SPECIFICATIONS DESCRIPTION AND APPLICATIONS
Element: The Electro-Voice Model AE20 is a
Dynamic professional quality dynamic cardioid
Frequency Response:
45-18,000 Hz
Polar Pattern:
Cardioid
Impedance:
50, 150 and 250 ohms
changed by solder connections
Sensitivity,
Open Circuit Voltage:
1.5 mV/Pascal at 1,000 Hz
Power Level:
- 57 dB at 1,000 Hz
(0 dB = 1 mW/Pascal)
Case Material:
Steel
Dimensions:
216.7 mm (8.53 in.) long,
54.4 mm (2.14 in.) widest diameter,
49.2 mm (1.94 in.) body diameter
Finish:
Fawn beige micomatte
Net Weight:
737 g (1 lb, 10 oz) without cable
Cable:
4.6 m (15 ft), 2-conductor shielded,
rubber-jacketed, brown broadcast-type
cable, supplied with Switchcraft A3F
connector on microphone end
Accessories Furnished:
81715 stand adapter
Optional Accessories:
Model 309 shock mounted stand adapter
for use with floor stand or
recording boom
microphone created specially for recording,
broadcast, and sound reinforcement applica-
tions requiring essentially flat response over
a very wide frequency range. The wide
frequency response, coupled with excellent
transient response, makes the RE20 easily
comparable to the finest condenser cardioid
microphones, however, the RE20 is virtually
free of bass-boosting “proximity effect” when
used close, because in design it is a
Continuously Variable-D microphone. An
easily operated “bass tilt down” switch
corrects spectrum balance for use in long-
reach situations, or other applications where
bass attenuation is needed.
A true cardioid microphone, the RE20 offers
greatest rejection at 180° off axis - directly
to the rear of the microphone. Directional
control is so effective that the frequency
response is nearly independent of angular
location of sound source, creating virtually
no off-axis coloration yet providing greatest
possible rejection of unwanted sounds.
An integral blast and wind filter covers each
acoustic opening on the RE20. At recording
sessions and on stage, singers can “close
talk” the microphone, singing with their lips
almost touching the grille screen with no
worry of “p-pops” or excessive sibilance.
Part of the filter also shock mounts the
internal microphone element, reducing the
transfer of vibrations from external sources.
Using the mechanical nesting concept of
design - the internal transducer parts are
nested one within another - the RE20 is
able to withstand all rigors of professional
use.
The RE20 is supplled wired for 150 ohms
impedance. Fifty- and 250-ohm impedances
are available through a simple wiring change
(see “Changing Impedance Connections”
section).
CHANGING IMPEDANCE CONNECTIONS
The RE20 is shipped wired for 150 ohms.
Fifty or 250 ohms may be obtained,
however, through the following procedure:
1.
2.
3.
4.
5.
6.
Refer to Figure 4. Insert a screwdriver in
small hole “A” at the rear of the
microphone. Turn counterclockwlse until
the captive screw “bottoms”.
Gently remove insert “B” exposing rear
cover holddown screw “C” (Allen head).
Disengage screw “C” from main
microphone body with an Allen wrench.
Carefully remove rear cover “D” to
expose several solder terminals as
shown in Figure 5.
Impedance may now be changed by
moving the red wire to one of the open
solder terminals (marked 250 and 50).
Replace the rear cover by reversing
Steps 1 through 4. Be
sure that locating
