case. It's been designed with usability in mind, featuring an incredibly simple interface that makes it quick and easy to find your perfect tone. No stressful fiddling. No awkward setup. Just stunning synth sound from the moment you plug in.

The best in performance

Impressive synth effects are nothing if your audience can't hear them properly. So Boss have made sure the SY-1 is capable of delivering the absolute maximum in clarity and performance. With innovative, latency-free operation, you won't have to alter the way you play - the SY-1 will let you play freely and naturally. And every note will be crystal-clear.

That's not all. Every synth sound loaded into the SY-1 is polyphonic, meaning you can use the pedal for both lead notes and rhythmic chord playing. A parallel send and return loop means you can easily use your other pedals alongside the SY-1, delivering even more tonal options. And real-time control, including the "press and hold" function that lets you sustain the last synth note you played, makes on-stage use a breeze. This is the ultimate addition to your pedalboard.


  • 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.


  • Model Name: Boss SY-1 Guitar/Bass Synthesizer Pedal
  • Model Code: SY-1
  • Nominal Input Level: -20 dBu (Input, Return)
  • Input Impedance: 2.2 mOhms (Input, Return)
  • Nominal Output Level: -20 dBu (Output, Send)
  • Output Impedance: 1 kOhms (Output, Send)
  • Recommended Load Impedance: 10 kOhms or Greater
  • Bypass: Buffered Bypass
  • Controls:
    • Pedal Switch
    • GUITAR/BASS Switch
    • TYPE Knob
    • VARIATION Knob
    • TONE Knob
    • DEPTH Knob
    • EFFECT Knob
    • DIRECT Knob
  • Connectors:
    • INPUT Jack (0.25'' Phone Type)
    • OUTPUT Jack (0.25'' Phone Type)
    • SEND Jack (0.25'' Phone Type)
    • RETURN Jack (0.25'' Phone Type)
    • EXP/CTL Jack (Stereo 0.25'' Phone Type)
    • DC IN Jack
  • Indicator: CHECK Indicator (Serves also as battery check indicator)
  • Power Supply: Alkaline Battery (9V, 6LR61)
  • Current Draw: 85 mA
  • Battery Life (Approx): 3 Hours
  • Dimensions: 73mm x 129mm x 59mm
  • Weight: 450g
  • Accessories: Owner's Manual, Leaflet, Alkaline Battery (9V)
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Products which are in stock will be delivered on a next working day service when ordered before 2pm*. This excludes some larger pianos which may require specialist 2 person home installation.  This service usually takes no longer than 14 days to complete.   

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Review Summary - 5 out of 5 based on 5 ratings.
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Some very convincing synth and organ sounds that, if chosen wisely, could fit into any set. I used this pedal on my bass to play in a three piece function band to fill in the sound. It is worth investing some time finding appropriate sounds as there are lots with controls and effect level to adjust. The sounds are very good and the tracking is excellent - far better than my old SYB-3! There are no presets, so you will need to remember/make a note of your settings (if you use more than one), then you're good to go. I played a lengthy 50 song wedding gig with it using IEMs and I can say there is no noise or tone suck and it was quick to adjust my settings. This pedal added a lot to our sound and I'm very pleased with it.

August 8, 2021 | Daniel

great pedal really pleased with it rimmers offered a great price so i went with them again i must say cant fault rimmers i must get over some time to the shop when all this covid ends brian

July 21, 2021 | Brian

Great pedal, small in size but big in sounds

February 22, 2021 | Rui

Amazing pedal.

March 22, 2020 | Alan

I naturally defer to Boss products by reputation (and own 2 superb WAZA Craft pedals), but this pedal should be understood and tested before purchase, as it may delight or disappoint, according to expectation. I found the idea of 11 presets, plus 11 varieties assigned to each preset initially exciting, but on evaluation found that if you don't like a particular preset, then 11 varieties are wasted. Although some sounds impressed and others sounded contrived (being probably too digital), I couldn't get away from the fact that I wanted more control over the sound possibilities. Therefore, the presets work for the ergonomics of the pedal format, but limit your options creatively. In the end its a guitar effect creating non-guitar sounds. The dual concentric controls for balance of dry to wet and the rate/tone and depth adjustments helped, but I found it failed to compliment the other pedals in my chain. Not for me but as expected, it's well engineered and a fair price. Try it for yourself!

January 22, 2020 | John