Boss GT-1B Bass Multi-FX Pedal


Multi-Effect Pedal for Electric Bass

  • 90 Effect types
  • 32 Seconds Looper
  • About 7 hours of playing on battery
  • 99 Presets
  • 99 User patches
  • 3 Footswitches
  • 1 Expression pedal and 1 additional footswitch / expression pedal input
  • USB port for using an editor, as an audio interface or for re-amping
  • Modern design without sharp edges allows transport in a gigbag
  • Professional sounds and editor for free download on
  • Controls: Edit 1 - 2 - 3
  • Switches: Select - Edit - FX1 / Limiter - OD / DS - Preamp - FX2 / Mod - Delay - Reverb - Mem
  • Edit - Exit - Enter Menu
  • Footswitch: Up - Down - CTL 1
  • Entrance. 6.3 mm jack
  • 2 Mono / stereo outputs. 6.3 mm jack
  • Aux In Stereo. 3.5 mm mini jack
  • Phones. 3.5 mm mini jack
  • CTL2,3 / EXP2. 6.3 mm TRS latch
  • USB port
  • 9 V DC power supply connection (barrel connection 5.5 x 2.1 mm - negative polarity inside)
  • Power supply with 4 AA batteries or a 9 V DC power supply (not included - matching optional: Art. 409939)
  • Dimensions (W x D x H): 305 x 152 x 56 mm
  • Weight: 1300 g
available since July 2017
Item number 416904
sales unit 1 piece(s)
Design Floor Effects Pedal
Tubes No
Amp Modeling Yes
Integrated Effects Yes
Headphone Output Yes
Direct Out Yes
MIDI Connector(s) No
Integrated Expression Pedal Yes
Connections for Pedals or Switches Yes
Aux Input Yes
Integrated Tuner Yes
USB Connection Yes
Incl. Tuner 1
Expression Pedal 1
USB-Port 1
Headphone connection 1
Line Out 1
Digital Output 1
Battery Operation 1
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Excellent product for this price
Juliano_ 21.04.2020
I use this at home with headphones so far. In this aspect, the pre-amp module is perfect and works much better then most pedals I've tested so far.
I have also used it with a 2x10" GK amp. It sounds very nice, especially the clean sound, which is important for me. The clean sound is good and it's so easy to program it on spot that you can actually tune it just before playing some songs. The presets, despite being high on outputs (usually all pedals are), are very well structured, which makes it easy to find nice sounds.
Best feature for me: I load it in a backpack, together with energy supply, cables and so on and it weights in total less than 2 kg. Love it!
I would definitely recommend it if you're looking for a small and easy to carry pedal that can handle small gigs.


Super versatile, ultra portable, pure fun.
KJDaBassBoss 26.09.2020
Let me start by saying that I have only begun to scratch the surface of the GT-1B so my comments will primarily reflect such. I have used this pedal to explore a wide range of sounds that, with the 99 presets alone will have you bouncing around in all sorts of directions musically for countless hours (one year later and I am still in the exploratory phase). I am using it in conjunction with my first bass purchase, a Fender PJ Precision Deluxe Special. From 60s P to 70s R&B to Blues to Reggae, to a host of Synth and distortion sounds and even an Organ replication, this thing can do it all. And with a simple connection to a computer you can access the very user-friendly software and expand or dial-in whatever sound you choose. Not to mention, once you begin the process of creating your own tones (which has a somewhat uphill learning curve) you'll spend months and months and more on your journey to find the sounds that feel most at home to your style(s) of music.
But what makes this pedal so cool are its amazing features. I plug my PC, mobile (for music play-through) and headphones into this thing and can play basically anytime, anywhere (due to the battery option). I would highly recommend you spend the extra few bucks and purchase the Boss AC adapter to avoid any noise distortion from an after-market plug and to not waste money on batteries when playing at home or near an outlet. You can of course also run this pedal to your amp and either play audio out or through your headphones to take your sound pleasure to the next level.
In short, this is a terrific product for home and practice use and several of the settings (but certainly not all) can also be used for professional use. Also, the built-in tuner although criticized by some as jumpy, actually will dial you in perfectly, particularly when working on lining up intonation and octave tuning. This pedal is also rock solid sturdy and again very portable.
If versatility, great sound production and the ability to have fun anytime, anywhere is your thing, then this is the pedal for you. Last thing, you won't find a better place in Europe to purchase your music stuff than Thomann. Service, packaging and shipping are always top flight.
Get this pedal. You will not be disappointed.


Worth it, but check the information before purchasing
TomDKK 10.09.2020
Pedal itself is 10/10 realative to price and etc. However 4 stars instead of 5 cuz who is selling pedal WITHOUT power supply, lol, now need to spend 28 euros to order it... Shame such a big brand does such wired things.


Amazing little pedal
dudi86 26.07.2017
i had the gt10b and i liked it, the only problem was that it was too big and heavy, they sured fixed that with the gt1b, also the sounds are IMO better quality, after you learn how to edit and create effects, you can sell your whole other pedals


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