Zoom B1 FOUR Bass Effects Processor

The Zoom B1 FOUR takes your low-end to new heights with over 60 effects and amp models, looper and a built-in rhythm section. Plus, access ZOOM Guitar Lab’s additional library of downloadable effects.

    • Product Features:

      B1 FOUR offers over 60 built-in effects
      9 amp models for simulating classic rigs
      Up to 5 effects can be used simultaneously, chained together in any order
      Built-in expression pedal for control over any parameter (B1X FOUR only)
      Looper for recording up to 30 seconds / 64 beats of CD-quality audio
      ZOOM Guitar Lab software for creating, editing and managing effects and patches
      68 built-in rhythm patterns which can be used in conjunction with the Looper
      50 memory locations for storing user-created patches
      Auto Save function for automatic saving of all patch parameters
      PRESELECT function allows silent patch selection while the current patch remains operational
      Onboard chromatic tuner
      Input jack accepts standard mono bass guitar cable (both active and passive instruments supported)
      Auxiliary input jack for connection of personal music players
      Output jack for connection to amp or headphones
      Lightweight and small enough to fit in your gig bag
      Easily integrated into any existing pedal board
      Runs on 4 AA batteries, with alkaline battery life of 18 hours
      USB port for firmware updates, power and connection to ZOOM Guitar Lab
    • Tech Specs:

      Maximum number of simultaneous effect:


      User patches :


      Sampling frequency :

      44.1 kHz

      A/D conversion :

      24-bit, 128× oversampling

      D/A conversion :

      24-bit, 128× oversampling

      Signal processing :



      128x32 dot matrix LCD

      INPUT :

      Standard mono phone jack
      Rated input level: -20 dBu
      Input impedance (line): 470 kΩ

      AUX IN :

      Stereo mini jack
      Rated input level: -10 dBu
      Input impedance (line): 1kΩ


      Standard stereo phone jack (combined line/headphone)
      Maximum output level: Line +2 dBu (10 kΩ or more output impedance)
      Headphones 17 mW + 17 mW (32Ω load)

      Input S/N :

      120 dB

      Noise floor (residual noise) :

      -97 dBu

      Power :

      AC adapter: 9V DC 500mA center negative (ZOOM AD-16)
      4 AA batteries (about 18 hours continuous operation time when using alkaline batteries with the LCD backlight off)

      USB :

      USB MIDI, USB Micro-B
      Power can also be supplied through the USB port.
      When using a cable designed only for power, other USB functions cannot be used.

      External dimensions :

      B1 FOUR
      Height: 156 mm (D) × 130 mm (W) × 42 mm (H)
      Weight: 340 g (excluding batteries)

      B1X FOUR

      Height: 156 mm (D) × 216 mm (W) × 52 mm (H)
      Weight: 610 g (excluding batteries)




      *Note: 0 dBu = 0.775 V

    • System Requirements:

      Visit the Zoom website for up to date system requirements

      ** Please note, system requirements may change. For the most recent system requirements please visit the manufacturer's official product listing **