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GT-3: Guitar Effects Processor


The GT-3 Guitar Effects Processor takes the professional-quality guitar effects and killer COSM™-based preamp of the flagship GT-5 and places them in a sturdy, compact pedalboard with a surprisingly low price. With 32 onboard effects -- including new Auto Riff, Acoustic effects and a Pickup Simulator--the GT-3 opens the doors to a whole new world of guitar processing power.

  • Floor-based guitar effects processor/preamp with 32 killer effects
  • COSM™ preamp with vintage and modern guitar amp emulations, speaker cabinet and mic simulation
  • New Auto Riff triggers complete musical riffs from a single note
  • New Pickup Simulator produces fat humbucking sounds from a single-coil guitar or vice versa
  • Slicer and Feedbacker effects for interesting rhythmic/sustained sounds
  • Includes 12 analog distortion and overdrive effects
  • New EZ Edit mode for quick effects adjustment with four easy steps
  • New acoustic-electric guitar effects, including Anti-Feedback, Bi-Stereo Chorus (2 x 2), and Acoustic-Electric preamp setting
  • Sturdy, all-metal chassis built to withstand years of rigorous use
  • High-quality 24-bit A/D and 20-bit D/A converters for great sound
  • Note that this product is no longer in production. Similar capabilties can be found in the GT-6 Guitar Effects Processor.


If you have questions about operating your BOSS product, please check our Knowledge Base for answers to the most common questions.

You can also contact our Product Support department by phone or email.

In addition, we have a library of Support Documents that you can download and reference. If Support Documents are available for this product, they will be listed below.

Support Documents

GT-3 User Patch Listing
GT-3 Guitar Effects Processor TurboStart