Radial Engineering Ltd.
JDV-Pre
™
500 Module
True to the Music
®
4
Using magnetic pickups
Magnetic pickups such as those found on a typical Fender bass are often recorded direct in
the comfort of the control room. The JDV-Pre’s front mounted ¼” input connector makes this
easy. All you do is plug in, turn up the volume and you are set to go.
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Drag control brings the natural tone of the instrument to a whole new level by allowing you
to replicate the load on the pickup as if connected to an amplifi er. This not only makes the
instrument sound more natural, it changes the response of the instrument so that it feels
right. To activate, you simply depress the Drag control on switch. This changes the input
impedance from 3.9m Ohms (optimized for piezo pickups) to a variable load that ranges from
22k Ohms to 500k Ohms.
Begin by setting the Drag Control to 12 o’clock. Then turn it clockwise.
The sound will become brighter with greater clarity. As you turn it
counter-clockwise the tone will warm up and sound smoother. Setting
the Drag is particularly important if you intend to Reamp the signal
down the way (read more about Reamping later in this manual). By
adjusting the load with the Drag control, guitars, pedals and amps will
sound more realistic.
The JDV-pre is equipped with a ¼” Aux output on the front panel. This is used to send the
instrument signal to a guitar amp while recording. This enables the guitarist to hear himself
play through a distorted amp while you capture the dry clean track on your recorder. The Aux
out is transformer isolated to help eliminate hum and buzz caused by ground loops. Ground
loops are a common problem when interfacing some guitar amps to pro-audio equipment.
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