Radial Engineering JDI User's Guide

www.radialeng.com

RADIAL ENGINEERING 3 YEAR TRANSFERABLE WARRANTY

RADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in material and work­manship and will remedy any such defects free of charge according to the terms of this warranty. Radial will

repair or replace (at its option) any defective component(s) of this product (excluding nish and wear and

tear on components under normal use) for a period of three (3) years from the original date of purchase. In
the event that a particular product is no longer available, Radial reserves the right to replace the product with
a similar product of equal or greater value. To make a request or claim under this limited warranty, the prod­uct must be returned prepaid in the original shipping container (or equivalent) to Radial or to an authorized
Radial repair center and you must assume the risk of loss or damage. A copy of the original invoice showing
date of purchase and the dealer name must accompany any request for work to be performed under this
transferable warranty. This limited warranty shall not apply if the product has been damaged due to abuse,

misuse, misapplication, accident or as a result of service or modication by any other than an authorized

Radial repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DE­SCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF
THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL, INCIDENTAL
OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE OF THIS PRODUCT. THIS WAR­RANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH
MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE PRODUCT WAS PURCHASED.

True to the Music

™

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5

tel: [phone] • fax: [phone]
email: [e-mail] • web: www.radialeng.com

JDI User Guide v2.3 Nov. 2014 Part #: R870 1000 00 Copyright © 2009 - 2015 all rights reserved.

Features, appearance and specications subject to cange without notice.

JDI Order # R800 1010

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5

tel: [phone] • fax: [phone]
email: [e-mail] • web: www.radialeng.com

www.radialeng.com

JDI

Passive Direct Box
User Guide

True to the Music

Part 8 – Block diagram and specications

JDI Specications

Type: Passive Jensen Transformer equipped

Input impedance: Unbalanced 140k Ohms typical

Output impedance: Balanced 150 Ohms typical

Frequency response: 20Hz to 20kHz (+/- 0.2dB)

Linear performance: < -0.22 dBr deviation @20kHz

Total harmonic distortion: 0.05% @ 20Hz, 0.006% @ 1kHz

Phase distortion: 3º at 20Hz, 0.3º at 100Hz

Maximum input level: +21dBu @ 20Hz (1% THD)

Size: 3.5" wide, 2" high, 5.5" deep

Weight: 1kg / 2.2lbs

Construction: Welded 14-gauge steel

Finish: Baked enamel nish

RADIAL JDI™ USER GUIDE

JDI Block Diagram

TABLE OF CONTENTS PAGE

1. Introduction .................................................................................1

2. JDI feature set ............................................................................2

3. JDI quick start ...........................................................................3

4. Direct box basics .........................................................................4

5. Features and functions ...............................................................7

6. Other cool uses for your JDI .................................................... 11

7. Frequently asked questions ......................................................12

8. Block diagram and specications ..............................................15

Warranty ...................................................................... Back cover

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5

tel: [phone] • fax: [phone]
email: [e-mail] • web: www.radialeng.com

Features and specications are subject to change without notice.

Radial Engineering JDI™ User Guide

15

True to the Music

True to the Music

Part 1 - Introduction

Congratulations on your purchase of the world's nest direct box!

The Radial JDI is the latest version of the highly acclaimed JDI

and is without a doubt the nest passive direct box available

today. The JDI is very unique in that it does not color or alter
the sound in any way. This ensures that natural tone and
harmonic balance is retained, bringing out the very essence
of the instrument.

The JDI employs a Jensen JT-DBE transformer for
unmatched audio performance, exceptional noise

rejection and high signal handling. This makes it

ideal for acoustic guitar, bass and keyboards. In fact,

just about any audio signal is transformed gracefully

without artifact.

We suggest that you read this manual before using
the JDI so that you can maximize its potential.
Please log onto the Radial Engineering website
at www.radialeng.com for further details and FAQ
updates. We invite you to forward any comments,
questions or suggestions to [e-mail]

- we’d love to hear from you.

Enjoy!

Q: Is a at frequency response better than a colored response?

A: This is a good question. When buying a large condenser microphone, you are most often not getting a at response mic,
but a mic colored or avored to add to your sound palette. Most studios boast a selection of mics and the sign of a good

engineer is one that knows ‘which mic to use on what’ in order to get a particular tone. With direct boxes, this is usually not
the case. If the sound of the guitar is not right, one will usually change the guitar, not the direct box, therefore we believe
the role of the direct box is to transport the original signal as faithfully as possible from the instrument to the destination
and allow the engineer and producer to make the artistic choices. Here’s more food for thought… should the direct box
change the tone of the instrument? If it makes your Strat sound fat, will it make your Les Paul muddy? We think a properly
designed DI should be faithful to the source. The Radial JDI direct box gives the engineer and producer a natural and
uncolored sound to work with.

Q: What about tube direct boxes?

A: Tube direct boxes are cool and there is a denite place for them in the recording world. Tube DI's introduce personality

to the sound and should be viewed in the same way as one views a tube microphone.

Q: If my JDI ever fails, what do I do?

A: In the past 10 years the JDI has been so reliable that it is a rare occurrence when we need to repair one. If however
something goes bad, a switch for example, simply call Radial and we will issue a return authorization number for you to
send it back to us for repair. We do suggest that before you do so, visit the dealer where you bought it and have them check
it out before sending it away. Often times, it turns out that bad cables are the actual problem.

Q: What is the warranty on the JDI?

A: The Radial JDI carries a 3-year warranty while the Jensen® transformer inside carries a 20-year warranty. Repairing
the transformer can be done either through Radial or directly with Jensen Transformers.

Q: Can I rack-mount the Radial JDI?

A: Yes. This is easily done with the Radial J-Rak. The J-Rak is a 2RU shelf that holds as many as 8 Radial small format
direct boxes, like the JDI or J48 which can be front or rear-mounted depending on your intended application.

Q: Can I rack-mount the Duplex?

A: No. The Radial JDI Duplex is designed as a stand-alone device. If you are looking for a rackmount solution that takes up even
less space than the J-Rak, the 1-RU Radial JD6 may be your solution with 6 JDI channels in 1 RU space.

Radial Engineering JDI™ User Guide

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Radial Engineering JDI™ User Guide

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