all starts with great tone!
with all Radial products, all efforts have been
made to ensure the very best and natural transfer
of the instrument’s tone is maintained.
The PZ-Pre features 100% discreet class-A piezo
boost circuitry (PZB) to provide the most musical
transfer plus a high efficiency preamp designed
reduce distortion and noise while maximizing headroom.
There are two inputs on the PZ-Pre. Each of these
may be used independently for two instruments
or combined using the blend (mix) function. These
can be used with instruments equipped with a built-in
preamp such as an acoustic-electric guitar or
using an external buffer from a piezo type source.
The instrument select footswitch lets you chose
which instrument is active by selecting the input
channel. Adjusting the level controls lets you
control the level for each instrument or pickup
and balance the tone as needed.
Each input is also equipped with a piezo booster
(PZB) that allows a low output pickup such as
a piezo electric element to be connected without
the use of an external preamp. The ultra-high
fidelity of the class-A piezo booster coupled
with the high 10 meg ohm input impedance assures
you get the best signal transfer without distortion
The blend allows you to accept two sources and
mix the two channels together. This is a welcome
addition for instruments that may have two pickups
built-in or when combining two sound sources.
You can even have two guitarists connected at
the same time for a jam!
Acoustic instruments are notorious for on-stage
feedback and runaway resonance. A three position
high-pass filter (which means that it reduces
the low frequencies) is extremely effective at
getting rid of runaway resonance which often causes
harmonics to feedback. This also serves to get
rid of low end rumble that can cause a mix to
The size of the instrument determines its tone
and resonance, which in turn can cause feedback.
This is addressed by providing a variable notch
filter with two different Q's or notch depths
that lets you dial in the offending frequency
and eliminate run-away feedback.
Once again, since all instruments are different,
the PZ-Pre’s tone shaping has been designed
to address the various characters with a 3-nand
EQ and semi-parametric mid range control. This
simple yet highly effective EQ is lets you dial
in the sweet-spot for the most natural and dynamic
Technically speaking, this is actually a polarity
reverse switch that lets you control the internal
polarity of the signal path before it reaches
your on-stage amp. It is used to help reduce feedback
on stage when the physical location of the performer,
the monitors and the stage amp coincide to cause
a feedback hot-spot.
This foot switch lets you activate the power booster
for soloing or add-in effects using the inserts
send & receive jacks. For instance, you could
add a chorus and slight boost for a passage. The
power booster assign switch lets you assign the
boost footswitch to activate the power booster,
the effects loop or both. Adjust the power boost
level to suit!
Mute and tuner
A mute switch lets you easily silence all of the
outputs except the tuner out for quiet tuning
on stage. The tuner output is separately buffered
so that it does not load the pickup or allow tuner
clocking circuit to cause noise.
This is a buffered output that is designed to
drive an on-stage amplifier.
The PZ-Pre is equipped with two direct boxes:
one is pre-effect, pre-EQ that sends the unprocessed
instrument signal to the PA system to allow the
house engineer to set the tone for the room. The
second is post-effect, post-EQ for on-stage wedge
monitors or in-ears. This is used when you want
to send ‘your’ sound to the PA system.
supply: 15VDC 400mA, center
# R800 9407 00 - 120 volt - USA, Canada,
Part # R800 9407
01 - 230 volt - Continental Europe
Part # R800 9407 02 - 230
volt - United Kingdom
# R800 9407 03 - 100 volt - Japan
Part # R800 9407 04 - 240
volt - Australia