Stage Monitor & P.A. Loudspeaker Placement

STAGE MONITOR & P.A. LOUDSPEAKER PLACEMENT

For maximum rejection of unwanted sound, place the stage monitor or P.A. system loudspeaker at a 60° angle from the rear of the Beta 57A, not directly behind it (see Figure 1). Al- ways check out the stage setup before a performance to en- sure that placement of microphone and monitors is optimum.

MONITOR	180°
LOUDSPEAKER(S)	180°	P.A. SYSTEM
LOUDSPEAKER(S)		P.A. SYSTEM
		LOUDSPEAKER
120°		120°
90°		90°

0°

RECOMMENDED LOUDSPEAKER LOCATIONS

FIGURE 1

SPECIFICATIONS

Type

Dynamic (moving coil)

Frequency Response

50 to 16,000 Hz (see Figure 2)

NOTE: The curve below shows on–axis response at a distance of 2 feet from a uniform sound source. Your response may vary, depending on microphone position.

	+10	3 mm
		3 mm
		(1/8 IN.)
dB		25 mm
	0	(1 IN.)
	0	51 mm
		51 mm
		(2 IN.)
	–10	0.6 m
		0.6 m
		(2 FT)
	20	50	100	200	500	1,000	2,000	5,000	10,000	20,000
					Hz

TYPICAL FREQUENCY RESPONSE

FIGURE 2

Polar Pattern

Supercardioid, rotationally symmetrical about microphone axis, uniform with frequency (see Figure 3)

Output Level (at 1,000 Hz)

Open Circuit Voltage –51 dBV/Pa* (2.8 mV)

*1 Pa = 94 dB SPL

Impedance

Rated impedance is 150 W (290 W actual) for connection to microphone inputs rated low Z

Phasing

Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3

Connector

Three-pin professional audio connector (male XLR type)

Case

Silver blue enamel–painted die cast metal with hardened, matte-finished steel mesh grille

Adjustable Stand Adapter

Slip–in, adjustable through 180°, with standard 5/8”-27 thread

Net Weight

275 grams (9.6 oz)

Certification

Eligible to bear CE Marking. Conforms to European EMC Di- rective 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 ACCESSORIES

Adjustable Stand Adapter . . . . . . . . . . . . . . . . . . . . . . . A25D

5/8” to 3/8” (Euro) Thread Adapter . . . . . . . . . . . . . 95A2050 Storage Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A21

OPTIONAL ACCESSORIES

Locking Magnetic Windscreen . . . . . . . . . . . . . . . . A57AWS Isolation Stand Mount . . . . . . . . . . . . . . . . . . . A55M, A55HM 7.6 m (25 ft.) Cable . . . . . . . . . . . . . . . . . . . . . . . C25E, C25F

REPLACEMENT PARTS

Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R174

Grille Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RK320

Plug (Connector) Assembly . . . . . . . . . . . . . . . . . . . . 90F1984

250 Hz		2500 Hz
250 Hz		2500 Hz
500 Hz		6300 Hz
1000 Hz		10000 Hz

TYPICAL POLAR PATTERNS

FIGURE 3