Crown LM-201 User manual

LM-201
LM-201L
SUPERCARDIOID CONDENSER
LECTERN MICROPHONE
Horizontal-Plane Polar Response
Fig. 2
Fig. 3a
Fig. 1
Frequency Response
Frequency in Hz
The 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 1/8-inch-diameter (3.175-mm)
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.
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/cm2), 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/cm2= 10 microbars = 94 dB SPL. * The LM-201L has a 24 inch (61 cm) arm.
16.00" *
(40.6 cm)
1.15"
(2.9 cm)
3.15"
(8.0 cm)

LM-201
LM-201L
Crown International
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com
©2002 Crown Audio, Inc.
Specifications subject to change without prior
notice.
Crown®is a registered trademark of Crown Interna-
tional.
8/02 125958-4
Fig. 3c
LM-201/LM-201L Schematic
2. Drill a ½-inch-diameter (12.7-mm)hole in
the lectern top in the center of the three 1/8-
inch-diameter (3.175-mm) holes. The micro-
phone 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.
3. Using the supplied mounting screws and
washers, screw the swivel mount to the lectern
top. Tighten the mounting screws securely. Do
not overtighten. Some slight wobbling of the
base is normal when the microphone is
moved.
4. For unlimited microphone rotation, remove
the set screw in the base of the microphone.
Caution: If the boom arm is rotated fully
around, it may twist and damage the micro-
phone cable.
5. Using woodscrews, mount the base plate of
the electronics module inside the lectern or
wherever desired. You can remove the module
cover by undoing the screws on the side of the
module.
Powering: The LM-201 is factory set for use
with 12-48 volt phantom power. To change to
12-24 volt DC power, see instructions inside
electronics module cover.
Connections: Connect the LM-201 cable spade
lugs to the electronics module as shown in
Figure 3b. Plug mixer cable into the 3-pin XLRM
output connector (see Figure 3c).
Warning: Do not lubricate the microphone
swivel mount, as it may lose its friction and
not stay in place. Use only mild soap and
water to clean the microphone.
Tension Adjustment: If the swivel becomes
loose, remove the swivel mount from the
lectern and look under the mount. You’ll see a
ring with two holes 180 degrees apart. Place
the tips of a needlenose pliers in these holes,
and rotate the ring clockwise until the swivel is
sufficiently tight. Remount the unit.
Architects’ and Engineers’ Specifications
The microphone shall be the Crown model LM-
201 or equivalent. The microphone shall be a
supercardioid electret-condenser type with
shock-mounted capsule, a built-in shock-
mounted swivel mount and pop-filter grille.
Permanently attached to the microphone shall
be a 6.5-ft (2-m), two-conductor shielded
cable that connects to a supplied electronics
module. The output of the electronics module
shall have an 18-in. (0.5-m) microphone cable
terminated with an XLRM audio connector.
The microphone shall be powered from 12 to
48 volts phantom powering or 12-24 volts DC.
Frequency response shall be uniform from 100
Hz to 15,000 Hz. Open-circuit sensitivity shall
be 6.0 mV/Pa. Impedance shall be 150 ohms
balanced. Maximum SPL capability shall be
120 dB SPL at 3% THD. Equivalent noise shall
be 24 dBA typical (0 dB =.0002 dyne/cm2).
The LM-201 and LM201PL shall have a black
finish; the LM-201B shall have a brown finish.
The LM-201 has an 16 inch (40.6 cm) arm and
the LM-201L has a 24 inch (61 cm) arm.
The Crown Model LM-201, LM-201L or LM-
201PL microphone is specified.
Microphone Warranty
Crown professional microphones are guaran-
teed against malfunction for a period of three
years from date of original purchase. See en-
closed warranty sheet for additional informa-
tion.
Service
If the unit fails to work, replace or repair any
additional mic cables, or check the power
supply. If service is required, return both the
microphone and its interface in their original
packaging to Crown Factory Service, 1718
West Mishawaka Road, Elkhart, IN 46517.
For further assistance or technical support call
800-342-6939.
At the factory, the electronics module is
matched to your particular microphone’s
frequency response. If you determine that
just the microphone or the module needs
service, send both anyway. Then we can
match your electronics to your microphone.
The serial number is on both pieces.
3.055"
(7.8 cm)
1.950"
(4.95 cm)
1.250"
(3.2 cm)
3.500"
(8.9 cm)
2.00"
(5.1 cm)
2.80"
(7.1 cm)
Fig. 3b