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Zoom A2.1u Acoustic Guitar Multi-Effects Pedal/USB Interface

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The rich, detailed tone of an acoustic guitar is created by a delicate triple harmony of strings, neck, and body. But a piezo or magnetic pickup never captures the full body resonance, often resulting in thin sound dominated by the strings. This tendency can't be fully compensated with a conventional preamp equalizer.The A2 series incorporates 24-b...  Click To Read More About This Product

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The rich, detailed tone of an acoustic guitar is created by a delicate triple harmony of strings, neck, and body. But a piezo or magnetic pickup never captures the full body resonance, often resulting in thin sound dominated by the strings. This tendency can't be fully compensated with a conventional preamp equalizer.

The A2 series incorporates 24-bit / 96 kHz sampling and sophisticated sound modeling technology to process the line signal from the pickup, adding a lush body tone and the spatial ambience that is created by mic recording. Even when playing through an amplifier or PA speaker, the resonance of the guitar body is restored, allowing the natural acoustic sound to shine through.

Select optimum characteristics to match pickup and amp model
The GLOBAL module that controls settings for the entire unit combines a pair of parameters called AMP SELECT and PICKUP SELECT.

AMP SELECT: Choose from three settings (combo, bright combo, stack) and eliminate the excessive treble that can ruin the sound when playing an acoustic guitar through an amp.
PICK UP SELECT: Besides piezo and magnetic for acoustic guitars, electric guitar pickup settings such as single-coil and humbucker settings are available, allowing you to use the unit as an acoustic guitar simulator.

Expression pedal adds further versatility to your guitar play
The built-in expression pedal is a great way to control effect parameters in real time. Besides adjusting the volume or the tone of a simulation effect, the pedal can be used for manual detection of feedback frequency, controlling the modulation rate, or adjusting the delay/reverb mix level. The dedicated PEDAL ASSIGN key and status LED indicators make it easy and quick to select the effect to control. Effect on/off switching is also possible by pushing the pedal fully down.

USB port enables computer recording
The USB port allows the unit to function as an audio interface for a computer. Simply connect a USB cable to utilize the high-quality sound of the A2.1u in a computer-based recording system.


40 preset effects for Acoustic Guitar, 40 programmable memory patches
7 effect modules with 45 effect types
Includes guitar and body-style modeling
32-bit processing, 96kHz sampling rate
24-Bit A/D, D/A converters
Ultra wide frequency response: 20Hz “ 40kHz
Built-in drum machine with 40 rhythm variations
Integrated chromatic tuner
Sturdy metal chassis
USB interface
Built-in Expression Pedal
Operates on 4 AA batteries, or the included AC power adapter

Included Accessories
AD-0006D adapter
Steinberg Cubase LE software bundled
Effect Types: 47
Effect Modules: 8
Maximum Simultaneous Effects: 8
Patch Memory: User 40 + Preset 40, Total 80
Sampling Frequency: 96kHz
A/D Conversion: 24-bit, 64 times over-sampling
D/A Conversion: 24-bit, 128 times over-sampling
Input: 1/4" phone jack (Rated input level: -20dBm, Input impedance: 1MÎ)
Output (Line/headphones combined): 1/4" stereo phone jack (Maximum output level: +5dBm, Output load impedance: 10kÎ or higher)
Balanced Output: XLR jack (Input/output gain: 0dB, Output impedance: 200Î/HOT-COLD)
Control Input: Expression pedal, footswitch
USB interface: 16-bit, 32kHz/44.1kHz/48kHz
Display: 2-digit 7-segment LED display, Parameter LED, Pedal assign LED
Power Requirements (not included): AA size (LR6) battery x 4, or AC adaptor DC9V/300mA/ Center minus type (AD-0006 recommended)
Battery Life: 6 hours (with alkaline batteries)
Dimensions (mm): 255(W) x 165(D) x 79(H)
Weight: 1200g (without batteries)
Customer Reviews
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Review Snapshot

by PowerReviews

(based on 2 reviews)

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Reviewed by 2 customers

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(3 of 3 customers found this review helpful)


Great pedal for the price!

By Joe Cooke

from Walla Walla, WA

I did a lot of research before I bought this pedal, mainly to augment the sound of my Epiphone PR5, which I subsequently sold. Although my Alvarez already sounded great through our Bose L1, the Zoom A2.1U added incredible new dimensions to our sound, and I've even been running my Gretsch 5120 through it with great results (although I now have my eye on a separate pedal for the Gretsch and the Zoom b2.1U for our bass guitars. I love all the effects possible, although I only use a few of them. I've been able to pick and choose and modify my own voices and models. It's easy to use, the tuner works great, and I love the fact that it's a DI box as well, since we do a lot of gigs where we plug into a large PA system that is already set up. Most of the variations that I use are subtly different, maybe just a different model of guitar, or a slight flanger effect, or a tiny bit of reverb for some blues guitar. It's easy to operate, easy to set up, highly portable and so far seems rugged enough to handle a steady stream of gigs. The drum machine is nice for practice but I'd never use it for a gig, not that it's awful or anything, it's just a personal bias against backing tracks and loops. I'd say about 90% or more of the functionality is unused, but the 10% or less that I do use is well worth the money I spent. We often wonder how we got along without it! The expression pedal is not great, but adequate. I mostly use it to pad out the guitar while I swap from one to another, and sometimes (much to the dismay of my band members) I will use it for a bit of wah-wah. There's a bit of ambient noise sometimes, especially if I add reverb or other effects, but I notice it more than anyone else. Overall, a great pedal for the price!

(1 of 1 customers found this review helpful)


Great Pre-Amp

By Michael Barden

from Gorham, ME

Hi, there! Just picked this up. After doing some serious research regarding an effects processor for acoustic guitar, I came across this unit. I haven't explored all the options yet, because I really just got it, but I did need to take advantage of the pre-amp 'cause the 12-string acoustic I have doesn't have one. Other pre-amps I've used didn't perform very well, but both my playing partner and I agree that the guitar has never sounded better. Can't wait to use some of the other effects! Definitely would recommend this pedal... Seems quite affordable, too!

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