GT-1B

Bass Effects Processor

GT-1B

Flagship Bass Tone in an Ultra-Compact Package

The GT-1B gives bass players a massive range of pro tone-shaping power in a small and robust package. Backed by BOSS’s flagship sound engine, you have full access to a huge selection of bass-optimized amps and effects for stage and studio playing. The streamlined interface lets you dial in sounds fast, while the onboard control switch and expression pedal enable you to adjust multiple effects in real time. And by connecting to BOSS TONE CENTRAL, you can download new patches, editing software, and more. Compact, rugged, and battery powered, the GT-1B is the ultimate mobile tone companion for every bassist.

Flagship Tone Tools for Bass

Equipped with a bass-tuned version of BOSS’s most advanced sound engine, the GT-1B is absolutely packed with top-quality sound tools. A wide range of preamps are available for shaping your core tone, including updated favorites from the GT-10B and two all-new models. Premium MDP effects like limiter and distortion feature advanced BOSS tech to maintain your instrument’s character and response, enabling free-flowing musical expression. Graphic EQ, T-Wah, and other essentials are on hand too, plus impact effects such as Harmonist, Bass Synth, Defretter, and more. There’s also a complete array of mod, delay, and reverb effects, and even a looper for jamming and on-the-fly creativity.

Mobile Powerhouse

The GT-1B is designed for bassists on the move. It’s surprisingly lightweight and compact, making it ideal for tight stage setups and situations where you need to travel light. The rugged modern design is easy to slip in the accessory compartment of a bass bag, with no worries of hard edges causing damage to your instrument. AC or battery power provides flexibility for any performing situation, so you can always take your tone with you everywhere you play.

Sound Creation Made Easy

With the GT-1B’s intuitive interface, it’s simple to build sounds and fine-tune parameters, even if you’re new to multi-effects. Dedicated buttons provide instant editing access to each effect category, which you can adjust straight away via three panel knobs. The buttons also function as on/off switches, and feature status indicators that let you see which categories are enabled at a glance. Easy Select and Easy Edit functions streamline patch creation even more, allowing beginners and pros alike to achieve polished multi-effects sounds with just a few tweaks.

BOSS Tone Central and BOSS Tone Studio

At BOSS Tone Central, you’ll find a wide selection of free patch collections for the GT-1B. Programmed by top bassists, these patches are dialed-in and ready to use, and make great starting points for advanced players who like to create their own custom sounds. The free BOSS Tone Studio software provides a full-featured editor/librarian for the GT-1B, as well as integrated access to all the patch collections at BOSS Tone Central.

Pro Control in a Compact Space

The GT-1B’s three footswitches are smartly designed to provide patch selection, tuner access, looper control, and more in a minimal footprint. The dedicated CTL1 switch is freely assignable to functions like tap tempo, effects on/off, and numerous others, while the expression pedal and toe switch are assignable to volume, wah, pitch shift, and various effects parameters. If you crave even more control, there’s a jack for connecting up to two external footswitches or an expression pedal. And in addition to providing access to BOSS Tone Central and BOSS Tone Studio, the GT-1B’s USB jack lets you record tones directly to your favorite DAW.

Specifications
Sampling Frequency
44.1 kHz
AD Conversion
24 bits + AF method
* AF method (Adaptive Focus method) 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
Effects
90 types
Patches
99 (User) + 99 (Preset)
Phrase Loop
32 sec.
Nominal Input Level
INPUT: -10 dBu, AUX IN: -20 dBu
Maximum Input Level
INPUT: +7 dBu, AUX IN: 0 dBu
Input Impedance
INPUT: 1 M ohm, AUX IN: 27 k ohms
Nominal Output Level
OUTPUT (L/MONO, R): -10 dBu, PHONES: -10 dBu
Output Impedance
OUTPUT (L/MONO, R): 1 k ohm, PHONES: 44 ohms
Recommended Load Impedance
OUTPUT (L/MONO, R): 10 k ohms or greater, PHONES: 44 ohms or greater
Controls
DOWN switch, UP switch CTL1 switch
EASY SELECT button, EASY EDIT button, FX1/LIMITER button, OD/DS button, PREAMP button, FX2/MOD button, DELAY button, REVERB button, MEMORY EDIT button, EXIT button, ENTER button, MENU button
1 knob, 2 knob, 3 knob
Expression pedal
Display
Graphic LCD (132 x 32 dots, backlit LCD)
Connectors
INPUT jack, OUTPUT (L/MONO, R) jacks: 1/4-inch phone type
CTL2, 3/EXP2 jack: 1/4-inch TRS phone type
AUX IN jack: Stereo miniature phone type
USB COMPUTER port: USB type B
DC IN jack
Power Supply
Alkaline battery (AA, LR6) x 4, AC adaptor (sold separately)
Current Draw
200 mA
Expected battery life under continuous use
Alkaline: Approx. 7 hours
* These figures will vary depending on the actual conditions of use.
Accessories
Owner's manual
Leaflet "USING THE UNIT SAFELY"
Alkaline battery (AA, LR6) x 4
Options (sold separately)
AC adaptor: PSA series
Footswitch: FS-5U, FS-5L, FS-6, FS-7
Expression Pedal: FV-500L, FV-500H, EV-30, Roland EV-5
Size and Weight
Width
305 mm
12-1/16 inches
Depth
152 mm
6 inches
Height
56 mm
2-1/4 inches
Maximum height
74 mm
2-15/16 inches
Weight (including battery)
1.3 kg
2 lbs 14 oz
* 0 dBu = 0.775 Vrms

Downloads

Support

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 Owner’s Manuals and Support Documents that you can download and reference.