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Image for GT-100 Guitar Multi-Effects Pedal from SamAsh
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Boss GT-100 Guitar Multi-Effects Pedal

The GT-100 comes fully equipped with mega multi-fx as well as next-generation amp modeling.


(17 reviews)

Discounted Price $499.99 MSRP: Old Price $749.99 Save : $250.00 (33%)
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MSRP: Old Price $749.99 Discounted Price $499.99 Save : $250.00 (33%)
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The long-awaited follow up to the GT-10 has arrived. Meet the BOSS effects flagship, the GT-100, boasting next-generation amp modeling that recreates vintage amps as well as providing new COSM tones that soar into the future. The user interface has been improved with a unique dual-LCD system, and EZ TONE has been enhanced with newly designed AMP CUSTOMIZE and OD/DS CUSTOMIZE features which make finding that perfect sound that much easier. The BOSS GT-100 is a powerhouse processor that spans from classic to futuristic in a friendly, rugged, road-worthy unit.


  • Advanced COSM amps that model vintage amp tones and delivers never-before-heard tones
  • Dual-LCD for simple and intuitive operation with direct access to every parameter
  • Improved EZ Tone TONE feature with graphical TONE GRID for constructing new patches; AMP CUSTOMIZE and OD/DS CUSTOMIZE lets you easily create original amps and overdrive/distortion by customizing their behavior
  • Newly developed ACCEL pedal for simultaneous control of multiple parameters

Advanced COSM Amp: Beyond Vintage
With its next-generation COSM processor, the BOSS GT-100 ushers in a new era of expression and sonic capabilities. Recreating the meticulous details of vintage amps and how they behave, the GT-100 excels in not only cloning classic amps, but provides a new world of unimagined tones as well. The AMP CUSTOMIZE function lets you mutate classic amps beyond reality. Construct completely new, unimagined sounds!

Simple and Intuitive User Interface
The GT-100’s unique dual-LCD and eight-knob user interface provides fast access and intuitive control. There are no menus to navigate; every function is instantly available. The tone-customizing functionality has been improved as well. All patches, amps, and overdrive/distortions can be created from scratch and/or customized with the friendly graphical TONE GRID.

New Tonal Possibilities with the ACCEL Pedal
A new dimension of expression is available with the ACCEL pedal, which enables control of multiple parameters simultaneously, as well as time-variant effects such as FEEDBACKER, S-BEND, TWIST, etc. Experiment with creative combinations of parameters, interacting in real time with the pedal.

New A/B Channel Divide Function
Another notable new feature onboard the BOSS GT-100 is the versatile A/B Channel Divide. Assign different amps and effects to each channel, and divide the signal not only by dynamics, but by frequency as well, with each channel capable of driving its own effects and amps settings. The range of tonal possibilities gets wider, and wilder! Assign smooth, mild lead tones to the mid-to-high pitches, for example, and heavy, cutting tones to the lower notes.

Order your Boss GT-100 Guitar Multi Effect Pedal from Sam Ash Direct today with the security of our 45/60 day return/price protection policy, and be sure to take advantage of our fast, free shipping.

Things You Will Get:

  • GT-100 Effect Pedal
  • AC AdaptorOwner's Manual

Sorry Boss you need to do better!


Built like a tank and has a lot of bells a whistles. I like all the effects except for the distortions, I just couldn't get a smooth distortion sound to save my life. I bought one of these years ago when they first came out and returned it for the same reason, I was hoping that a version 2 would be better. Plenty of ins and outs everything you would want except usable distortions it's going back and I won't purchase Version 3!



2 thumbs up


Great customer service, knowledgeable, friendly sales person. Boss gt100 is everything I expected, happy with my purchase.



Love it


GT100 is awesome. Got me away from Line 6.



Worth every penny


Amazing sounds, easy to program, quick To change different sounds. The looper is a lot of fun

Pauly c

Long Island



I use this with my Tweaker 88 and an Eleven rack I can get anything from super clean to metal. I own many amps and this completes my set up you can get any sound you want from VanHalen to Anthrax it just has so much to offer and the effects are awesome no tracking problems like the early boss gt 8 and gt 6 have . Try it you'll like it .

Mike Hunt


All the effects you need in one unit!


The GT-100 is a one stop shop. Every pedal you will ever want and need is in this amazing unit from Boss. You can easily switch from a killer metal overdrive sound directly to a fast acting delay to a smooth chorus and beyond in just a few pedal punches. Not having to route chords all over the place or adaptors is a HUGE plus as well! It does take some time to program the sounds you need but once you learn how its a breeze! I am a staff reviewer for Sam Ash.


Indianapolis, IN

Easy and Fun


I really like this effects pedal and it is real easy to use. The GT-100 has many effects and with the turn of a nob you can change the effect to fit your needs. Also, the rep answered all my questions and got the order placed and shipped with no problems. I highly recommend this product to anyone who wants to take there music to the next level. This is a real hands on product review from [email protected] Sam Ash Miami.


Miami, FL

We Have Liftoff!!


Tons of sound options. Very usefull at home, in the studio and at the gig. The amp modeling sounds great. From vintage sound to modern tones it has all you need. Does take a little time to master your way around, but once you understand it makes for a great effects pedal. This is a real product review from [email protected] Sam Ash Huntington.



Multi Effects That Don't Quit


This things is packed with so many effects and all are of the same quality that you'd find in their separate effects pedals. I own the bass version of this and never leave home without it! This is a real hands on product review from Big Jim at Sam Ash New Haven.

Big Jim

New Haven, CT

no need for an amp


All the sounds the boss gt100 produces amps and effect pedals are no longer needed. You can line out directly into a pa and with good monitors get any sound tone available. Amp models and effects pedal are built right in.



GT-100 Guitar Multi-Effects Pedal

4.7 17


Series GT
Model GT-100

Boss GT-100 Owner's Manual

Corrections to the GT-100 Owner's Manual

Boss GT-100 Parameters

Boss GT-100 MIDI Implementation

Boss GT-100 Patch/Performance List

Warranty Info:

GT-100 Guitar Multi-Effects Pedal

Effects pedals: 5 years parts, 3 years labor All other products: 1 year parts, 90 days labor

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