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Description 

]

The microphone features a 50' (15.2 m) 

permanently-attached miniature cable. The cable
may be cut to any length and connected to screw
terminals on the AT8534 wall/ceiling plate power
module provided. The power module features a
white-finished standard electrical cover plate for
easy, secure installation. It can be powered from
any external 11V to 52V DC phantom power 
supply. Output is low impedance balanced.

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 ES933PMW/ML.

The ES933PM/ML is a wide-range miniature 

condenser microphone with a MicroLine

® 

polar

pattern. It is designed for quality sound 
reinforcement, professional recording, television
and other demanding sound pickup applications.
The ES933PM/ML is furnished with a vinyl-coat-
ed steel hanger that allows it to be adjusted for
correct positioning. An included custom foam
windscreen effectively reduces noise from wind
or ventilation air currents.

The MicroLine

®

polar pattern provides a 90°

angle of acceptance. Additional interchangeable
elements with cardioid (120°) and hypercardioid
(100°) pickup patterns are available.

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.

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.)

Feed the small cable from the mic through the

strain relief on the power module plate. Tie a
loose knot in the cable at the desired length and
push it down gently into the recess in the back of
the strain relief to secure the microphone. Cut
excess cable, strip the mic cable wires (Fig. 3) and
attach  them to their respective input terminals.
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. Ouput 
is phased so that positive acoustic pressure 
produces positive voltage at Terminal 2, in accor-
dance 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.

While a modern condenser microphone is not

unduly sensitive to the environment, temperature
extremes can be harmful. Avoid leaving the
microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for long
periods of time. Extremely high humidity should
also be avoided.

The combination of small size and excellent

response makes the ES933PM/ML ideal for 
suspension over choirs, instrumental groups or
theater stages. A uniform 90° angle of acceptance 
provides well-balanced audio pickup over a 
narrow area. 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 1.5 times the

distance to the closest performer. If additional
mics are needed for wide sources, they should be
positioned apart laterally at least 1.5 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 slips

over the MicroLine element, 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 (switch located on
circuit board). 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.

[

Installation and Operation 

]

ES933PM/ML

MicroLine

®

Condenser

Hanging Microphone

with Wall/Ceiling  Plate 

Power Module

LESS THAN 2 TIMES “X”

DIST

ANCE “X”

90

°

ANGLE OF
ACCEPTANCE

Figure 1

MIC A

1.5 TIMES

DISTANCE “X”

MIC B

90

°

90

°

Figure 2

Shield strands,
fully twisted

Yellow-Yellow

Red-Red

1

/

8

" strip reds

and yellows

1

/

2

"

1"

Figure 3

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