Radial JDI Passive Direct Box

Radial

(8 reviews) Write a Review
Product Code: 1814
Holiday 10% Savings
**Unlock Your Holiday Savings** This weekend only, SAVE 10% on this item by using discount code HOLIDAY24 at checkout. Stock is limited and this sale will end Sunday night, so not miss your chance to save today!
$249.99
Adding to cart… The item has been added
In Stock

This item is in stock and will ship the same day if ordered prior to 3pm EST Monday - Friday. Otherwise, it will ship the next business day.

Got Questions? Need Support?

888-228-4530 Contact Us!

The Radial JDI Passive Direct Box ensures the natural tone and harmonic balance is retained, bringing out the very essence of the instrument. Employing a Jensen audio transformer as the engine and being the world's finest direct box, the JDI delivers smooth, musical tones to the preamp.

The Radial JDI is a passive direct box designed to handle extreme signal levels without distortion of any kind. Unlike an active DI that is limited by the buffering amplifier's rail voltage, the Radial JDI employs a Jensen audio transformer as the engine. Jensen transformers are legendary in their ability to gracefully handle transients while delivering a smooth, warm sounding Bessel curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and with virtually zero phase deviation, the Radial JDI delivers the natural, pure sound of the instrument without artifact.

The 100% passive circuitry inside the Radial JDI is incredibly efficient. The transformer performs both high-to-low impedance conversion and signal balancing at the same time with minimal loading and does so without any power whatsoever. The transformer also introduces a magnetic bridge that passes signal while rejecting stray DC voltage. This makes the Radial JDI particularly adept at eliminating hum and buzz caused by ground loops.

Features include input and throughput ¼” connectors, -15dB input pad, ground lift, and 180º degree polarity reverse to help phase align the instrument with the PA. A secondary circuit is added for direct interfacing with high output devices such as guitar or bass amp loudspeakers plus a unique merge function allows stereo sources such as keyboards to be summed mono, saving valuable input channels.

Built tough to handle the abuse of live touring, the Radial JDI features a 14-gauge steel I-beam inner frame and a unique book-end outer shell. The innovative design eliminates stress on the PCB, reducing opportunity for solder joints to go ‘cold' while the outer shell creates a protective zone around the switches and connectors. The steel casing resists noise-causing electromagnetic pollution and the transformer's sensitive inner workings are further protected from magnetic fields with a MuMETAL® can. This ensures the signal transfer is quiet and free from hum.

These combined features have made the Radial JDI the most popular passive direct box in professional touring and an excellent choice for instrument interface in the studio!

Radial JDI Passive Direct Box Features

  • Jensen Transformer equipped passive DI
  • Eliminates hum and buzz from ground loops
  • Virtually zero phase & harmonic distortion
  • Exceptional signal handling and noise rejection
  • Best-sounding passive DI in the world
  • Authentic Jensen Transformer equipped passive DI
  • Linear frequency response from 10Hz ~ 40kHz
  • Extraordinary level handling without distortion
  • Built to survive the road
  • Plug-&-Play Design - Easy-to-use!
  • No battery or phantom-power required
  • Impossible to overload!
  • Up to 8 may be rack-mounted with the J-Rak

Radial JDI Passive Direct Box Specifications

  • Specs:
    • Audio Circuit Type: Passive, transformer based
    • Number of Channels: Single channel (mono)
    • Frequency Response: 20Hz ~ 20KHz (± 0.2dB)
    • Dynamic Range: 135dB
    • Maximum Input: +21dB @ 20Hz ~ 20kHz
    • Total Harmonic Distortion: 0.05% from 20Hz ~ 20kHz @-10dB
    • Phase Deviation: 0.3° @ 100Hz; 3° @ 20Hz
    • Input Impedance: 140k Ohms, unbalanced
    • Output Impedance: 150 Ohms, balanced
  • Features:
    • Transformer: Jensen JT-DBE, 12:1 ratio
    • Shield: Dual Faraday, mu-metal can
    • Input Pad: -15dB
    • Merge: Sums left & right sources to mono
    • 180-degree Polarity Reverse: Inverts absolute phase
    • Ground Lift: Disconnects pin-1 at XLR output
    • XLR Configuration: AES standard (pin-2 hot)
    • Speaker Filter: -30dB pad and band-pass filter
    • Connectors: 1/4-inch in & thru, XLR-M out
  • General:
    • Construction: 14 gauge steel chassis & outer shell
    • Finish: Durable powder coat
    • Size: (L x W x D) 5" x 3.3" x 1.8" (127mm x 84.1mm x 45.5mm)
    • Weight: 1.55 lbs (703 grams)
    • Shipping Size: L x W x D: 6.5" x 4" x 3" (165mm x 102mm x 76mm)
    • Shipping Weight: 1.92 lbs (870.9 grams)
    • Power: Passive, no power required
    • Conditions: For use in dry locations only between 5°C and 40°C

