Boss SY-200 Synthesizer Pedal

Plug into the SY-200 to create analog-flavored synth tones with your guitar. This pedal offers over 170 sounds with 128 memory locations for quick recall.

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Boss SY-300 Guitar Synthesizer Pedal

No longer available at zZounds
Kick on this pedal to turn your guitar into a fat polyphonic synth. The SY-300 doesn't require a special pickup to be installed -- just plug in and play!

Grab your favorite axe and dive into an extraordinary world of sound creation with the SY-300 Guitar Synthesizer. The Boss SY-300 can be used with all your guitars right away, with no special pickup required -- just plug into the standard 1/4-inch jack and play! Thanks to revolutionary BOSS technology, you're able to explore fat, analog-style polyphonic synth sounds with zero latency, seamlessly extending the natural expressiveness and familiar feel of your own instrument. In addition, you can shape your normal guitar with the synth's filters, amps, and LFOs to create all sorts of cool sounds never heard before. From unique lead textures to rich, evocative soundscapes, the SY-300 brings untapped dimensions of inspiration and creativity to your music.

Access Expressive New Sounds via a Standard 1/4-Inch Input

With the SY-300, tapping into BOSS' legendary guitar synth technology has never been easier. While Boss' other synth products require a special GK pickup and 13-pin cable to access synth voices, the SY-300 can be used with any guitar via a standard 1/4-inch cable. Powered by ultra-fast DSP and innovations from the BOSS engineering team, the SY-300 performs its amazing synth magic in real time, with no lag whatsoever. This delivers a latency-free playing experience that's a natural extension of your normal guitar, letting you to play freely and organically without altering your technique in any way.

A True Analog-Style Synth for Guitar

The SY-300 features a read more powerful polyphonic synthesis engine with three separate sections, bringing a limitless range of fresh tones to your arsenal. Just like a keyboard player with a classic analog synth, you have complete creative freedom to build sounds with a full palette of synthesis parameters--select different wave shapes, tweak them with filter, amp, and pitch controls, modulate them with LFOs, and layer oscillators for rich, complex tones. There's even a step sequencer (with tap tempo control) for creating dynamic melodies and arpeggios simply by playing a single note on your guitar! And with the cool Blender function, you can instantly mix and match synth settings from other patches to discover inspiring new sounds with no heavy lifting at all.

Shape Your Normal Guitar Sound with Synth Parameters

Beyond its amazing synth voices, the SY-300's synth engine can be used to process your normal guitar sound in many compelling ways. Apply filtering to alter the basic tonality, and use the amplifier parameters to alter the attack and decay characteristics. After that, add some sweeping movement to the sound with the LFO section. With these powerful controls, you're able to extend your regular axe with an endless supply of unique creative textures, from subtle to otherworldly.

Maximize Tones with High-Impact Effects

Effects play a huge role in synthesizer sound design, and the SY-300 is filled with options to take your tones into the stratosphere. Four simultaneous effects engines are available, each packing a number of effects types including overdrives and distortions, Slow Gear, Isolator, Slicer, and many others. Some types can even perform two effects at once, such as chorus and delay or delay and reverb. Use the effects to process synth sounds, your straight guitar sound, or both at once--it's up to you.

Powerful Control Options and Versatile Connectivity

Controlling the SY-300 while performing is simple. Using the four built-in footswitches, you can bypass the synth sound, scroll through patches, and control three different parameters of your choosing per patch. Two external footswitches or an expression pedal can also be connected for even more real-time control if needed. The Thru output lets you to send your dry guitar sound directly to your pedals or amp, or it can be used along with the Return jack as an effects loop. Dual output pairs (Main and Sub) offer assignable signal routing options to integrate with any setup, while MIDI In and Out/Thru jacks are provided for interfacing with switchers, drum machines, and other MIDI gear.

