Pricing and availability

We compare 600+ stores and found this item at 6 stores. Prices updated .

Sweetwater
4.5 (91)
$37.90
Guitar Center
4.5 (15)
$37.90
Amazon
3.9 (28)
Used
Reverb
$37.90 New
$27.00 Used
Thomann
4.1 (354)
$22.40 $22.30 $0.10 · All time low

Average Price: $39

Budget/Beginner

$200

$501+

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Price History

Based on price data from 3 merchants for "Behringer ADI21 V-Tone Acoustic Preamp". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Transform your acoustic-electric guitar's sound with the Behringer ADI21 V-Tone Acoustic Preamp. This compact yet powerful pedal is engineered to breathe life into piezo-equipped instruments, offering a rich, natural tone that mimics the warmth of tube amplifiers. Whether you're aiming for the perfect unplugged sound or need a reliable DI solution for live performances and studio sessions, the ADI21 delivers versatility and precision.

At the heart of the ADI21 is its proprietary microphone/tube emulation circuitry, which infuses your sound with warmth and depth, overcoming the often thin and brittle tonal quality of piezo pickups. The 3-band EQ with sweepable mids provides you with detailed tone-shaping capabilities, allowing you to dial in the perfect sound for any environment, from intimate venues to large stages, while effectively managing feedback.

The intuitive Blend control is a defining feature, empowering you to mix the modeled tone with your guitar's direct output, achieving the ideal balance between natural acoustic sound and enhanced warmth. With dual DI modes, the ADI21 can function as a standard active DI box or a sophisticated amp modeler, giving you flexibility in both live and recording scenarios. Plus, its high input impedance ensures that your signal retains its integrity and dynamics.

Key Features:

  • Proprietary microphone/tube emulation circuitry for natural warmth
  • 3-band EQ with sweepable mids for precise tone shaping
  • Blend control for mixing modeled and direct signals
  • Dual DI modes: Use as a direct recording preamp or active DI box
  • High input impedance for maximum signal integrity
  • Outputs include 1/4" TS and balanced XLR connectors
  • Ground lift switch to eliminate hum and buzz
  • Operates on a 9V battery or DC adapter (not included)

Product specs

Pedal Type Acoustic Amp Modeler
Inputs 1 x 1/4"
Outputs 1 x 1/4"
Power Source 9V DC power supply (sold separately)
Batteries 1 x 9V
Height 5"
Width 3.9"
Depth 2"
Weight 1.01 lbs.

FAQs

What type of power supply does the Behringer ADI21 V-Tone Acoustic Preamp require?

The Behringer ADI21 V-Tone Acoustic Preamp requires a 9V DC power supply, which is sold separately. It can also be powered by one 9V battery.

Can the Behringer ADI21 V-Tone Acoustic Preamp be used with electric guitars?

While the Behringer ADI21 is designed primarily for acoustic guitars with piezo pickups, it can be used with electric guitars, but the tonal results may vary compared to its use with acoustics.

How does the Behringer ADI21 V-Tone Acoustic Preamp enhance acoustic guitar sound?

The ADI21 features a blend control, 3-band EQ with sweepable mids, and tube/microphone modeling to enrich and shape your acoustic guitar's tone, providing a more natural and full-bodied sound.

What outputs are available on the Behringer ADI21 V-Tone Acoustic Preamp?

The Behringer ADI21 offers a 1/4" output for connecting to amplifiers or mixers and an XLR output for direct recording or live sound applications.

Does the Behringer ADI21 V-Tone Acoustic Preamp include a ground lift switch?

Yes, the Behringer ADI21 features a ground lift switch to help eliminate hum and noise in your signal when connecting to other audio equipment.

