Crown LM-201 Datasheet

LM-201
LM-201L
T
he Crown ® LM-201 and LM-201L are
professional-quality, supercardioid
electret condenser microphone designed
for use on lecterns, pulpits, or similar applica-
tions.
The LM-201 is available in two lengths LM-201
has an 16 inch (40.6 cm) arm and the LM-201L
has a 24 inch (61 cm) arm. (See Figure 3a.)
The microphone is easily installed with the
included mounting screws. As it is swiveled to
the desired position, adjustment is far quieter
than conventional gooseneck microphones.
Swivel motion is limited to prevent cable
damage. The LM-201 is rugged and is built to
withstand daily use.
Because of its supercardioid pickup pattern,
the LM-201 rejects background noise and
room reverberation, improving gain-before-
feedback more than a microphone with a
cardioid pattern.
The LM-201 has a smooth, wide-range fre-
quency response for natural reproduction of
the voice. Low frequencies are filtered out to
reduce pickup of lectern thumps, room
rumble, etc.
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.
The microphone output is balanced, low im-
pedance, which allows long cable runs without
hum pickup or high-frequency loss.
Two finishes are available: black (model LM-
201 and LM-201PL) or brown (model LM-
201B).
Operating Instructions
The LM-201 comes in two parts: a micro-
phone/swivel mount and an electronics mod-
ule.
Mounting:
1. Using the swivel mount as a template, mark
and drill three 1 / -inch-diameter (3.175-mm)
8
holes for the mounting screws (supplied).
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.
SUPERCARDIOID CONDENSER
LECTERN MICROPHONE
Specifications
Type: Unidirectional condenser.
Element: Electret condenser.
Frequency response (typical): 100 Hz to 15,000 Hz. 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*.
Equivalent noise level: 24 dB SPL typical (0 dB=.0002
dyne/cm 2 ), A-weighted.
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.
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 such as Crown PS-24. You select this
option by moving jumpers inside the electronics
module (instructions inside cover).
Current drain: 5.8 mA.
Materials: Polycarbonate swivel mount and ball, steel
tube and grille, steel electronics module.
Finish: Black (LM-201) or brown (LM-201B).
Cables: Grey, permanently attached, 2-conductor
shielded cable, terminated with spade lugs for
connection 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): LM-201: 10.2
ounces (288.3 grams). LM-201L: 12.3 ounces (348.7
grams).
Weight (microphone, cable, and electronics module):
LM-201: 18.2 ounces (515 grams). LM-201L: 20.3
ounces (575.4 grams).
Dimensions: See Figs. 3a, 3b and 3c.
Included accessories: Foam windscreen, Crown part no
WS-8.
Optional accessories: PH-1A phantom power supply
(1 ch., battery or AC adapter powered), PH-4B
phantom power supply (4 ch., AC powered).
*1 Pascal = 10 dynes/cm 2 = 10 microbars = 94 dB SPL.
Fig. 1
Frequency Response
Frequency in Hz
Fig. 2
Horizontal-Plane Polar Response
Fig. 3a
16.00" *
(40.6 cm)
1.15"
(2.9 cm)
3.15"
(8.0 cm)
* The LM-201L has a 24 inch (61 cm) arm.