Using The Jdv - Radial Engineering JDV Mk5 User Manual

True to the Music

using The JDV

Adjusting the DRAg Control
When you connect your bass to the JDV the signal will be buffered by a
unity gain amplifi er. This can brighten your tone and enable much longer
cables (upwards to 15 meters or 50') to be used without noise. Drag™ is
a load correction circuit that enables the user to replicate the tone and
feel as if connected directly to your amp using a regular 15' guitar cable.
To activate the DRAG control, push the set & forget switch inward. Start
by setting the Drag control to 12 o'clock and rotate it clockwise. You will
note the tone will become brighter. Now try turning it counter-clockwise
to darken the tone. Adjust to suit. Drag control has little effect on an
active bass or acoustic guitar with built-in electronics as the signal is
pre-buffered by the electronics inside the instrument.
When set in the outward position, the DRAG control is turned off and the input impedance
rises to 10MΩ to suit piezo transducers.
Using the high-pass fi lter
One of the most practical functions on the JDV is the high-pass fi lter
(HPF). This fully variable control lets you adjust the cut-off point or low
frequency limit to eliminate resonance. What few realize is that by re-
ducing excessive low frequencies, instruments will fi t more naturally into
the mix, enabling their levels to be louder without competing as much
for bandwidth. This 'Nashville trick' has been used for years to combine
various acoustic instruments such as upright bass, acoustic guitar, banjo,
fi ddle and mandolin by sizing the instrument to suit.
Start by rotating the fi lter clockwise until the low frequency cut-off
becomes audible. Then back off the control slightly. This will not only
clean up your mix, but also help eliminate weird modulations that can
creep into recordings.
When using two sources simultaneously, listen to each one individually as you adjust the low
frequency cut-off point and then remix the two channels (sources) to suit.
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JDV™ Mk5 Active Direct Box
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