the A1

Specs
A1 FOUR/A1X FOUR
Maximum number of simultaneous effects
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 dBuInput impedance (line): 470 kΩ
AUX IN
Stereo mini jack Rated input level: -10 dBuInput impedance (line): 1kΩ
OUTPUT
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)
Input S/N
120dB
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
A1 FOUR Height: 156 mm (D) × 130 mm (W) × 42 mm (H)Weight:  340 g (excluding batteries)A1X FOUR   Height:  156 mm (D) × 216 mm (W) × 52 mm (H)Weight:  610 g (excluding batteries)
MAA-1
Input
INPUT XLR balanced input (2: hot) Input gain: +3 – +30 dBInput impedance: 10 kΩMaximum input level: +4 dBu+48V phantom power
Output
Standard mono phone jack Nominal output level: −20 dBuMaximum output level: +7 dBuOutput impedance: 1 kΩ
Power
2 AA batteries Continuous operation time (when phantom current is 3 mA) About 15 hours (using alkaline batteries)
About 15 hours (using nickel metal hydride batteries)
External dimensions
Height:  177 mm (D) × 23 mm (W) × 25 mm (H) Weight : 70 g (excluding batteries)                 0 dBu = 0.775 V