User Manual

ThruThru
MonitorsSub-Mixer
Balanced OutsBalanced Out
J48 Stereo with a keyboard, mixer and powered speaker.J48 Stereo with an acoustic guitar and stage amp.
Radial Engineering Ltd. J48 Stereo™ User Guide
3
OVERVIEW
MAKING CONNECTIONS
The Radial J48 Stereo is an active direct box that derives its power from the 48 volt phantom supply from the mixing
console or mic preamp. You simply plug in and it will quietly go to work.
As with all audio gear, always ensure audio system levels are turned down or equipment turned off before making connec-
tions. This will avoid plug-in or turn-on transients from damaging more sensitive components such as tweeters.
There are two channels on the J48. These are identical and feature a ¼” INPUT, a ¼” THRU-put and a balanced XLR out.
Connect your source instrument to the input and the balanced XLR out to the PA system or recorder. The THRU connec-
tor output provides the means for connecting the signal to a stage amp or personal monitor system. Simply connect the
THRU to your amp or monitor. Unbalanced cables are much more susceptible to noise than their balanced counterparts.
Keeping unbalanced cables under 8 meters (25’) in length is good practice while balanced cables can easily extend 100
meters (300’). The balanced output of the J48 Stereo is mic level, meaning that it should be connected to the mic input
of a mixing console or mic preamp. Once connected, make sure phantom power is activated. The green LED on the J48
Stereo will illuminate to let you know phantom power is present.
InputsInputs