True to the Music
®
Radial Engineering Ltd.
JDV-Pre
™
500 Module
10
1
9
8
Rear Panel
7
1
4
3
2
6
5
FEATURE SET
1. GAIN: AccuState level control simultaneously adjusts the
gain and input sensitivity to ensure lowest noise at all gain
settings.
2. INVERT: Reverses the polarity on the JDV output. Ideally
suited for reducing feedback on stage or can be used in the
studio to better phase align two signals for improved stereo
imaging.
3. HP FILTER: High-pass fi
lter reduces low frequency
resonance, helps clean up the sound of acoustic instruments
and eliminates run-away feedback. Great for layering tracks
when recording.
4. DRAG: Engages the Drag control. This shifts the impedance of
the front panel ¼” input from a fi xed 3.9meg-Ohms for passive
piezo pickups to a variable load for magnetic pickups.
5. LOAD ADJUST: Varies the load from 22k-Ohms (fully counter-
clockwise) to 500k-Ohms (fully clockwise). Replicates the load
of a tube amplifi er on a magnetic pickups for a smoother, more
natural tone. Great for bass and guitar!
6. LED INDICATORS: For power, signal present, peak-overload,
and phantom power provide visual feedback of the JDV-Pre
operating status.
7. INPUT: Used to connect high impedance instruments to the
JDV-Pre. This front switching jack has priority over the XLR
mic input on rear panel of 500 series rack.
8. AUX OUT: Buffered output used to feed a guitar amplifi er.
Transformer isolated to eliminate buzz and hum caused by
ground loops.
9. OMNIPORT: Balanced, low impedance direct box output (mic-
level) designed to feed a snake system and mixing console
in a live touring environment. Available when used with the
Workhorse rack.
10. XLR INPUT (rear panel of rack): Microphone input with
phantom power. Enables the JDV-Pre to be used with
instrument condenser mics. Transformer coupled for optimal
signal fl ow. This input is disabled when a plug is inserted into
the front panel ¼” input.
11. PHANTOM POWER - Turns on/off the +48V power supplied
through the rear panel XLR microphone input. When engaged
the front panel LED indicator will illuminate. Used to power
condenser microphones connected to the XLR mic input.
Phantom On
11
