Radial Engineering Ltd. J48 Stereo™ User Guide
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j48 stereo direct box
user guide
Introduction 1 ........................................................................
J48 Stereo Features 2 ..........................................................
Making Connections 3 ..........................................................
Using the PAD 4 ...................................................................
Using the Ground Lift......................................................... 4
Using Various Instruments 5 .................................................
Examples 6 ...........................................................................
Using the High-pass Filter 7 .................................................
Using the Polarity Reverse 7 ................................................
Optional mounting accessories 8 .........................................
Specications .................................................................... 9
Block diagram 10 ..................................................................
Radial Limited Warranty Back Cover ....................................
Thank you for purchasing the Radial J48 Stereo. This wonderful active direct box employs a unique internal switching
supply that employs 48 volt phantom power and steps it up to increase the signal handling while it lowers distortion of all
types. Part of the magic behind the design is that it enables the user to lift the audio ground connection to eliminate noise
without disconnecting the 48V phantom power source. This means that you can enjoy the benets of an active direct box
without having to resort to batteries or some form of external power supply. This makes the J48 Stereo a very effective DI
box for all types of instruments in both live stage and studio recording applications.
The J48 Stereo is in fact a very easy to use direct box that is purpose-made to be compact and quick to deploy. You simply
plug it in, turn on the phantom power and it goes to work. There are however a number of features built in that should be
understood in order to get the most out of your J48. So please take a few minutes to go through this user guide to ensure
you get the most out of it. If after you have read it, you nd yourself asking questions; please visit the FAQ section of the
web page. This is where we post updates and questions from users. If you still do not nd the answer or need further
clarication, we invite you to send us an email at info@radialeng.com and we will do our very best to reply in short order.
Now get ready to enjoy the world’s nest phantom powered active direct box!
