Radial Engineering PZ-DI User Manual

Radial Engineering Ltd. PZ-DI™ User Guide
USING THE -15DB PAD
As previously mentioned, the -15db PAD is used to reduce the PZ-DI’s input sensitivity. This lowers the signal level while
also lowering the impedance to reduce susceptibility to noise. Most instruments do not produce enough output to overload
the PZ-DI. However, if you are using high output devices like active basses, digital pianos or maybe a headphone output
from a computer, engaging the PAD will help by avoiding overload which in turn can cause the circuit to distort. Reducing
distortion can often help reduce feedback!
USING THE LOW-CUT FILTER
One of the cool features on the PZ-DI is the variable low frequency
lter. This low-cut lter does exactly that, it cuts the bass frequencies
and allows the highs to pass. When using acoustic instruments on
a live stage, the low frequencies generated by the PA system can
often cause the top of the instrument to resonate and feedback due
to the vibrations. This is all the more acute when using a top-mounted
piezo-electric device that is afxed on the top or the bridge. Activating
the low-cut lter reduces the bass frequencies going to the PA which
in turn, reduces resonant feedback.
Start by setting the lter control completely counter-clockwise. Slowly turn it clock-wise until you notice the bass roll off.
Turn back a bit and you are set. The lter position is usually set in proportion to the size of the instrument whereby larger
instruments such as a contrabass will be set with more bass, while a cello or violin will have less.
7
-15
-10
-5
+0
+5
+10
20 20k50 100 200 500 1k 2k 5k 10k
Hz
PZ-DI Low-Cut Filter Response

Radial Engineering PZ-DI Specifications

General

Brand	Radial Engineering
Model	PZ-DI
Category	Music Equipment
Language	English