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Radial JDX 48 Amplifier Direct Box 

Users Guide

Table of Contents 

Page

Design Concept ............................................................

1

Applications ..................................................................

2

Feature Set ...................................................................

3

Signal Flow ...................................................................4
Making Connections .....................................................

5

Using the JDX 48 .........................................................

6

Using the JDX 48 with a Microphone ...........................

6

Using With the Phazer ..................................................

7

Specifications ...............................................................8
Warranty ................................................................Back Cover

Congratulations on your purchase of the Radial JDX 48 guitar amp direct 

box, a unique tool for recording and performing with amplified electric 

guitar. The JDX 48 is an active speaker-level DI that taps the natural 

tone of your amplifier and interfaces it with professional recording and 

PA systems. 

The Radial JDX 48 is easy to use, however it differs significantly from 

standard direct boxes. Like any tool, the best way to get the most out 

of  your  JDX  48  is  by  understanding  the  design,  functions  and  safety 

features. We recommend you take a few minutes to read this manual 

before operating your JDX 48. 

Should you have any questions regarding the JDX 48 or it’s functions check 

our FAQ at www.radialeng.com. If you would like to share your experience 

with Radial products we invite you to contact us at [email protected]

The JDX 48, one small step for mankind, one huge leap for tone fanatics!

Summary of Contents for JDX 48

Page 1: ...t Box CAUTION Please read safety disclosure statement on the inside cover before connecting your Radial JDX 48 Radial Engineering Ltd 1588 Kebet Way Port Coquitlam BC V3C 5M5 Tel 604 942 1001 Fax 604...

Page 2: ...dealer Damage caused by improper operation is not covered under the warranty See the back cover for warranty details CAUTION USE OF THE JDX 48 WITH AMPLIFIERS WITH BRIDGED OR BALANCED SPEAKER OUTPUTS...

Page 3: ...ral tone of your amplifier and interfaces it with professional recording and PA systems The Radial JDX 48 is easy to use however it differs significantly from standard direct boxes Like any tool the b...

Page 4: ...cause these instruments almost always use an unprocessed sound and the PA system merely amplifies the levels of the direct signal Electric guitars generally don t use standard DIs because the amplifie...

Page 5: ...X 48 with a microphone is a great way to create new sounds The JDX 48 can also be mixed with a clean direct box signal for a cool effect For fun try recording the JDX 48 and microphone to separate tra...

Page 6: ...s hum and buzz caused by ground loops PSU JACK optional con nection for the included 15 volt DC power supply BASS EXT Boosts bottom end frequencies for bass XLR OUTPUT mic level 600 balanced XLR out p...

Page 7: ...former also pulls double duty by electrically isolating the signal passing through it effectively blocking noise caused by ground loops This is important because the JDX 48 connects a guitar amplifier...

Page 8: ...m to avoid loud transients 1 Connect your amplifier s speaker output to the FROM AMP jack on the JDX 48 2 Connect the SPEAKER jack on the JDX 48 to your speaker cabinet 3 Connect the XLR output to a m...

Page 9: ...ng console and eliminate the noise Mixing the JDX 48 with a Microphone Combining the sound of a microphone with the JDX 48 can add greater depth and fatten your guitar tone The JDX 48 and microphone s...

Page 10: ...will of course need to use two channels on your mixer one for the mic ed signal and the other for the direct feed from the JDX 48 You will also need the Radial Phazer JDX 48 AMPLITUDE TIME Microphone...

Page 11: ...harmonic distortion 0 015 10dBu input 1KHz Inter modulation distortion 0 03 10dBu input 1KHz Input impedance 15k Output impedance 2000 XLR out XLR configuration AES standard pin 2 hot Power 48V phanto...

Page 12: ...date of purchase and the dealer name must accompany any request for work to be performed under this limited and transferable warranty This warranty shall not apply if the product has been damaged due...

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