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Boss GT-1B Bass Multi-effects Processor

Bass Multi-effects Processor with 24-bit Processing, 32 Seconds of Looping, and 90 Effects
$209.99

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Boss GT-1B Bass Multi-effects Processor
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Your Go-anywhere Tone Solution for Bass

Whether you're performing or recording, the BOSS GT-1B bass multi-effects processor gives you the tools you need to craft a stellar bass tone in any application. Loaded with BOSS's most advanced sound engine, you'll be able to tap into a huge range of amplifier and effects models — and you can always download new pro-created patches for free at BOSS Tone Central. It's fast and easy to tweak presets and create your own patches, and support for battery-powered operation makes it the perfect travel companion. If you play electric bass, the BOSS GT-1B processor was made to be your one-stop tone solution for gigging and recording.

World-class tone tools for bass

Equipped with BOSS's most advanced sound engine, the GT-1B multi-effects processor features a wide range of preamp models and premium effects. It even offers BOSS's MDP (Multi-Dimensional Processing) effects such as limiting and distortion for tone shaping that doesn't sacrifice your instrument's character. Common effects such as EQ and Wah are onboard, plus more exotic flavors such as Harmonist, Bass Synth, Defretter, and more. You'll find a huge array of classic effects, including modulations, delays, reverbs, and even a built-in looper.

Made to be mobile

The rugged GT-1B bass processor is sized to fit snugly in the accessory compartment of your gig bag, making it a complete stage solution that doesn't require multiple trips back to your car. You can power it with the optional AC power supply (sold separately) or with four AA batteries for truly portable operation.

Dedicated controls for fast preset creation

Whether you want to build your own tones from scratch or customize an existing patch for your own style, the BOSS GT-1B makes it simple. Three easily accessible knobs offer dedicated access to effects parameters. And the GT-1B's Easy Select and Easy Edit modes streamline the patch-creation process even further. Right out of the box, the GT-1B comes with 99 wide-ranging presets, plus another 99 blank user slots for your own creations.

BOSS Tone Central and BOSS Tone Studio expand your capabilities

Download free patch collections for your GT-1B from BOSS Tone Central. These patches were crafted by professional bassists and are dialed in and ready to use. They also make great starting points for players who want to craft their own custom sounds. The free BOSS Tone Studio editor/librarian software provides integrated access to all of BOSS Tone Central's patch collections.

Maximum control with a minimal footprint

With just three footswitches, the GT-1B gives you access to extensive functionality including patch selection, a built-in tuner, looper control, and much more. Bassists at Sweetwater appreciate the options for adding additional control too — the dedicated CTL1 switch can be assigned to tap tempo, toggle effects, and other performance-focused controls. And an expression pedal input is available for handling wah, volume pedal, and other control duties.

BOSS GT-1B Bass Multi-effects Processor Features:

  • Bass multi-effects processor with 90 amps and effects
  • BOSS's flagship sound engine, fine-tuned for bass guitar
  • Includes MDP (Multi-Dimensional Processing) effects
  • Covers everything from common effects such as EQ, chorus, and delay to harmonizers, bass synth, defretter, and more
  • Compact size can fit easily in a gig bag's accessory pocket
  • Includes 99 pro-created presets, with more available for free from BOSS Tone Central
  • Crafting presets is fast and simple thanks to Easy Select and Easy Edit functions
  • Truly portable operation from 4 AA batteries (optional AC adapter available, not included)
  • Flexible control options with assignable control switch and inputs for external switches/expression pedal
  • 24-bit converters and BOSS's proprietary Adaptive Focus method offer excellent sound quality

Warranty Info

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Tech Specs

  • Pedal Type: Bass Multi-FX
  • Number of Effects: 90
  • Effects Types: Octave, Phaser, Flanger, Tremolo, Chorus, Parametric EQ, Graphic EQ, Wah, Compressor, Overdrive, Delay, Reverb and more
  • Amp Modeling: Preamp models
  • Looper: 32 seconds
  • Inputs: 1 x 1/4" (instrument), 1 x 1/8" (aux in)
  • Outputs: 2 x 1/4", 1 x 1/8" (headphones)
  • USB: 1 x Type B
  • Other I/O: 1 x 1/4" (control 2/3, expression)
  • Software: Boss Editor software, Patch downloads
  • Power Source: 9V DC power supply (sold separately)
  • Power Usage: 200mA
  • Batteries: 4 x AA
  • Height: 2.9"
  • Width: 12.06"
  • Depth: 6.0"
  • Weight: 2 lbs. 14 oz.
  • Manufacturer Part Number: GT-1B

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Customer Reviews

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Rated 5/5

Amazing Pedal

This pedal is perfect for the bass guitar. Sounds amazing and works seamlessly. Perfect for recording, performing, and more. I would definitely recommend for any bass guitar player
Rated 5/5

SO MUCH TO CHOOSE FROM!!

The GT1B is amazing! I can't believe the sounds it creates! I have made my original songs so much better and more interesting with this pedal!

100% satisfied, and so easy to use!

This BOSS pedal is just that! BOSS!!!

Thanks again Sam!
Rated 5/5

Boss Bass Pedal is Fantastic

This bass pedal does it all. From adding fun effects to recording. And the price doesn't break the bank. Well worth it.
Rated 5/5

New to bass but not new to everything else involved in playing in a band? Get it!

If you are new to playing bass in a band, but your primary has always been guitar, this is the pedal for you. It has everything you need to familiarize yourself with different playing styles. It has plenty of room to grow with you as a bassist without having to get more pedals... Oh shoot, you gotta play the iconic bass line of the Ghost Busters theme at a Halloween bash!? No biggy! This things got a synth mod in it! Need a warm tone for the 500th time you play "Can't You See"? It has it!
Music background: Multi-Instrumentalist and songwriter.
Rated 5/5

Great board and a great deal from Sweetwater!

I mostly play jazz these days so I am usually running clean with no effects. But I would like to have the option, and I never wanted to spend a ton of money. Ironically, I ended up wasting a lot more money on cheap, crappy individual pedals that were noisy or just plain bad, and that I ended up never using!

After watching some YouTube videos about the GT-1B, I decided to give it a try, and Sweetwater gave me a great deal on a "demo" unit. (The site listed it in "fair" condition, but it looked absolutely brand new to me! The only flaw was a crease in the cover of the owner's manual!)

This pedal is almost TOO MUCH of a good thing. It has every imaginable standard effect built in, easy to use tools for customizing the sound and the signal chain, and a ton of space to store your presets. My only criticism isn't with the pedal board itself at all… it's the mediocre computer software for programming it. The Mac version doesn't work AT ALL on my M1 MacBook Pro. Luckily I have an old Mac mini at my desk running Windows, because I had to use that to get the software running. (It's built in Adobe Air apparently, which is no longer supported and just straight-up doesn't seem to run on Apple Silicon Macs.)

Well, if bad computer software was a reason to give musical gear a bad review, I'd never give any product a good review! These companies never put adequate resources into their software development and ongoing support, and it's a shame since so much of this hardware depends on it these days. But the GT-1B is an exception in that regard… you don't HAVE to use the computer software at all to get your full use out of it.

So yeah, this thing sounds great and is easy to use. It's also really sturdy and super-compact, so yes, it does fit easily in the side pouch of a gig bag, even the notoriously small one in my Fender tweed gig bag! If you're a bassist looking for a simple, inexpensive, and excellent all-in-one effects rig, THIS IS IT.
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