• Pro-Audio Gear: Preamps, Compressors, Equalizers, DI Boxes, 500 Series, Summing


One of the most popular D.I. boxes of all time, the all-tube REDDI is an industry standard.


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The Finest DI on the Market - Unbelievable Tube Tone

The number of A-Designs REDDI's in use on stages and studios all over the world is nothing short of staggering. Quite simply, there just is no better sounding way to convert an instrument or line level signal to XLR.  

Designed with the help of  top studio engineers and bass players, REDDI has been widely praised by engineers and bassists all over the world as the  best-sounding DI solution on the market today.    

It is important to note that the REDDI is not a high-gain device! Its gain structure has been painstakingly engineered to avoid the slightest compromise in sound quality. Inspired by the glorious sound of the Ampeg B-15 tube bass amp, REDDI’s 6N1-P  tube-driven amplifier feeds signal directly into a hefty custom output transformer by Cinemag – a key component to providing  a harmonically rich tone.  

REDDI’S extremely wide frequency range (20Hz to 60kHz) prevents in-band phase shift, resulting  in outstanding detail and realism. Another major benefit of its wide bandwidth is the prevention of LF phase shift by maintaining a linear response extending below the audible bass range, insuring a full, natural sound.

REDDI’S distinctive bright red steel chassis sports a front-panel Neutrik XLR/1/4” combo input jack, balanced XLR output,  and a 1/4” thru-put, for sending signal to a bass amp – not only useful for live applications, but also for simultaneously recording direct and miked amp tracks in the studio.

A 0-16dB-level control and a bright blue LED power indicator complete  the front panel controls.  On the back panel are heavy-duty toggle switches for power and ground lift, along with the IEC  power outlet.

The REDDI’s all-tube circuitry will enhance the character of any electrified instrument run through it – not just bass! Plug the pickup of an acoustic guitar through REDDI to add depth and fullness to its tone.  Capture and improve all the richness and  life of an electric piano or analog synthesizer.  Warm up sterile sounding digital keyboards or drum machines by strapping a  REDDI across their output – or two, for stereo!  

The uses are literally endless… ….but don’t just take our word for it.  Here are a few comments from some of the people who actually use it:


“The sound of the REDDI all-tube direct box on my bass and guitars is dramatic. When people come in and listen, they just go “WOW what’s that? What did you do to get that sound?” “It not only delivers on bass and keys, but just out and out kills on acoustic guitars with pickups. It puts something on the sound that makes them jump and be present in the mix without that “electric-type” sound.”

Ted Perlman, Grammy Award-winning producer, engineer, musician (Bob Dylan, Chicago, Elton John, Burt Bacharach).


“Now, the REDDI is my favorite DI and definitely my go-to on bass.”

Dylan Dresdow (Black Eyed Peas), Grammy Award nominee, TEC Award nominee, engineer.


“If it needs to be really clean, then I’ll just use the REDDI.”

Viktor Krauss, bassist for Lyle Lovett


“I didn’t use an amp at all. I used only the REDDI and it sounded really, really nice.”

Justin Meldal-Johnsen, bassist with Beck


“The New REDDI DI from A Designs kicks ass…"

Ross Hogarth, Grammy Award-winning producer, engineer, mixer


The best part – not only does it sound fabulous, look really cool and is built like a tank….REDDI is amazingly affordable!   Check one out at your next live gig or recording session – but don’t be surprised when you start wanting more than one...

Only $950.00



All-tube direct box with custom output transformer.
Ultra wide frequency range (20Hz-60kHz).
Neutrik input connector, balanced XLR out, and 1/4'' thru jack
Inspired by the Ampeg B-15.
Clean and airy high end, warmth, transparency, and ultra high-quality sound.
Level control.
Ground lift.
Ultra bright blue LED on/off lamp.
Zero-feedback loop design.
Massive, custom-wound transformers.
6N1P tube
Low-Z, transformer-balanced output.
Frequency Response 20Hz - 60kHz
Input impedance: 1M ohm
Gain range: 16dB
Noise (EIN): -126dB
Output impedance: 600 ohm
Maximum level: +22dBu
Distortion THD: > .08 @ 1kHz
Power Requirements: 100/120/230VAC - 42W
Dimensions (W x H x D) 3-1/2 - x 3-1/2 - x 14-1/2
Weight 10 lb. (4.54 kg.)