Zoom A1 FOUR Acoustic Guitar Processor
Maximum number of simultaneous effects5User patches50Sampling frequency44.1 kHzA/D conversion24-bit, 128× oversamplingD/A conversion24-bit, 128× oversamplingSignal processing32-bitDisplay128x32 dot matrix LCDINPUTINPUTStandard mono phone jack Rated input level: -20 dBuInput impedance (line): 470 kΩAUX INStereo mini jack Rated input level: -10 dBuInput impedance (line): 1kΩOUTPUTOUTPUTStandard 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/N120dBNoise floor (residual noise)-97 dBuPowerAC 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)USBUSB 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 dimensionsA1 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-1InputINPUT XLR balanced input (2: hot) Input gain: +3 – +30 dBInput impedance: 10 kΩMaximum input level: +4 dBu+48V phantom powerOutputStandard mono phone jack Nominal output level: −20 dBuMaximum output level: +7 dBuOutput impedance: 1 kΩPower2 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 dimensionsHeight: 177 mm (D) × 23 mm (W) × 25 mm (H) Weight : 70 g (excluding batteries) 0 dBu = 0.775 V
Zoom designs and produces a wide array of recording devices, multi-effects processors, effects pedals, digital mixers, and samplers. Our innovative, cutting-edge technology is trusted world-wide by sound designers, musicians, podcasters, filmmakers, location sound professionals, electronic news gatherers, and pretty much anyone who creates amazing, important things.
Zoom’s corporate culture is a fusion of engineers and artists; a combination of advanced technological skills and the sense and desire to employ them creatively and imaginatively. Our mission is to design, develop and manufacture high-end, and easy-to-use creative tools that allow anyone, from amateur to professional, to more freely express their creative ideas in today’s digitally-driven world.