Shure M545SD Certification Optional Accessories, Architects Specifications, Furnished Accessory

Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 (with respect to pin 3). See Figure 4.

Switch

Built-in magnetic reed on/off switch with lockplate. To lock switch in the ON position, remove screw on lockplate and turn lockplate 180°. Reassemble and tighten screw.

Cartridge Shock Mount

Internal rubber vibration-isolator

Swivel Adapter

Positive action, adjustable through 90° from vertical to horizon- tal, permits easy removal for handheld use, suitable for mount- ing on stand with 5/8"–27 thread

Case

Chrome-plated die casting with ARMO-DUR®grille and stain- less steel screen

Dimensions

See Figure 5

Net Weight (less cable)

255 grams (9 oz)

CERTIFICATION

OPTIONAL ACCESSORIES

Line Matching Transformer	A95 Series
Desk Stand	S37A, S39A
Isolation Mount	A55M
Dual Mount	A26M
Windscreen	A2WS-GRA
Cable, LO–Z (7.6 m [25 ft])	C25J
Cable, HI–Z (6.1 m [20 ft])	C20HZ
ARCHITECTS' SPECIFICATIONS

The microphone shall be a moving coil (dynamic) type with a frequency response of 50 to 15,000 Hz. The unit shall have a cardioid polar characteristic. The cancellation at the sides shall be approximately 6 dB, and the cancellation at the rear shall be 15 to 20 dB. The microphone shall be dual impedance with a rated impedance of 150 ohms for connection to microphone inputs rated at 19 to 300 ohms and “High” for connection to high-impedance microphone inputs. lmpedance change shall be solderless at the microphone connector.

The microphone output shall be:
Low lmpedance	-58.0 dB
(0 dB = 1 volt per Pascal)
High lmpedance	-35.0 dB
(0 dB = 1 volt per Pascal)

Eligible to bear CE Marking. Conforms to European EMC Directive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments.

FURNISHED ACCESSORY

Swivel Adapter A25D

REPLACEMENT PARTS

Cartridge	R45
Plug Element	RK169P
Screen and Grille	RPM210

The microphone shall have an XLR, three-pin professional audio connector and shall be equipped with a magnetic reed On-Off switch.

The microphone shall be provided with a swivel adapter, adjustable through 90° from vertical to horizontal, and suitable for mounting on a stand having a 5/8"–27 thread.

The overall dimensions of the microphone shall be 157 mm (6-3/16 in.) in length and 31.9 mm (1 1/4 in.) in diameter.

The microphone shall be the Shure Model 545SD-LC or equivalent.

	180o		180o
150o	150o	150o	150o

dB

+10				120o		120o	120o		120o
0
				90o	--20 dB	90o	90o		90o
--10								--20 dB
					--15 dB			--15 dB
				60o	--10 dB	60o	60o	--10 dB	60o
20	2	3 4 5 6 789	2 3 4 5 6 789	30o	--5 dB		30o	--5 dB
	50 100	1000	10000 20000		30o			30o
					0			0
		Hz			125 Hz			2000 Hz
	TYPICAL FREQUENCY RESPONSE				500 Hz			4000 Hz
					1000 Hz			8000 Hz

FIGURE 2	TYPICAL POLAR PATTERNS
	FIGURE 3

REED	CARTRIDGE	TRANSFORMER	XLR CONNECTOR
SWITCH

CODED TERMINAL

GREEN GREEN BLACK

YELLOWYELLOW

BLACK

RED

BLUE

WHITE

BLACK

32 mm (1 1/4 in.)

IMPEDANCE SELECTION SOCKET (SHOWN IN LOW IMPEDANCE POSITION)

	157 mm
	(6 3/16 in.)
64 mm	94 mm
(2 1/2 in.)	(3 11/16 in.)

23 mm (15/16 in.)

INTERNAL CONNECTIONS

FIGURE 4

OVERALL DIMENSIONS

FIGURE 5

2