Radial JDI Passive Direct Box Applications

  • Ideal for acoustic guitars and basses
  • Keyboards, modules and electronic drums
  • Great with high-output, electronic instruments
  • Eliminates hum & buzz in sound systems

Radial JDI Passive Direct Box Includes

  • Radial JDI Passive Direct Box
  • Manual & Literature
  • Radial Sticker
  • 3 Year Warranty

8 Reviews Hide Reviews Show Reviews

  • 5
    Excellent di box
    Jacob L

    Very nice for bass guitar. I have a music-man I plug into this thing and it is pro sound. Not a complaint very happy.

  • 5
    Excellent/RADIAL JDI review
    James Ezzi

    This product performs as expected and does not disappoint. Just beginning to explore all the possibilities.

  • 5
    Blue EnCore 100 mic's
    Stuart Liberty

    Excellent Mics. Quality Build. Outstanding service and support from Front End Audio. As always....

  • 5
    Perfect DI
    Stephen Leiweke

    From acoustic guitars, bass, keyboards, and whatever else I've thrown at this DI, it has captured everything very musically without any problems what so ever.

  • 5
    A workhorse
    Fredrik Lyxzen

    Cheap DI boxes can screw up the sound and add noise. I learned that the hard way.. Not this one! I use one in my home studio and it sounds great. It adds alittle thickness (but it never gets muddy) to the signal. I also use a bunch of them at the venue when I do live work. The venue also have a few other DI boxes but I always use the Radial JDI's because the excellent reliable build quality.

  • 5
    Solid as always
    Tom G.

    JDI products in general are absolutely top-notch. This DI box is no different. From studio work with bass guitar to live acoustic guitar, etc. my JDI Passive Direct Box always sounds great. If I ever lost this or if it was ever stolen I would replace it immediately with the same. There would be no question about it.

  • 5
    Best passive DI on the market
    Phill Richardson

    The JDI passive DI should be an essential componenent of any gigging or recording musician. Even at many well attended venues, the fact remains that they often cut corners on DIs, buying cheap. If you plan to gig acoustic guitar, it pays to keep this in your case. It is also fantastic for recording when you want to take a transparent direct take while you are miking your acoustic, which allows you to blend the tones if desirable ( and if your guitar has a quality preamplifier). I even like to run a dry direct signal from my bass into the JDI and use the thru-put Jack to connect to another preamplifier/DI, such as the Aguilar Tone Hammer or the UA Solo 610. When you capture an inspired take, this gives you options at the mix down stage to choose the mix that best sits in the mix, and can save a lot of time from the quagmire of processing the bass line until it's sits well. If you need a passive DI, this is the one you ought to buy

  • 5
    Radial JDI
    Ivette Torres

    This is an awesome DI. I use it for guitar, keyboards, and for reamping. It helps to smooth out any harshness in keyboards, guitars, smooths it out. I use it all the time and it does what it's supposed to and does it really well.

What We Think

avatar

The Radial JDI Passive Direct Box is an indispensable tool in our audio-toolkit, whether it be in the studio or when we mix or record live sound. The Radial JDI Passive Direct Box sees as much action as our most used microphones. It's beat up and weathered, but it never misses a note. We insist on using it. Why? Most DIs included in bass and keyboard amplifiers are well-intended cost-effective additions that unfortunately end up being unintended problems when put into the real world. Electronic noise and a hard and unmusical, two-dimensional sound are but a couple of the results that have plagued us when resorting to using an on-board DI. A quality DI signal simply requires quality components. And the Radial JDI Passive Direct Box makes for one of the best quality signals that we have encountered. Basically, we look at it as not having any detrimental effect on the sound. The Jensen transformer has a frequency response that is incredibly flat, yet it lends a certain 'energy absorption' character that is very musical when a bass string is plucked extra-hard, or a keyboard part gets particularly 'stabby'. So, when we're wiring a stage and the musician starts to point me to their onboard DI, we politely decline and explain that we've got that covered with a dedicated unit that will kill any potential noise. And that's the truth. Plus, due to the wide variations in rock-club design and PA placement sometimes the FOH sound can be out of phase with the onstage amp, and the bass player's reference disappears. The 180-degreee button solves this problem by inverting the signal going to the front of house / monitors. The 'Merge' button will take incoming signals from both the Input and Thru jacks and sum them to Mono; perfect for stereo-only keyboards or other instrument level sources who you don't need to waste a 2nd valuable DI or channel for summing down to mono. We also own the Radial J48 which is a go-to for a lot of acoustic guitars and anything that has a lower output that could use a little help. Conversely, the Radial JDI Passive Direct Box usually likes a little more juice from the mic preamp than, say, 'unity'. But the Radial JDI Passive Direct Box simply would be my desert island DI. we can do anything with it, and know that it'll be there for us - even if it falls off a 10-story building or run over by an 18-wheeler, or whatever.

