Radial Engineering PZ-DI User Manual page 6

True to the Music
The Magnetic Electric
Start by connecting the electric guitar amp using a standard ¼"
cable. Turn the amp on, turn up the volume a bit and test to make
sure it works by depressing the electric footswitch. The LED on
the PZ-DI should illuminate and you should hear sound.
To keep the purist happy, the magnetic (electric pickup) signal
path has been purposely kept extremely clean. We have employed
Radial's award winning class-A buffering circuit and Drag Control
load correction to ensure a natural sounding, noise free connec-
tion is delivered to your amp. Set the Drag Control to 12 o'clock
using a guitar pick as a screwdriver. This 'set & forget' control
is recessed so that once you have decided on where you like it
- your setting will not accidentally get changed.
Drag Control reintroduces the load on the pickup to replicate how
the guitar sounds when connected directly to a tube (valve) amp
through a length of cable. Because the PZ-DI is buffered, the
signal will likely be too clean if set to full. The 12 o'clock position
replicates the sound of a Fender Stratocaster® connected to a
tube amp. Try it, it will blow you away.
The Piezo Acoustic
For the piezo (acoustic pickup) source, you actually have two
outputs to choose from: the stage amp and the direct box. Start
by connecting the stage amplifi er following the same process
as described previously. Testing the signal is merely a matter
of depressing the footswitch, checking the LED to make sure it
goes on and then turning up your amp. The piezo output is also
transformer coupled so that it can be electrically isolated from the
guitar amp on stage. This helps tremendously in eliminating buzz
and hum caused by ground loops. If, after you connect, you still
hear hum or buzz this can usually be eliminated by switching the
¼" ground lift switch to the upward position.
The piezo channel is equipped with two fi lters. The hi-cut (low
pass) fi lter is designed to roll off the high end from the piezo as
these can often sound harsh or edgy. There are three settings:
Start by setting it to bypass (fl at) and listen. Then move the
switch to the fi rst and second fi lter set to select the position you
fi nd sounds best. The lo-cut (high-pass) fi lter employs the same
functionality only this time; it is used to roll off excessive bottom
end to prevent resonant feedback. This is particularly useful when
sending the acoustic signal to a full range PA system.
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Radial Engineering Ltd. PZ-DI User Guide
5