Thomann's Guitars & Basses

Thomann's Guitars & Basses

Better Amplified Acoustic Guitar Sound on a Budget | Thomann

Video thumbnail for Better Amplified Acoustic Guitar Sound on a Budget | Thomann by Thomann's Guitars & Basses

Better Amplified Acoustic Guitar Sound on a Budget | Thomann

Thomann's Guitars & Basses

Thomann's Guitars & Basses

Video thumbnail for BEHRINGER ADI21: Overview by Behringer

BEHRINGER ADI21: Overview

Behringer

Behringer

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[UNBOX+REVIEW] Behringer's V-TONE ACOUSTIC DRIVER ADI21

Nam Giang

Nam Giang

Video thumbnail for Review: Behringer ADI21 Pre-amp and DI (No Talking) by GuitarStudio

Review: Behringer ADI21 Pre-amp and DI (No Talking)

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GuitarStudio

Video thumbnail for V-TONE ACOUSTIC DRIVER ADI21 by 日本版 オフィシャルMusic Tribe

V-TONE ACOUSTIC DRIVER ADI21

日本版 オフィシャルMusic Tribe

日本版 オフィシャルMusic Tribe

Video thumbnail for Behringer Acoustic ADI 21 Pedal Further Review - Watch BEFORE You Buy! by Ukulele Wales

Behringer Acoustic ADI 21 Pedal Further Review - Watch BEFORE You Buy!

Ukulele Wales

Ukulele Wales

Video thumbnail for Behringer ADI21 V-Tone Acoustic Pedal - Ukulele Demo | As good as the bass version? by Ukulele Wales

Behringer ADI21 V-Tone Acoustic Pedal - Ukulele Demo | As good as the bass version?

Ukulele Wales

Ukulele Wales

Reviews

PROS

  • Significantly improves acoustic guitar tone, eliminating the "piezo quack"

  • Offers detailed tone shaping with three bands and midrange frequency control

  • Functions as both an active preamp and a passive DI box

  • Sturdy construction with a thick plastic body and metallic base

  • Includes an XLR output for direct PA connection

  • Provides a blend knob for microphone simulation

  • Versatile use for both acoustic and bass guitars

  • Affordable option with many features for the price

  • Suitable for both live performances and studio recording

  • Easy to integrate with other pedals for enhanced sound

CONS

  • Flimsy plastic switch prone to breaking

  • Inconvenient battery replacement; cannot use phantom power

  • Requires careful setup to avoid distortion and feedback

  • Not ideal for boosting passive pickups through a PA

  • May be awkward to position without a pedalboard setup

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Behringer ADI21 V-Tone Acoustic Preamp.

Features and functionality

  • The Behringer ADI21 includes EQ, level boost, mid-frequency cut, and an XLR output, making it a versatile DI box for its price range.

    Source
  • The ADI21's input impedance is 4.7 M-ohms, which might be lower than the typical 10 M-ohms required for some piezo pickups.

    Source
  • The ADI21 is effective as a preamp for unbuffered homemade piezo pickups, demonstrating versatility in non-standard setups.

    Source

Use cases and applications

  • It's effective for running a soundboard pickup without an onboard preamp into the PA side of an acoustic amp via the XLR output.

    Source
  • It's been noted that the ADI21 can be used with guitars that have built-in preamps, but may not fully suit all piezo-only setups.

    Source
  • The semi-parametric EQ is beneficial for bass applications, allowing users to effectively roll off the top end for better tonal control.

    Source

User experience

  • Owners note that while it helps with EQ adjustments, it won't significantly improve the inherent quality of a cheap acoustic amp.

    Source
  • Owners find the balanced output particularly useful for connecting directly to a front-of-house mixer.

    Source

Comparisons

  • It's considered a budget-friendly alternative to high-end pedals like the LR Baggs Paracoustic DI, though with lesser build quality.

    Source
  • Some users compare the ADI21's suitability for piezo preamps to other dedicated preamp devices, noting the impedance differences.

    Source

Value and pricing

  • At around £24, it's a cost-effective option for basic tone shaping and DI functions, though some users suggest saving for higher-end models for better sound quality.

    Source

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