A1X Four

Multi-Effects Processor with Expression Pedal
The Zoom A1X FOUR is a feature-rich processor built specifically for acoustic instruments, with an added expression pedal for real-time control of effects like volume, wah, pitch, and more.

Over 90 Built-In Effects
Includes all 80+ A1 FOUR effects plus 8 additional expression pedal effects, tailored for acoustic guitar, saxophone, trumpet, violin, harmonica, upright bass, and more.

Expression Pedal for Live Control
Adjust parameters like reverb depth, wah sweep, volume, or delay level on the fly with your foot for dynamic, expressive performances.

Instrument-Specific Processing
Features dedicated effects designed to preserve the natural character of each acoustic instrument while enhancing it with custom-tailored tones.

Acoustic Guitar Modeling
Use IR-based AG Models to replicate the tonal character of legendary guitar body shapes, with full EQ control and pickup type selection.

Custom Effects for Winds & Strings
Saxophone and trumpet wah filters include low-pass filtering for more natural response; violin distortion is designed to retain bow attack while adding edge.

Chain Up to 5 Effects
Build your own custom patches using up to 5 effects at once in any order.

Looper and Rhythms Built-In
Record loops up to 30 seconds and play along with 68 rhythm patterns in various acoustic-friendly styles.

Anti-Feedback Technology
Automatically identifies and reduces problematic frequencies to prevent feedback on stage.

Stomp Mode and Memory Mode
Toggle individual effects in real-time or switch between full patches instantly.

Guitar Lab Integration
Connect to Zoom Guitar Lab via USB to download, edit, and organize effects and patches tailored for acoustic instruments.

Mic Compatibility with MAA-1
The included MAA-1 mic adapter allows connection of dynamic and condenser mics, with phantom power and gain control for mic’d acoustic instruments.

Portable and Versatile Power Options
Operates on 4 AA batteries (up to 18 hours of use) or USB power for flexibility on the go.

Designed for Performance
Larger footprint with onboard pedal (216 mm wide), rugged and lightweight, making it ideal for live and studio use.

General Specifications
Device Type: Multi-Effects Processor for Acoustic Instruments
Model: A1X FOUR
Compatible Instruments: Acoustic Guitar, Saxophone, Trumpet, Violin, Harmonica, Acoustic Bass, and more
Number of Built-In Effects: Over 90
Pedal-Controlled Effects: 8 (Volume, Pitch, Reverb, Delay, Wah, and more)
Maximum Simultaneous Effects: 5
Patch Memory: 50 User Patches
Looper: Yes, up to 30 seconds / 64 beats (CD-quality audio)
Drum Machine: 68 Built-In Rhythm Patterns
Tuner: Onboard Chromatic Tuner (supports standard, open, and drop tunings)
Display: 128 × 32 Dot Matrix LCD
Control Modes: MEMORY Mode, STOMP Mode

Effect Processing
Sampling Frequency: 44.1 kHz
A/D Conversion: 24-bit, 128× Oversampling
D/A Conversion: 24-bit, 128× Oversampling
Signal Processing: 32-bit
IR Modeling: Acoustic Guitar Body Models with Adjustable Parameters (Gain, Bass, Mid, Treble)
Pickup Selector: Piezo / Magnetic with EQ Matching
Anti-Feedback Filter: Built-In
Guitar Lab Software: Supported (Effect and Patch Management via USB)

Instrument-Specific Effects
Saxophone: SaxChorus, LPF-Revoiced Wah for Breath Dynamics
Trumpet: Tp MD70 Preset, Frequency-Tuned Wah
Violin: Vn DIST with High-Frequency Boost and Octave-Shifted Clipping
Harmonica: Hm StevieW and Hm Juke Presets, Bullet Mic (Green Bullet) Simulation
Acoustic Bass: Octave and Piezo Simulation, High/Low Frequency Control

Input/Output
Instrument Input: Standard Mono Phone Jack
Input Level: -20 dBu
Input Impedance: 470 kΩ
Aux Input: Stereo Mini Jack
Aux Input Level: -10 dBu
Aux Input Impedance: 1 kΩ
Output: Standard Stereo Phone Jack (Line/Headphone Combined)
Maximum Line Output Level: +2 dBu (10 kΩ or more output impedance)
Headphone Output: 17 mW + 17 mW (32 Ω Load)
Input Signal-to-Noise Ratio: 120 dB
Residual Noise (Noise Floor): -97 dBu

Power
Power Options:
– 4 AA Batteries (Alkaline, up to 18 hours with LCD backlight off)
– USB Bus Power (USB Micro-B, power-only cable disables data functions)
– Optional AC Adapter: 9V DC 500 mA, Center Negative (ZOOM AD-16)

USB
USB Functions: USB MIDI, Power Supply, Firmware Updates, Guitar Lab Connectivity
USB Connector: USB Micro-B

Dimensions & Weight
External Dimensions: 156 mm (D) × 216 mm (W) × 52 mm (H)
Weight: 610 g (excluding batteries)

Included Accessories
Multi-Effects Processor: A1X FOUR
Mic Adapter: MAA-1
Quick Guide: 1x
Patch List: 1x