Radial Engineering Ltd.
JDX™ Direct-Drive™ User Guide
6
REAR PANEL BALANCED OUTPUT
This active output is used to feed a PA or recording system. This follows
the AES standard with pin-1 ground, pin-2 (+) and pin-3 (-). It is a mic level
output and thus should be connected to a standard mic input on a mixer
or studio preamp. The XLR out has two top panel functions:
Polarity Reverse
This toggles pins-2 and 3 at the XLR output and is primarily used as a
creative tool to phase correct the direct output so that it better aligns with
a microphone in front of an amp. This of course assumes you are using
the ‘thru’ out to feed a stage amp and will be combining the two channels.
It can also be used if interfacing your Direct-Drive with an older vintage
preamp that may not follow the AES standard.
Ground lift
This disconnects pin-1 on the XLR to help reduce hum and buzz caused
by ground loops. Hum often finds its way into audio systems due to voltage
discrepancies within the power system. Lifting the ground disconnects
the audio ground in between the Direct-Drive and the PA or recording
system which can often alleviate noise. If you hear buzz, try pushing the
switch upwards.
