Boss GT-1B Bass Effects Processor

Powered by BOSS’s flagship bass engine, the GT-1B delivers a wide range of pro-level amps and effects optimized for bass. Its powerful and versatile design is ideal for all playing styles, from stage to studio and everywhere in between. Compact, rugged, and battery powered, the GT-1B is perfect for players on the move, while the intuitive interface lets you create and tweak sounds with ease. And by connecting to BOSS Tone Central, you can download free pro patches, editing software, and more to elevate your music to the next level.

The GT-1B gives bassists access to a huge selection of amps, effects, and more. The sound engine is tuned specifically for bass, providing high-quality tone with punch, clarity, and natural response. Wide-ranging amp types include vintage classics and modern stacks, plus an acoustic bass simulator and modelers for electric and synth bass tones. There are also many effects optimized for bass, including limiter, graphic EQ, defretter, and more, along with essential BOSS stomps like OD/DS and mod/delay/reverb types.

Designed for players who need powerful tones on the go, the GT-1B features a compact and lightweight design that fits easily in a gig bag. Battery operation gives you the freedom to perform anywhere, while the rugged build ensures long-lasting reliability. The rear panel includes multiple outputs for stage and studio use, plus a USB port for recording and patch editing.

The GT-1B’s intuitive interface makes it easy to create and tweak sounds quickly. Select categories to instantly call up effect groups, then dial in parameters with dedicated knobs. Easy Select and Easy Edit functions streamline patch building, while a convenient panel lock prevents accidental changes during performance. And when you’re ready to dive deeper, use BOSS Tone Studio to explore advanced editing capabilities and save your creations.

The GT-1B features high-performance footswitches for selecting patches, tuner access, looper control, and more. A dedicated expression pedal and toe switch give you dynamic control over effects parameters and volume. Additional control is possible via external footswitches or expression pedals, making the GT-1B a powerful hub for bass performance.

• Premium bass multi-effects processor with advanced BOSS sound engine
• Pro-level amps and effects optimized for bass
• Compact, light, and rugged design with battery or AC operation
• Easy Select and Easy Edit functions for quick sound creation
• Dedicated bass effects such as limiter, defretter, and more
• Looper, tuner, and other essential tools for live performance
• Control assign and expression pedal functions for dynamic performance control
• USB audio/MIDI interface and support for BOSS Tone Studio

• AD Conversion: 24 bits + AF method
• DA Conversion: 24 bits
• Sampling Rate: 44.1 kHz
• Effects: 90 types
• Memory: 99 user, 99 preset
• Phrase Loop: 32 sec (mono), 90 sec (mono, with optional USB memory)
• Tuner: Chromatic, Flat x 3
• Display: Graphic LCD (132 x 32 dots, backlit LCD)
• Nominal Input Level: INPUT: -10 dBu; AUX IN: -10 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: Pedal switch x 2, EXP Pedal, EXP Pedal switch, Up/Down switch, CTL1 switch
• Connectors: INPUT jack, AUX IN jack, OUTPUT (L/MONO, R) jacks, PHONES jack, CTL2,3/EXP2 jack, USB COMPUTER port, DC IN jack
• Power Supply: Alkaline battery (AA, LR6) x 4, AC adaptor (PSA series: sold separately)
• Current Draw: 200 mA
• Expected battery life under continuous use: Alkaline battery: approx. 7 hours
• Expected battery charging time: —
• Dimensions: 305 mm (W) x 152 mm (D) x 56 mm (H)
• Weight (including batteries): 1.3 kg
• Accessories: Owner’s manual, Alkaline battery (AA, LR6) x 4
• Options (sold separately): AC adaptor (PSA series), Footswitch (FS-5U, FS-6, FS-7), Expression pedal (EV-5, FV-500L, FV-500H)
• 0 dBu = 0.775 Vrms