
Anthony Easton
The Zoom A1 Four is a versatile acoustic instrument multi-effects processor designed for a variety of acoustic string and wind instruments. Here are the technical specifications and features:
- 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:
- 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
- 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 port for firmware updates, power, and connection to ZOOM Guitar Lab
- Dimensions and Weight:
- 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)
Features:
- Over 80 built-in effects (A1X FOUR offers over 90 built-in effects)
- Dedicated effects for acoustic guitar, saxophone, trumpet, violin, and
harmonica
- Looper for recording up to 30 seconds / 64 beats of CD-quality audio with
seamless start and end times
- ZOOM Guitar Lab software for creating, editing, and managing effects and
patches
- Onboard chromatic tuner supports all standard guitar tunings, including
open and drop tunings
- 68 built-in rhythm patterns tailored for unplugged styles of music can be
used in combination with the Looper
- Anti-Feedback Filter to detect and cut frequencies that cause potential
feedback
- USB port for firmware updates, power, and connection to ZOOM Guitar Lab
The A1 Four/A1X Four is a powerful and versatile multi-effects processor tailored for acoustic instruments, offering a wide range of effects and features to enhance the performance and creativity of acoustic musicians.
Watch the latest video demos and reviews for the A1 Four from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the Zoom A1 Four from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Brand New
$140.29

Brand New
$129.99

Brand New
$102.60

Brand New
$136.41

Brand New
$141.12

Brand New
$157.52

Brand New
$118

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Check out the latest news and articles from around the pedal world.

Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton