Crown Audio LM-201 specifications Features, Operating Instructions, Mounting, Specifications

POLAR

PATTERN

SUPERCARDIOID CONDENSER

LECTERN MICROPHONE

LM-201

he Crown® LM-201 is a professional- Tquality, supercardioid electret condenser

microphone designed for use on lecterns, 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

Features
•	Built-in shock mount attenuates thumps	•	Smooth, natural sound quality
•	Rugged ball-and-socket swivel adjusts silently	•	Built-in pop filter and supplied foam wind-
•	Supercardioid polar pattern reduces feedback		screen reduce breath pops

conventional gooseneck microphones. Swivel mo- tion 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 re- verberation, 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 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 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.

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.

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.

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 (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.

Current drain: 5.8 mA.

Materials: Polycarbonate swivel mount and ball, steel tube and grille, steel electronics module.

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):

18.2ounces (515 grams). 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.

Fig. 1

Frequency Response

Frequency in Hz

Fig. 2

Polar Response

Fig. 3a

16.00"

(40.6 cm)

1.15"

(2.9 cm) 3.15"

(8.0 cm)