BOSS GT-1B Bass Multi Effects Processor

BOSS GT-1B Bass Multi Effects Processor

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BOSS GT-1B Bass Effects Processor 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 BOSS 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 (to be available in September 2017)


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

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)

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
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.

Owner’s manual
Alkaline battery (AA, LR6) x 4

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

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