Crown LM-201 Quick Start Manual

LM-201
T
he Crown ® LM-201 is a professional-
quality, supercardioid electret con-
denser microphone designed for use
on lecterns, pulpits, or similar applications.
The microphone is easily installed with
wood screws or bolts. As it is swiveled to
the desired position, adjustment is far qui-
eter than conventional gooseneck micro-
phones. 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
frequency 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 explo-
sive breath sounds. An external foam
windscreen is supplied for extra pop rejec-
tion 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
impedance, which allows long cable runs
without hum pickup or high-frequency loss.
Two finishes are available: black (model LM-
201) or brown (model LM-201B).
Operating Instructions
The LM-201 comes in two parts: a micro-
phone/swivel mount and an electronics
module.
Mounting:
1. Using the swivel mount as a template,
mark and drill three 1 / -inch-diameter
8
(3.175-mm) holes for the mounting screws
(supplied).
Your pulpit might already have mounting
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.
2. Drill a ½-inch-diameter (12.7-mm)hole in
the lectern top in the center of the three
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): 10.2 ounces
(288.3 grams).
Weight (microphone, cable, and electronics module):
18.2 ounces (515 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 / -
8
*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)