Front End Audio, Your Ultimate Pro Audio Dealer

Got questions? Call us at 1-888-228-4530 we are here to help!

OVERSIZED & HEAVY

OVERSIZED & HEAVY!

This Oversized & Heavy special order item may require additional shipping and cannot be canceled or returned.

This is a special order item that is considered oversized and heavy by all shipping carriers and will most likely be delivered via a freight truck.

Due to the item’s size and weight, additional shipping may have to be collected and once ordered cannot be canceled or returned. We will contact you if the final shipping quote differs from the shipping estimate provided at checkout. This item will ship as quickly as possible but there may be a lead time.

Please contact us for further information or for a more detailed shipping timeframe and cost.

Qualifies for Free Shipping

FREE SHIPPING!

On Orders over $99 in Lower 48 States

Shipping is expensive thats why Front End Audio has made it easy for you to ship your orders for free. Qualified orders of $99 or more enjoy free shipping in the lower 48. It doesnt get much easier that that!

There are some exclusions so check out our Shipping Policy page in the Customer Service section at the bottom of the page.

Tax Free Shopping

TAX FREE SHOPPING

Enjoy Tax Free Shopping outside of SC.

If you are ordering from outside the state of South Carolina - congratulations! Front End Audio does not collect sales tax for purchases made outside of SC. In all other states, you are responsible for your own taxes.

Financing

Financing

Financing

Financing

LifeTime Support

LIFETIME SUPPORT

We stand behind our customers!

Plain and simple, if you purchased a products from Front End Audio then our staff will always be here to give you support. From techincal and application questions to good ol' advice, we have you covered.

30 Day Returns

30 DAY RETURNS

Hassle free returns, easy and convenient.

Our return policy is simple. If you don't like your item for any reason, contact us within 30 days of receipt and we will authorize you a return authorization number no questions asked! There are a few exclusion so check out our Returns Policy page located in the Customer Service section at the bottom of the page.

EASY FINANCING

EASY FINANCING

Easy and convenient financing designed for you!

We here at Front End Audio know exactly what it's like to be working with a budget while making gear purchases. Therefore we have been working to make a variety of attractive and convenient financing options available to you. Whether financing your gear is for business or pleasure, optional or a necessity, Front End Audio has a financing plan that will work with your needs. Simply checkout the Financing page located in the Resources section at the bottom of the page.

Free Shipping

FREE SHIPPING!

On Orders over $99 in Lower 48 States

Shipping is expensive thats why Front End Audio has made it easy for you to ship your orders for free. Qualified orders of $99 or more enjoy free shipping in the lower 48.! It doesnt get much easier that that!

There are some exclusions so check out our Shipping Policy page in the Customer Service section at the bottom of the page.

Special Order Item

SPECIAL ORDER ITEMS CANNOT BE CANCELLED OR RETURNED

Special Order items are typically ordered in directly from the manufacturer so there may be a lead time. Rest assured that we will ship this item as quickly as possible. If you have a deadline or timeframe questions then please contact us before placing the order so we can make sure that we can meet your expectations.

Digital Delivery

LICENSE WILL BE EMAILED WITHIN 24 HOURS

This product is delivered electronically within 24 hours. However, if you're ordering after 6PM EST weekdays or on weekends, we'll process your order the next business day.

When purchasing electronic licenses or software it is your responsibility to make sure that your computer system meets and or exceed the required specification to install, run and operate the software. Electronic licenses are not returnable for any reason.

Authorized Dealer

AUTHORIZED DEALER

Piece of mind, support beyond your purchase!

Front End Audio is an authorized dealer for all the product lines we sell. What that means for you is that anything purchased through Front End Audio is guaranteed 100% authentic gear and carries a full manufacturer’s warranty.

Product Question

!