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DESCRIPTION
The ES933PMC is a wide-range minia-
ture condenser microphone with a
cardioid polar pattern. It is designed
for quality sound reinforcement, profes-
sional recording, television and other
demanding sound pickup applications.
The ES933PMC is furnished with a
vinyl-coated steel hanger that allows it
to be adjusted for correct positioning.
An included snap-on foam windscreen
effectively reduces noise from wind or
ventilation air currents.
The ES933PMC is equipped with
UniGuard
®
RFI-shielding technology,
which offers outstanding rejection of
radio frequency interference (RFI).
The microphone is RoHS compliant –
free from all substances specified
in the EU directive on hazardous
substances.
The microphone's cardioid polar
pattern provides a 120° angle of
acceptance. Additional interchangable elements with omnidirec-
tional (360°), hypercardioid (100°) and MicroLine
®
(90°) pickup
patterns are available.
The microphone features a 50' (15.2 m) permanently attached
miniature cable. Its free end connects to the provided AT8534
wall/ceiling plate power module via TA3F-type connector. The
power module features a white-finished standard electrical cover
plate for easy, secure installation. The microphone can be powered
from any external 11V to 52V DC phantom power supply. Switches
in the power module permit a +10 dB gain setting for extra sensitive
pickup as well as a choice of flat response or low-frequency roll-off
(via integral 80 Hz high-pass UniSteep
®
filter) to help control
undesired ambient noise.
The microphone is enclosed in a rugged housing with a low-
reflectance black finish. It is also available with white housing,
cable and hanger as the ES933PMWC.
INSTALLATION AND OPERATION
The combination of small size and excellent response makes the
ES933PMC ideal for suspension over choirs, instrumental groups
or theater stages. A uniform 120° angle of acceptance provides
well-balanced audio pickup. The microphone should be located
forward of the front-most source, above the rear-most source, and
“aimed” between them (Fig. 1). Increasing the height of the mic
above the sources will tend to equalize sound levels between
them, but may also increase pickup of background or reverberant
sound. Whenever possible, the distance from the mic to the rear-
most source should be no more than twice the distance to the front
source, to maintain front-to-rear balance (Fig. 1).
Width of pickup is approximately three times the distance to the
closest performer. If additional mics are needed for wide sources,
they should be positioned apart laterally at least three times the
distance to the front source, to avoid phase cancellation (Fig. 2).
To orient the microphone in the proper direction, twist the housing
slightly in its wire holder (clockwise rotation moves the microphone
to the right; counterclockwise rotation moves it to the left).
The provided foam windscreen simply snaps over the head of the
microphone, effectively reducing noise from wind or ventilation air
currents.
An integral 80 Hz high-pass UniSteep
®
filter provides easy
switching from a flat frequency response to a low-end roll-off. The
roll-off position reduces the pickup of low-frequency ambient noise
(such as traffic, air-handling systems, etc.), room reverberation and
mechanically coupled vibrations. To engage the UniSteep
®
filter,
slide the switch toward the “bent” line.
A 10 dB gain switch is provided for situations that demand extra
sensitive pickup. The +10 position increases the microphone's
overall output by 10 dB. To engage the 10 dB gain, slide the switch
toward the +10 position.
ES933PMC
CARDIOID CONDENSER
HANGING MICROPHONE
The AT8534 wall/ceiling plate power module is designed to be
mounted in a standard metal U.S. single-gang electrical box. For
safety and best performance, use the electrical box
only for the
AT8534; do not include any AC power conductors. (Also route the
mic cable as far away from AC power cables as possible.)
Screw-terminal output connections of the AT8534 are the same as
those of an XLR-type plug: shield to Terminal 1, balanced signal
and phantom power to Terminals 2 and 3. Output is phased so that
positive acoustic pressure produces positive voltage at Terminal 2,
in accordance with industry convention.
Do not connect the output
cable shield to the box
. Double-check to make certain that all
input and output leads have no bare wires or loose strands that
could touch each other, the circuit board or the electrical box.
Then attach the power module plate to the electrical box.
Connect the TA3F-type connector from the microphone's cable to
the TA3M-type connector in the power module plate.
NOTE: Audio-Technica has developed a special RFI-shielding
mechanism that is an integral part of the connectors in the
Engineered Sound line. If you remove or incorrectly replace the
connector, you may adversely affect the unit's RFI immunity.
Audio-Technica offers a crimp tool (ATCT) and RFI shields for
TA3F-type, TA5F-type and XLRM-type connectors that enable you
to shorten the cable and correctly reinstall the connector while
maintaining the highest level of RFI immunity.
If you need to shorten the cable between the microphone and
power module, it can be done two ways:
a.If RF integrity must be maintained, the TA3F-type connector can
be removed from the cable end, the cable shortened and the
connector replaced using Audio-Technica's available crimp tool
and RFI shield for TA3F-type connector to maintain original RFI
shielding. (See note above.)
b.If RFI immunity is not required, the TA3M-type connector on the
plate can be removed and discarded (save the back nut and
washer). Assemble the included plastic ferrule into the hole left
from the TA3M-type connector, using the washer and nut from
the connector to secure the ferrule. Cut the cable to the desired
length plus a few inches. Thread the cable through the ferrule
and tie a knot in the cable behind the ferrule to secure it.
Carefully strip the ends of the cable and connect the wires to
the terminals formerly occupied by the TA3M-type connector.
Maintain color coding (Shield - S, Yellow - Y, Red - R) and
connect the microphone wires to the appropriate terminal
screws. (Fig. 3)
NOTE: The cable has two red wires and two
yellow wires. Twist the two red wires together and the two yellow
wires together. (Fig. 4)
(Continued on back)
LESS THAN 2 TIMES “X”
DISTANCE “X”
12 0°
ANGLE OF
ACCEPTANCE
Figure 1
MIC A MIC B
3 TIMES
DISTANCE “X”
120°120°
Figure 2
Shield strands,
fully twisted
Yellow-Yellow
Red-Red
1
/8" strip reds
and yellows
1
/2"
1"
v+
SIG
GND
3
2
1
Terminal screws
RED/
RED
YEL / YEL
SHIELD
INPUT
AUDIO -
AUDIO +
SHIELD
OUTPUT
Figure 3
Figure 4