ZOOM
B2 FOUR
$249.99Reference price
A bass effects and amp emulator carrying DI models and Multi-Layer IR. It recreates six professional-standard direct boxes and dynamically blends three impulse responses with picking strength. Eleven preamps including three ZOOM originals, 11 amp and cabinet models, and 82 bass effects are built in, alongside 250 preset patches tracing bass sound history, a 60-second looper, and a USB audio interface function.
A bass-dedicated amp emulator with DI models and Multi-Layer IR
From direct-box modeling to amps, cabinets, and effects, every stage is purpose-built for bass. Audio circuitry with flat phase response underpins sharp attack and a clear low end.
Six DI MODEL types and bass-optimized circuitry
The DI MODEL function selects among six professional-standard direct boxes - three tube and three solid-state. A bass-optimized audio path and an impedance-switchable input that accepts piezo pickups extend coverage to acoustic basses.
Multi-Layer IR amp modeling
Multi-Layer IR dynamically blends impulse responses captured at LOUD, MEDIUM, and SOFT volumes with picking strength. Eleven amp and cabinet models and 11 preamps, including three ZOOM originals, build bass sounds with real-amp responsiveness.
82 effects and 250 preset patches
82 bass effects, including boutique pedal models, combine in any order up to five at once. 250 preset patches recreate landmark bass sounds from the 1950s to today, with 300 patch memories. Newly developed octaver and bass synth effects are included.
Looper, rhythms, and USB
A 60-second looper syncs with 68 rhythm patterns. The USB audio interface records directly into a DAW, the Handy Guitar Lab app adds effects, and the tuner supports Low-B/Hi-C tunings for extended-range basses.
- DI MODEL function with three tube and three solid-state types
- 11 amps and cabinets on picking-responsive Multi-Layer IR
- 11 preamps including three ZOOM originals
- 82 bass effects with boutique pedal models
- 250 preset patches tracing bass sound history
- Impedance-switchable input for piezo pickups
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Specifications
| Manufacturer | ZOOMOpens in a new tab |
|---|---|
| Product | B2 FOUROpens in a new tab |
| Type | Multi-effects |
| Functions | DI, Amp simulator, Preamp, Octaver, Synthesizer, Looper, Tuner |
| Release year | 2023 |
| Power | AC adapter DC9V center-negative, 500mA (ZOOM AD-16) |
| Dimensions | W249 × H72 × D146 mm |
| Status | Available |
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