Page 1
General Description:
The Heil PR 20 represents completely new
dynamic microphone technology designed
for a wide range of professional applications
such as live sound, commercial broadcast,
and sophisticated recording. Its wide
frequency range outperforms the tired, 30+
year old industry technology and can
withstand huge amounts of SPL. The end
result is a microphone that can answer the
call to any application. For example, the
gorgeous upper mid range makes the PR 20
the absolute best live vocal microphone,
while its outstanding frequency response
and superb dynamic range suit it perfectly
for use with a snare drum.
Since 1982, Heil Sound has been the leading manufacturer of communications microphones and has a paramount understanding of phasing. When properly applied, this
knowledge creates outstanding cardiod
patterns with unbelievable rear rejection
that removes unwanted sounds that try to
enter from the off axis rear. The pattern
control of the Heil PR 20 is outstanding.
This exceptional performance is achieved
by using the ideal combination of materials
for the large low mass diaphragm and a
special mixture of neodymium, iron, and
boron that gives the PR 20 the strongest
magnet structure available.
Page 2
In addition to the special magnet structure, the
PR 20 achieves its exceptional performance
by using a large 1 1/8” low mass voice coil
assembly. Special attention has been paid to
the phasing plug assembly with equally placed
ports that sense audio from behind, entering
them out of phase. Thus, the PR 20 produces
a very linear cardiod pattern and reduces the
proximity effect while achieving perfect articulation. This new Heil element is usable in
extreme high sound pressure levels and is
immune to overload conditions making it
perfect for vocal and live sound applications.
Welcome to your new workhorse microphone.
Engineers’ Specifications:
A high performance microphone shall bring
new large diameter technology to the industry.
It shall have a personality in it’s wide
frequency response of 50 Hz. to 18 kHz. at
the –3 dB points. The traditional Heil Sound
‘bouquet’ of mid range articulation will be
featured which will bring gorgeous speech and
instrument reproduction without the use of
outboard equalization. A high degree of phasing plug assembly shall reduce the rear rejection typically at –18 dB or better. A large 1 1/8”
diameter low mass voice coil assembly with a
specially treated diaphragm that can create
large dynamic levels. A special blend of
neodymium, iron and boron will produce the
strongest of magnet structure for this high
performance microphone. Nominal impedance shall be 600 ohms. The proximity effect
which is present in all cardiod microphones
will be properly eliminated in the design of this
new microphone. The microphone shall
exhibit bright natural sounds, perfect for
vocals as well as snare drum and cymbals.
The case will be created in steel, finished in
non-reflecting black matte color. The microphone shall have a maximum diameter of 1
5/8“ with a length of 7 5/16”. A cast zinc adjustable 5/8” – 27 stand patter lined in Teflon will
be supplied. The new dynamic technology
from Heil Sound shall be named the PR 20.
Dimension Drawing:
1 5/8
PR 20
Wiring Diagram:
Frequency Response:
Decibels Sound Pressure Level
7 5/16
15/16
20
10
0
-10
-20
Decibels, Arbitrary Units
Heil Sound Ltd.
5800 North Illinois
Fairview Heights, IL 62208
618-257-3000 618-257-3001 fax
www.heilsound.com
20
50 100 200 500 1000 2000 5000 10000 20000
-30
Frequency, Cycles per second (hertz)
For information contact
For orders contact
For technical support contact
618-257-3000
Loading...