Radial JDIItem ID: JDI
Transformer-equipped Passive DI
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From Our Research Team:
One of the Finest Passive DI's Available Anywhere!The Radial JDI passive direct box is the kind of premium-quality direct tool you need for great sound and rock-solid reliability on stages and studios anywhere. The Radial JDI features a custom-designed Eclipse isolation transformer to give you the best performance possible at all frequencies. This box can handle very high signal levels without distorting, and its passive design helps to eliminate 60-cycle ground loops. Great for everything from passive and active guitars and basses to analog and digital keyboards, the Radial JDI is a dependable, quality performer!
Radial JDI at a Glance:
Custom Eclipse transformer for optimum performance
The JDI's Eclipse transformer is made in a US factory that has decades of experience in transformer production. Radial has spent countless hours testing these new transformers to be 100% sure that they stand up to what you expect from your JDI. Radial's engineers have made sure that the Eclipse transformers perform just as well other name-brand units - you'd be hard pressed to tell the difference in the JDI.
The input panel features a 1/4" instrument input and traditional thru-put. An innovative 'merge' function allows the thru-put to be converted to a second input to allow stereo to mono summing. This is often used to interface stereo sources such as keyboards or CD players in live shows where audio channels may be not always be plentiful. The JDI also sports a -15dB pad to interface with higher output levels.
The JDI's output panel features balanced 600-ohm XLR connector with pin-2 hot following the AES specification. A polarity reverse switch toggles pin-2 and pin-3 to allow the JDI to interface with older non-AES equipment and for creative tinkering. The ground lift switch disconnects the XLR pin-1 ground from the JDI for 100% input-to-output isolation.
Finally, a second -30dB pad may be engaged that, when used in tandem with the -15dB input pad, allows the JDI to be connected in parallel with a speaker. This, for instance, allows the engineer to 'tap' the sound coming from a guitar amplifier speaker 'post distortion' thus adding another creative dimension. This unique function incorporates a speaker emulation filter circuit that rolls off highs and lows to more closely approximate the sound of a 12" driver.
As with all Radial direct box, the Radial JDI is designed for use in abusive environments such as on fast-paced stages of concert touring. An innovative book-end design provides a protective zone around the switches and connectors that makes it practically impossible to damage these components.
The inner skeletal frame features a unique 14-gauge welded I-beam construction that makes it impossible to torque the PC board. Stress on the printed circuit board can introduce intermittent solder joints, which by all accounts is the primary cause of direct box failure.
An innovative full-bottom no-slip rubberized pad works double duty by assuring the J48 won't slip and slide around when placed on an amplifier. The protective pad also ads an element of electrical shock resistance by providing a mechanical shield from guitar amp handles that are often directly coupled to the amp chassis.
Radial JDI Features:
The Radial JDI is a solid choice onstage and in the studio!
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Reviewsbased on 7 reviews
Cleanest AND Warmest I've heard
by Danny Carvalho from Kailua, HII bought this DI for recording a bass with 18 watt active electronics. One day I decided to try it on acoustic (my main instrument), and was completely blown away! The first thing I noticed was the la... read more [+]ck of distortion—distortion that I didn't even notice before was just not there, and the resulting tone was a huge relief to the ears. Notes in dissonant chords now blend together like they're supposed to, rather than clashing with each other. It allowed a layer of dynamics to shine through that was just missing with my LR Baggs Para DI. I actually had to practice with it for a while, because of how sensitive it was to my attack.
January 28, 2013
Music Background: Gigging Musician, Producer
This box also warms up the top end slightly compared to active DI boxes—this is not necessarily bad, but good to keep in mind before buying. If you prefer the extra crispness of active DIs, look elsewhere (the JDV would be the active equivalent to this box). While the JDI doesn't "dull" the sound necessarily, it does soften the 10k+ range a little. The transformer also adds some saturation when driven hard, causing notes with harder attack to "pop," in a way that's almost similar to tube compression. It's a very warm and pleasant sound, that remains clear without the bite of an active DI. There's a very analog feel to this DI which, once I got used to it, completely won me over. I HIGHLY recommend it! close [-]
by en76 from hawaii USAyep love em. warm clean sound.
September 26, 2012
Music Background: hoppyist
Only The Purest
by Charlton from Dallas, TexasSome people believe if they buy a better pre-amp, better studio monitors, or special $200 xlr cables that their sound will be better. Let me tell you, look at your existing signal chain, if you do not... read more [+] have a high quality DI in line, start there. The difference was not just a small difference that only engineers would hear, but not the end user. This difference between this JDI and a $50 DI is astounding. You owe yourself to get one of these, and to all you guitar players out there, carry one of these with you and you will have a perfect sound.
March 12, 2012
Music Background: Live Sound Engineer
I had this guy on an acoustic side by side with an Avalon U5, and the JDI was the clear winner (it may have been the tone setting on the U5, but that was the guitar players call, not mine)
The clarity, dynamic range, and overall fidelity of this DI is worth way more than the price. close [-]
The Radial JDI Box
by Keith Williams from Cool, CaliforniaThis box is without doubt one of the best additions to my Studio to date. I recently recorded a jazz album and had the JDI box running through an unright accoustic bass. The signal was clean and const... read more [+]ant and the bass sounded natural.
December 1, 2011
Music Background: Pro musician (vocalist), recording engineer
I also ran this box with my Kurzweil keyboard, the same result. It a produced clean and constant sound throughout the entire nrecording process.
This is excellent value for the price and if you want to get the job done right, then the JDI box is the one you will need. close [-]
This JDI is an answered prayer to sound guys. Even though it's passive, the Jensen transformer allows for completely transparent level transformation. If you need the best passive DI, get the JDI, or JDIduplex. You'll be glad you did. Also it doesn't hurt that they are built like a tank, literally (but no turret). Another cool uniqueness about the JDI/duplex is that it can be put in parallel with a speaker allowing for capturing the guitar sound after it's been distorted by amp AND speaker! ANOTHER cool function is the JDI's "merge" that allows a stereo device to be merged correctly into mono and sent out the JDI's output. Another cool thing is... ok, I'll stop. Just get one, you'll see! (or hear!)
Mario, Indianapolis, IN
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