BOSS GT-1B Bass Multi Effects Processor





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 (to be available in September 2017)


Sampling Frequency: 44.1 kHzAD
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
• 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.

– Owner’s manual
– 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

Dimensions (W x D x H): 305 x 152 x 74 mm (12-1/16 x 6 x 2-1/4 inches)
Maximum height: 74 mm (2-15/16 inches)
Weight (including battery): 1.3 kg (2 lbs 14 oz)



Boss is a manufacturer of effects pedals for electric guitar and bass guitar. It is a division of the Roland Corporation, a Japanese manufacturer that specializes in musical equipment and accessories. For many years Boss has manufactured a wide range of products related to effects processing for guitars, including "compact" and "twin" effects pedals, multi-effect pedals, electronic tuners and pedal boards. In more recent times, Boss expanded their product range by including digital studios, rhythm machines, samplers and other electronic music equipment. They also are now manufacturing solid-state amplifiers and speaker heads such as the Waza and the Katana. Both feature multi-effects units meant to emulate Boss' classic effects pedals.


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