USB Interface for Computers

The SY-300 is equipped a USB audio interface to capture audio tracks directly into music production software on your computer. You can record the SY-300's synth and effects sounds, or just monitor them while recording a dry signal. Then, feed that signal back into the SY-300 to "re-synth" the sound and create the perfect tone for your mix. You can feed other tracks from your DAW into the SY-300 as well, processing them with the synth engine and effects to create cool new sounds for your productions. The SY-300's USB connection also allows you to build and organize patches with the dedicated BOSS Tone Studio editor and download new patches from the BOSS Tone Central website.


- Plug into the standard 1/4-inch jack and play rich and expressive polyphonic synth tones with any guitar
- Completely latency-free playing feel directly connects your hands with the sound
- Three simultaneous synth sections and four effects processors enable rich, dynamic, and diverse sound creation
- Shape your normal guitar tone with synth filters, amplifiers, and LFOs to create all-new sounds
- Graphic LCD display, three assignable footswitches, and dedicated on/off footswitch
- 70 ready-to-play preset patches and 99 user patches for storing custom sounds
- Create and archive sounds on your computer with the BOSS Tone Studio editor/librarian and download new sounds at BOSS Tone Central
- Works with bass and other electronic instruments as well
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- Effects: Effect (FX) x 4
- Patch Memories:
- - User: 99
- - Preset: 70
- AD Conversion: 24 bits + AF method
- DA Conversion: 24 bits
- Sampling Rate: 44.1 kHz
- -Nominal Input Level:
- - INPUT: -10 dBu
- - RETURN: -10 dBu
- -Input Impedance:
- - INPUT: 2.2 M ohms
- - RETURN: 220 k ohms
- Nominal Output Level:
- - MAIN OUTPUT: -10 dBu
- - SUB OUTPUT: -10 dBu
- Output Impedance:
- - MAIN OUTPUT: 2 k ohms
- - SUB OUTPUT: 2 k ohms
- Recommended Load Impedance:
- - MAIN OUTPUT L/R: 20 k ohms or greater
- - SUB OUTPUT L/R: 20 k ohms or greater
- - PHONES: 16 ohms or greater
- LCD: Graphic LCD (132 x 64 dots, backlit LCD )
- Connectors:
- - INPUT jack: 1/4-inch phone type
- - THRU jack: 1/4-inch phone type
- - RETURN jack: 1/4-inch phone type
- - MAIN OUTPUT R (MONO) jack: 1/4-inch phone type
- - MAIN OUTPUT L (PHONES) jack: 1/4-inch phone type
- - SUB OUTPUT R (MONO) jack: 1/4-inch phone type
- - SUB OUTPUT L jack: 1/4-inch phone type
- - MIDI (IN, OUT/THRU) connectors
- - EXP/CTL4, 5 jack: 1/4-inch TRS phone type
- - USB port: USB type B
- - DC IN jack
- Power Supply: AC adaptor
- Current Draw: 400 mA
- Dimensions: (W x D x H) 10 1/16 x 7 9/16 x 2 13/16" (255 x 191 x 70mm)
- Weight: 3 lbs. 14 oz. (1.75 kg)
- Accessories: AC adaptor, Owner's manual, Leaflet "USING THE UNIT SAFELY"

For support or warranty questions, please contact the manufacturer:
Phone: 323-890-3700

Reviewers gave this product an overall rating of 5 out of 5 stars. (3 ratings)
Submitted December 28, 2016 by Mike M in Fremont, CA

"Mind Blown!"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I'm a 24 year guitar veteran. I use to gig on a semi-pro level and now I am just a hobbiest. I was always against any sort of midi / guitar synth system. Then one day I got a wild hair up my arse and decided to buy the Boss SY-300. This is one of the best purchases I ever made! MIND BLOWN!! I liked this so much that not long after I bought this I ended up getting the Boss GP10 and the Roland GR55 guitar synths. These processors hooked up with head phones.....MIND BLOWN!!!!

Musical Background:

24 years

Musical Style:

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