The Zoom B1X FOUR

Specs
General Specifications
Maximum number of simultaneous effect
5
User patches
50
Sampling frequency
44.1 kHz
A/D conversion
24-bit, 128× oversampling
D/A conversion
24-bit, 128× oversampling
Signal processing
32−bit
Display
128x32 dot matrix LCD
INPUT
INPUT
Standard mono phone jack | Rated input level: -20 dB | Input impedance (line): 470 kΩ
AUX IN
Stereo mini jack | Rated input level: -10 dBu | Input impedance (line): 1kΩ
OUTPUT
 
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)
Additional Specifications
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
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
 | 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