STOMP BASE

Guitar & Bass Effects Pedal Database

Back to list
A1 FOUR

ZOOM

A1 FOUR

$129.99Reference price

An acoustic multi-effects processor covering not just acoustic guitar but saxophone, trumpet, violin, harmonica, and upright bass. Its 82 effects include algorithms newly developed for each instrument's acoustic character. Fifteen Acoustic Remodeling presets restore body resonance, and the included MAA-1 mic adapter connects clip-on instrument mics. A 30-second looper and 68 rhythm patterns are also on board.

An acoustic multi that embraces winds and strings

A multi-effects processor for acoustic instruments at large - not just acoustic guitar but saxophone, trumpet, violin, harmonica, and upright bass. Rather than reusing electric-guitar effects, its algorithms are newly developed for each instrument's acoustic behavior.

82 effects designed per instrument

The 82 effects include a wah that follows a saxophonist's breath, a violin-specific distortion that preserves bowing attack, and a chorus voiced for chromatic harmonica. They span corrective 7-band EQ and compression through to bold sound design with detune chorus and auto-wah.

Acoustic Remodeling

Fifteen AG MODEL presets capture each guitar's acoustic signature with IR technology, restoring the body resonance lost through a pickup. Each model offers GAIN, BASS, MID, and TREBLE parameters, with signal processing selectable for piezo or magnetic pickups.

Mic adapter included

The bundled MAA-1 mic adapter supports dynamic mics and phantom-powered condensers alike. With a clip-on mic connected, effects reach wind and other instruments that have no pickup, and a GAIN control trims the input level.

Looper, rhythms, and live features

The 30-second looper syncs with the built-in rhythm machine, and moving the looper ahead of the effects lets you shape sounds while a looped phrase plays. 68 rhythm patterns include cajon and Latin percussion, MEMORY mode with preselect and STOMP mode aid live use, an anti-feedback effect tames howling, and four AA batteries power about 18 hours.

  • 82 effects for guitar, winds, strings, and harmonica
  • Wah, chorus, and EQ tuned per instrument
  • 15 AG MODELs restoring body resonance via IR
  • Included MAA-1 adapter for clip-on mics
  • 30-second looper placeable before the effects
  • 68 rhythm patterns including cajon and Latin percussion

Videos

Specifications

ManufacturerZOOMOpens in a new tab
ProductA1 FOUROpens in a new tab
TypeMulti-effects
FunctionsAcoustic simulator, Equalizer, Wah, Chorus, Distortion, Compressor, Octaver, Looper, Tuner
Release year2019
PowerAC adapter DC9V center-negative, 500mA (ZOOM AD-16) / 4x AA batteries, approx. 18 hours of operation (alkaline, LCD backlight off) / 2x AA batteries, approx. 15 hours of operation at 3mA phantom current (alkaline or NiMH)
DimensionsW130 × H42 × D156 mm
StatusAvailable
Report an error

Last updated:

Related pedals

hunter

Limetone Audio

Equalizer

hunter

pierce

Limetone Audio

Wah

pierce

GX-1B

BOSS

Multi-effects

GX-1B

$229.99Reference price

GX-1

BOSS

Multi-effects

GX-1

$229.99Reference price