PZ-Pro™
Radial Engineering Ltd.
6
MAKING CONNECTIONS - THE 1/4" INSTRUMENT INPUTS
The PZ-Pro features two 1/4" inputs on the rear panel,
allowing you to connect two instruments and toggle
between them or blend both together simultaneously.
Using these inputs you can switch between two guitars
with different tunings, blend together multiple pickup types
on a single instrument, or switch between other acoustic
instruments such as mandolin or banjo.
Each input is equipped with a corresponding Level
control, allowing you to adjust the relative volume of
each instrument and compensate for any differences in
output levels from your pickups. Start with both Level
controls at 12 o'clock - this is the unity gain setting on the
PZ-Pro. When turned up fully clockwise, the Level
controls p20dB of gain to your input signals.
When using just a single instrument with the PZ-Pro, plugging into input
A allows you to use both channels of the PZ-Pro as if you were playing
through a two-channel amplifier. This is due to the fact that Input A
automatically feeds into Input B when nothing is connected to the Input B
1/4" jack (and when the Mic On switch is disengaged). This gives you the
ability to use both of the input channels with a single instrument, so you
can use the Toggle Footswitch to select between the two Level, EQ and
Filter settings when switching between verse and chorus, for example.
USING THE PZ BOOST SWITCHES
Each of the 1/4" Inputs on the PZ-Pro is also equipped
with a special PZ Boost circuit, which can be activated
by engaging either one of the recessed switches on
the right side of the unit. These switches raise the
input impedance of each of the 1/4" inputs from 220k
Ohms to 10Meg Ohms, while simultaneously engaging
a class-A signal booster to bring the level up by an
addi10dB.
This PZ Boost helps broaden the frequency response and smooth
out the transient peaks of instruments that employ piezo transducers.
Engaging the PZ booster won't harm typical pickup systems, so feel free
to experiment and try it out on different input sources to see if you like
the results.
The 1/4" Inputs
The Level controls
With only a single instrument connected to Input A, use the
Toggle Footswitch to access the Level and EQ controls on channel B
The Level controls
