TruetotheMusic
Radial Engineering JPC User Guide
1
INTRODUCTION
Congratulations on your purchase of the Radial JPC direct box.
The Radial JPC is a stereo direct box that has been specifically designed to interface computer sound
cards and other consumer electronic products with professional sound systems. It is unique in
that it combines the advantages of transformer-isolated inputs with an active drive circuit,
giving you the ‘best of both worlds’ in a compact and extremely flexible package.
Transformer coupled inputs have the unique advantage of isolating the
‘source’ from the ‘destination’. This proven approach eliminates 60-cycle hum
and buzz caused by ground loops when two electrically powered devices are
connected together. Because the active circuit does all of the impedance
conversion and balancing, a dedicated 1:1 transformer can be used. This
results in a hybrid design that is at once great sounding, compact and
more affordable.
As with all great designs, simplicity is a fundamental trait, and the
Radial JPC certainly fits the bill.Achoice of ¼”, 3.5mm and RCA input /
thru-put connectors make interfacing a snap with all types of equipment.
Asingle switch inserts a –15dB pad into both channels, two power LEDs
(one for each channel) confirm 48V phantom is turned on, and a pair of
XLR output connectors round out the feature set.
Of course like all Radial products, the JPC is built to handle the most
abusive environments. Our unique bookend design protects switches and
connectors from damage while the 14-gauge steel I-beam construction
eliminates outside stress that could torque the PC board and cause solder
jointfailure.Afull-bottomno-slippadprovideselectricalinsulationandmechanical
isolation while also helping the JPC ‘stay-put’ on hectic stages.
Although the JPC is really easy to use, we highly suggest you read through this
manual and familiarize yourself with the JPC’s features. This will help you make the most
outof this marvellousdevice.Wealsosuggestvisiting our websiteatwww.radialeng.comformore
information and updates. Should you have any questions or concerns that are not covered in this manual
Now plug in your JPC and let the show begin!
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