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Behringer GDI21 Guitar Amp Modeler DI box Pedal

Behringer GDI21 Guitar Amp Modeler DI box Pedal

Behringer GDI21 Guitar Amp Modeler DI box Pedal

Item #70944
(2 Reviews)
List Price: $44.99
You Save: USD$16.00 (36% Off)
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Behringer GDI21

Create the most in-demand tube amp sounds or come up with your own! Our authentic V-TONE modeling technology recreates 3 classic guitar amps, 3 gain modes and 3 mic placements for a total of 27 configurations. It provides a truckload of great amps in a single stomp box—simply choose your favorite sounds with a flick of a switch. We’ve included precise level and drive control plus a musical 2-band EQ for ultimate sound shaping. Use the GDI21 either for direct recording output with a speaker simulation or as a standard active direct injection box in bypass mode. The output is laid out on ¼' TS or balanced, gold-plated XLR connectors. A ground lift switch eliminates typical ground loop problems, and it runs on a 9 V battery or a DC power supply (not included). Go from clean or crunch to super-fat distortion in a matter of seconds.


  • Analog guitar modeling preamp/stompbox with DI recording output
  • This BEHRINGER product has been designed to compete head to head with leading products on the market
  • Authentic V-TONE modeling technology for 3 classic guitar amps, 3 gain modes and 3 mic placements for a total of 27 configurations. Easily achieve the most sought-after tube amp sounds from clean, crunch to super-fat distortion
  • Provides a truckload of great amps in a single stomp box—simply choose your favourite sounds with a flick of a switch
  • Precise level and drive control plus musical 2-band EQ for ultimate sound
  • Dual DI mode for either direct recording output with speaker simulation or standard active direct injection box in bypass mode
  • Output available on ¼' TS or balanced, gold-plated XLR connectors
  • Ground lift switch eliminates typical ground loop problems
  • Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included)
  • High-quality components and exceptionally rugged construction ensure long life
  • Conceived and designed by BEHRINGER Germany
  • Products mentioned herein are exclusively BEHRINGER products and are not in any way associated with and have not been approved, licensed, sponsored, endorsed, designed or manufactured (or anything else for that matter!) by anyone other than BEHRINGER. All Trademarks mentioned belong to their respective owners and are not affiliated with BEHRINGER.
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Behringer GDI21 Reviews
4.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Most won't need more.
Pros: Versatile,Excellent Sound Quality,Responsive,Compact Design,Good Selection Of Effects

The internet has demo videos, use good earphones. There it is, and it does all the sounds most will ever need. However the company ALSO offers the SF300 with even more or the UZ400 with lots more gnarly waveforms. Note that many top professional recording artists use various "digital trickery" equipment for a lot of special sounds, and none of these is one of those. Like everything else, "it is what it is and it ain't what it ain't".
March 28, 2011
over 8 years ago
One correction to original review.
Pros: Excellent Sound Quality,Responsive,Compact Design,Versatile
Cons: Limited Selection Of Effects

Well, GOSH! It took me a long time to notice from the slight indications, that this unit and others varied from it by Behringer, ACTUALLY DO use sampling and digital trickery. The unit seems at first an upgrade from the LM-386 IC homemade buzz-tone units made from Radio Shack parts, many designs listed on the net. You also get some added sustain out of the 386's used this way as well, from the ragged clipping. Those fun little homebrew 386 rigs are pseudo-historic, as Les Paul used a small tube amp grossly overdriven, to make the original buzz-tones, and a small IC amp may be the modern equivalent. The Behringer GDI-21 SEEMS to use a brief sample of a really torqued waveform, repeated, for the one hottest selectable sound. APPEARANTLY the other lesser sounds are made by variously filtering this down, strategically (and inexpensively!) for effect. The slight SEAMS connecting repeated samples together is barely detectable and only at high volume, but it should sound somewhat intentional to non-musicians as added texture. And sustain bordering on the illegal is available. Most will simply fiddle with the knobs until they like a sound for a particular work.
August 14, 2012
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