Zoom B1 FOUR B1X FOUR Bass Multi-Effects Pedals

 ? B1 FOUR offers over 60 built-in effects
? B1X FOUR offers over 70 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


Maximum number of simultaneous effects:


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


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


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


Standard stereo phone jack (combined
Maximum output level: Line +2 dBu (10 kO or more output impedance)
Headphones 17 mW + 17 mW (32O load)

Input S/N :

120 dB

Noise floor (residual noise) :

-97 dBu

Power :

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)


Connector: USB2.0 Micro-B

Guitar Lab
Standard: USB 1.1 Full Speed

Supported cable: USB2.0 Micro-B cable
Use cables for data transfer.
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 156 mm (D) × 130 mm (W) × 42 mm (H)
B1X FOUR 156 mm (D) × 216 mm (W) × 52 mm (H)



B1 FOUR 340 g (excluding batteries)
B1X FOUR 610 g (excluding batteries)


* Note: 0 dBu = 0.775 V