Boss SY-300 Polyphonic Guitar Synthesizer

Product ID: 106134

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  • Plug 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
  • Enhance your guitar tone with synth filters, amplifiers, and LFOs to create all-new sounds
  • 70 ready-to-play preset patches and 99 user patches for storing custom sounds
  • Create, load and archive sounds on your computer with the BOSS Tone Studio editor and librarian
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Delivery & Returns

Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight and Channel Islands is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland* FREE on orders over £75 £4.45 on orders under £75 1-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands £12.95 – any order value up to 30kg Over 30kg - please call 1-3 working days
Overseas Please call for details Please call

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You love your guitar, you love how it feels and the sound you get when rocking out on stage or at home, but sometimes you want to push the boundaries and expand the amount of sounds you have at your fingertips. The Boss SY-300 polyphonic guitar synthesizer is here to let you tap into a collection of over 160 preset, editable synth sounds and powerful effects, all with zero latency so that you get the best playing experience possible.

Full palette synthesis

With the Boss SY-300 polyphonic guitar synth, you have the power and creative freedom to build up your own sounds from scratch using wave shapes and tweaking them with filter types, amp and pitch control. Layer oscillators for rich, complex tones and modulate with LFO’s, the sounds you can achieve with the SY-300 will definitely make your keyboard player jealous.

A built in step sequencer complete with tap tempo control lets you create instant melodic lines or if you’re feeling more adventurous, use the built in arpeggiator to create complex melodies with a single note on your guitar. The built in cool Blender function even lets you instantly mix and match synth settings from other patches to invent new sounds instantly.

Powerful effects section

To add some inspirational polish to your sound, the Boss SY-300 comes complete with 4 simultaneous effects engines. Each of these dedicated engines contains a large number of effects such as overdrives and distortions, Slow Gear, Isolator, Slicer, and much much more. This powerful arsenal of effects can be used on the synth engine, for your pure guitar signal or even both at once!

Easy control

Built for performance, the SY-300 gives you plenty of power but without the need for complex controls. 4 built in footswitches let you bypass, scroll and control parameters with ease so you can concentrate on what’s most important… your performance! There are connectivity options to add another two external footswitches or an expression pedal.

For audio, the SY-300 has input, thru, return and line outs in the form of ¼” jack connectors so no matter what your existing setup comprises of, you will be able to integrate it with ease.

Finally, full MIDI and USB connectivity is present so that you can hook it up to a computer for use with DAW software or for use with the Boss Tone studio to create and download new sounds with ease.

Model NameSY-300 Polyphonic Guitar Synthesiser
Dimensions (H x W x D)70 x 255 x 191 mm
Weight1.75kg (3lbs 4 oz.)
Oscillators Three Oscillator (wave: SIN, SAW, TRI, SQR, PWM, DETUNE SAW, NOISE, INPUT)
Effects Effect (FX) x 4
Patch Memories User: 99
Preset: 70
Effects Reverb x 4
Stereophonic Optimizer: Yes
Damper Resonance: Yes
Dual Layer Functions: Yes
Duo: Yes
AD Conversion 24 bits + AF method
AF method (Adaptive Focus method): This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.
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
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
Nominal Output Level MAIN OUTPUT: -10 dBu
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
Included Accessories AC adapter
Owner's manual

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