POLAR
PATTERN
SUPERCARDIOID CONDENSER
LECTERN MICROPHONE
LM-201
he Crown® LM-201 is a professional-
quality, supercardioid electret condenser
microphone designed for use on lecterns,
Features
• Smooth, natural sound quality
• Built-in pop filter and supplied foam wind-
screen reduce breath pops
• Built-in shock mount attenuates thumps
• Rugged ball-and-socket swivel adjusts silently
• Supercardioid polar pattern reduces feedback
T
pulpits, or similar applications.
The microphone is easily installed with the in-
cluded mounting screws. As it is swiveled to the
desired position, adjustment is far quieter than
conventional gooseneck microphones. Swivel mo-
tion is limited to prevent cable damage. The LM-
201 is rugged and is built to withstand daily use.
Specifications
Type: Unidirectional condenser.
Element: Electret condenser.
Fig. 1
Frequency Response
Frequency response (typical): 100 Hz to 15,000 Hz.
Because of its supercardioid pickup pattern, the
LM-201 rejects background noise and room re-
verberation, improving gain-before-feedback more
than a microphone with a cardioid pattern.
See Fig. 1.
Polar pattern: Supercardioid. See Fig. 2.
Impedance: 150 ohms nominal (120 ohms actual),
balanced. Recommended minimum load impedance
1000 ohms.
Open-circuit sensitivity: 6.0 mV/Pa* (–44.5 dBV/Pa).
Power sensitivity: –42 dB re 1 mW/Pa*.
The LM-201 has a smooth, wide-range frequency
response for natural reproduction of the voice.
Low frequencies are filtered out to reduce pickup
of lectern thumps, room rumble, etc.
Equivalent noise level: 24 dB SPL typical (0 dB=.0002
dyne/cm2), A-weighted.
Frequency in Hz
The included wire-screen grille has a two-stage
pop filter to reduce pickup of explosive breath
sounds. An external foam windscreen is supplied
for extra pop rejection or for outdoor use. The base
and mic capsule are shock-mounted to attenuate
handling noise and lectern thumps.
S/N ratio: 70 dB at 94 dB SPL.
Maximum SPL: 120 dB SPL for 3% THD.
Polarity: Positive pressure on the diaphragm produces
a positive voltage on XLRM pin 2 with respect to
pin 3.
Fig. 2
Polar Response
Operating voltage:
Option 1: Phantom power, 12 to 48 volts DC, positive
voltage on output pins 2 and 3 with respect to pin 1.
Option 2: 12-24 DC power supplied by a separate
AC/DC adapter (not supplied). You select this option
by moving jumpers inside the electronics module
(instructions inside cover).
Operating temperature range: –20° to +50° C, or –4°
to +122° F.
The microphone output is balanced, low imped-
ance, which allows long cable runs without hum
pickup or high-frequency loss.
Two finishes are available: black (model
LM-201P) or brown (model LM-201B).
Operating Instructions
The LM-201 comes in two parts: a microphone/
swivel mount and an electronics module.
Current drain: 5.8 mA.
Mounting
Materials: Polycarbonate swivel mount and ball, steel
tube and grille, steel electronics module.
1. Using the swivel mount as a template, mark and
drill three 1/8-inch-diameter (3.175-mm) holes for
the mounting screws (supplied).
Finish: Black (LM-201P) or brown (LM-201B).
Cables: Grey, permanently attached, 2-conductor
shielded cable, terminated with spade lugs for con-
nection to electronics module. Six-and-one-half feet
(2 meters) long from swivel mount to spade lugs.
Black, permanently attached, 2-conductor shielded
cable, 18 inches (0.5 meters) long, with 3-pin male
XLR audio connector.
Weight (microphone and cable only): 10.2 ounces
(288.3 grams).
Weight (microphone, cable, and electronics module):
18.2 ounces (515 grams).
NOTE: Your pulpit might already have mount-
ing holes that fit the LM-201. If these holes are
oriented opposite to those in the LM-201 base,
simply remove the Phillips pan-head screw from
the side of the base and align the holes in the base
with those in the pulpit. Then, rotate the boom arm
180°, reinsert the pan-head screw into the hole
in the side of the base and mount the base to the
pulpit.
Fig. 3a
16.00"
(40.6 cm)
Dimensions: See Figs. 3a, 3b and 3c.
Included accessories: Foam windscreen, Crown part
number WS-8.
Optional accessories: PH-1A phantom power supply
(1 ch., battery or AC adapter powered).
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.
2. Drill a ½-inch-diameter (12.7-mm) hole in the
lectern top in the center of the three 1/8-inch-diam-
eter (3.175-mm) holes. The microphone cable will
run through this hole. Alternatively, you can run
the cable along the top of the lectern and down the
side, so that no cable hole is needed.
1.15"
(2.9 cm)
3.15"
(8.0 cm)
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