Pricing and availability
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Average Price: $248
Standard/Professional
$119
$300+
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Budget
Standard
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Price History
Based on price data from 7 merchants for "Radial Engineering JDI Passive Direct Box MK3". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
The Radial Engineering JDI Passive Direct Box MK3 is the ultimate solution for musicians seeking clean, undistorted sound. Engineered with a Jensen transformer, this DI box offers unparalleled signal integrity and noise reduction, making it a staple for both studio recording and live performances. Its passive design means no need for phantom power, eliminating the risk of ground loops and ensuring consistent, high-quality audio. With the ability to handle high-output signals, the JDI MK3 is perfect for active instruments and AC-powered equipment, delivering that coveted warm, vintage tone without the harshness of digital clipping.
Built to withstand the rigors of touring, the JDI MK3 boasts a rugged steel chassis with a unique book-end design that protects its switches and connectors from accidental damage. The non-slip rubberized pad ensures stability on any surface, while the welded I-beam construction prevents internal stress, virtually eliminating the chance of cold solder joints. Whether you're plugging in a bass, guitar, or keyboard, the JDI offers versatile connectivity options, including a merge function for stereo-to-mono summing, making it ideal for any setup.
Key Features:
- 100% passive design with Jensen transformer
- Dual function inputs with merge capability
- XLR output and 1/4" thru connection
- Switchable -15dB and -30dB pads
- Ground lift and polarity reverse switches
- Speaker emulation filter for authentic cab sound
- Durable steel chassis with protective book-end design
- Non-slip bottom pad for stability and isolation
Owner's manual
Radial Engineering JDI Passive Direct Box MK3 User ManualVideos
Reverb
Radial Engineering JDI Passive Direct Box | Reverb Demo Video
Radial Engineering JDI Passive Direct Box | Reverb Demo Video
Reverb
Reviews
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Radial Engineering JDI Passive Direct Box MK3.
Comparisons
Build quality
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The JDI is noted for its robust construction, with users mentioning its durability even when thrown onto concrete.
Source
Use cases and applications
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The JDI can handle +21 dBu without significant distortion, making it suitable for high output instruments like keyboards and active bass guitars.
Source
Critic Reviews
5.0 out of 5
Based on 0 Reviews and 6 Ratings
Artist usage
Add artist
"The Ibanez JSA Acoustic runs into [the Radial JDI]. We use that for the song 'Andalucia'."
In a photo from a BlogSpot entry, Duff McKagan is seen using the Radial Engineering JDI Passive Direct Box MK3 during a Walking Papers performance on October 9, 2014.
In this photo, which shows Sultana's performance at WFUV public radio, two Radial JDI direct boxes can be see on her pedalboard.
“I used my Radial JDI passive DI for both the NS Bass and NS Cello, and I also miked the instruments themselves. It’s a technique I borrowed from engineer Tom Eaton for making my electric instruments sound more acoustic. There are no amps on the record.”
This Radial JDI Jensen Equipped Passive Direct Box MK3 is owned by Deryck Whibley Of Sum 41
From a Premiere guitar Article about George : Guitars Ibanez LGB prototype, Ibanez GB30, Yamaha nylon-string, Cordoba nylon-string Amps Two Fender 1965 Twin Reverb reissues Strings, Picks, and Accessories Thomastik-Infeld George Benson Signature .012s (live) and .014s (studio), Ibanez George Benson mediums picks, Monster Cable, Radial JDI Passive Direct Box
Barry Stock's Radial JDI can be seen at 24:00 in this rig rundown video.
Visible in this photo of Droste's board, as sourced from Kit Rae's Big Muff Pi Page.
Dunlop posted this photo to their official Facebook stating, "This is Chris Chaney's current pedalboard". In the top tight of the photo is the Radial JDI DB.
Carl uses a JDI in his loop station rig as seen from 12.40 onwards.
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Radial Engineering JDI Passive Direct Box MK3, it is most commonly used with the following gear.
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