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-class BOSS sound engine specially tuned for bass
Pro-level amps and effects in a light, compact floor unit
Essential tools on board for optimizing your core bass tone
Includes advanced MDP effects for maximum musical expression
Modern design with no hard edges enables safe transport in an instrument bag
Easy Select and Easy Edit functions for quickly choosing and tweaking patches
Four AA batteries provide approximately seven hours of mobile playing time
Onboard control switch and expression pedal; footswitch/expression pedal jack and USB
Download pro patches and editor software for free at BOSS Tone Central
Sampling Frequency44.1 kHz
AD Conversion24 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
Patches99 (User) + 99 (Preset)
Phrase Loop 32 sec
Nominal Input LevelINPUT: -10 dBu,
AUX IN: -20 dBu
Maximum Input LevelINPUT: +7 dBu,
AUX IN: 0 dBuInput Impedance
INPUT: 1 M ohm,
AUX IN: 27 k ohms
Nominal Output LevelOUTPUT (L/MONO, R): -10 dBu, PHONES: -10 dBu
Output ImpedanceOUTPUT (L/MONO, R): 1 k ohm, PHONES: 44 ohms
Recommended Load ImpedanceOUTPUT (L/MONO, R): 10 k ohms or greater, PHONES: 44 ohms or greater
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
DisplayGraphic LCD (132 x 32 dots, backlit LCD)
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 SupplyAlkaline battery (AA, LR6) x 4, AC adaptor (sold separately)
Current Draw200 mA
Expected battery life under continuous useAlkaline: Approx. 7 hours * These figures will vary depending on the actual conditions of use.
AccessoriesOwner'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, Roland EV-5
Size and Weight
Width305 mm 12-1/16 inches
Depth152 mm 6 inches
Height56 mm 2-1/4 inches
Maximum height74 mm 2-15/16 inches
Weight (including battery)1.3 kg 2 lbs 14 oz