Introduction; Overview; Block Diagram - Radial Engineering J+4 User Manual

INTRODUCTION

Congratulations and thank you for purchasing the Radial J+4. This innovative
signal converter and line driver off ers options and performance designed for
the touring engineer, broadcaster, AV integrator and rental company that must
regularly interface consumer type audio equipment with pro-audio systems.
This manual contains all the information you need to start using the J+4 right
away. Although the J+4 is 'plug and play' easy to use, we suggest you read
through it and familiarize yourself with the features to get the most out of your J+4.
Should you have any questions, comments or concerns not covered in these
pages, please visit our web site and the J+4 FAQ section. This is where we post
the latest details and applications. If you do not fi nd what you need feel free to
send us an email at info@radialeng.com and we will do our best to answer
your question as quickly as possible.

OVERVIEW

The Radial J+4 is a stereo interface designed to accept consumer level -10dB
unbalanced high impedance signals and convert them to +4dB balanced low
impedance signals for easy manipulation in professional audio environments
such as broadcast, recording studios and live touring.
Careful attention has been paid to eliminate noise by combining the advantages
of active signal buff ering with transformer isolation. The J+4 delivers 100dB
signal to noise while ensuring hum and buzz caused by ground loops along
with spurious noise from digital clocking does not pollute the signal path.
Controls include a stereo level control, high pass (low cut fi lter) and ground lift.
A selection of input connectors include a stacked set of ¼" jacks for DJ mixers
or keyboards, RCA's for CD players and a mini 3.5mm for smartphones making
the J+4 convenient and quick to use.
As with all Radial products, the Radial J+4 is built tough to handle the most
abusive environments. A unique 14-gauge steel I-beam inner frame ensures the
sensitive PC board will not be subjected to outside stress which could potentially
cause solder joints to fail. An innovative book-end outer shell creates protective
zones around the sensitive controls, switches and connectors to further improve
dependability while a full bottom no-slip pad provides both mechanical and
electrical isolation.

BLOCK DIAGRAM

LEFT 1/4" INPUT
LEFT RCA
INPUT
STEREO 1/8" INPUT
RIGHT 1/4" INPUT
RIGHT RCA
INPUT
Radial Engineering Ltd.
LEVEL
BYPASS
HPF
HIGH PASS
FILTER
-3dB @ 100Hz
12dB/Oct
LEFT XLR
OUT
GND
LIFT
RIGHT XLR
OUT
J+4 ™ User Guide