Behringer V-Tone Acoustic ADI21

Analog Modeling PreampNow the coveted "unplugged" sound is super-favorable! You want the naturally warm and present sound of tube amplifiers? The ADI21 is an analog modeling preamp / effect pedal with direct recording output for acoustic guitars.

Its ultra-musical 3-band EQ with tune-able mid-range is ideal for simple feedback suppression and control of hard-sounding piezo pickups. A high input impedance ensures maximum signal repetition and dynamics. You can use the ADI21 either as a direct recording preamp with tubes / microphone simulation or as an active standard DI box. The output is designed as a 6.3 mm mono jack and as a balanced gold-plated XLR connector. A ground lift switch prevents problems with ground loops, the power supply is via a 9 volt battery or a DC adapter (not included).

  • Stompbox with DI recording output for acoustic guitars
  • Authentic tube and microphone modeling circuitry provides the natural warmth and presence, removed by microphone acoustic guitar in conjunction with a tube amp
  • Ultra-musical 3-band EQ with swept mids for accurate feedback control and to eliminate the harsh harmonics of piezo pickups
  • Dual DI mode for either direct recording output with tube / microphone simulation or standard active DI box
  • Outputs on 6.3mm TS or balanced, gold-plated XLR connector
  • Ground Lift switch
  • Runs on 9 V battery or DC adapter (not included)

Further Information

Modelling Yes
Incl. Tuner No
Expression Pedal No
Headphone Output No
USB Connection No
MIDI Interface No
Battery Operation Yes
PSU included No

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Every acoustic guitarist should have one!
Silvio C., 01.07.2015
This small box fits the space between the acoustic guitar and the PA system, providing additional controls and, most important, an XLR output. The thick brown plastic body and the heavy metallic base give a sense of solidity; the on/off button may seem brittle, but this device is not supposed to be repeatedly engaged and disengaged while playing!

The tone (three bands, plus middle frequency) and volume knobs are integrated by two cursors for ground lift and -20dB level reduction. A "blend" knob is also present, which is actually a volume control for a simulated microphone in front of the guitar's soundhole. The device can be powered by either 9V battery (lasting about four hours) or adapter: because of the internal pre-amplifier, powering via XLR is impossible.

When disengaged, the device works as a passive DI box. Engaging it will activate the internal pre-amplifier, and this might reduce the sound level, as the volume knob is thought to both decrease and increase the volume; as the blend knob also increases the volume of the unit, some careful soundcheck may be required. In either case, the sound is absolutely convincing: however, the device must always be powered, even in passive mode. Some users reported feedback problems when blending with the microphone simulator: but I never had this issue.

Overall, a good tool at a low price, which will rest in the guitar case's pocket, ready to spring into action.
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Just buy it - trust me :)
OliverSean, 22.12.2014
For this price I don't see why Behringer is not No.1. The quality of this product and what it can do to your acoustic guitar sound is phenomenal both for live and recordings. My Taylor sounds so much more warm and proper acoustic when plugged in. Gone is the thin brittle piezo sound. Don't get any of the DI's for acoustics that cost 100's of pounds. This magic box gives them all a run for their money - and how!!
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$19.50 €17.65
Plus $33 shipping

The price in USD is a guideline price only!

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