2
STAGE MONITOR & P.A. LOUDSPEAKER PLACEMENT
For maximum rejection of unwanted sound, place the
stage monitor(s) or P.A. system loudspeaker at a 60° angle
from the rear of the BETA 58A, not directly behind it. See
Figure 1. Always check out the stage setup before a perfor-
mance to ensure that microphone and monitor placement is
optimum.
180°
120°120°
90°
0°
P.A. SYSTEM
LOUDSPEAKER
MONITOR
LOUDSPEAKER(S)
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.
0.6 m
(2 FT)
51 mm
(2 IN.)
25 mm
(1 IN.)
3 mm
(1/8 IN.)
500 1,000 2,000 5,000 10,000 20,00050 100 20020
0
–10
+10
TYPICAL FREQUENCY RESPONSE
FIGURE 2
Polar Pattern
Supercardioid, rotationally symmetrical about microphone
axis, uniform with frequency (see Figure 3)
120o
150o
150o
120o
180o
150o
120o
150o
120o
180o
60o
90o
30o
30o
60o
–5 dB
–10 dB
–15 dB
–20 dB
90o
30o
60o
90o
30o
60o
90o
–5 dB
–10 dB
–15 dB
–20 dB
00
10000 Hz
6300 Hz
2500 Hz
1000 Hz
500 Hz
250 Hz
TYPICAL POLAR PATTERNS
FIGURE 3
Output Level (at 1,000 Hz)
Open Circuit Voltage: –51.5 dBV/Pa* (2.6 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. See Figure 4.
INTERNAL WIRING
FIGURE 4
Case
Silver blue enamel-painted die cast metal with hardened,
matte-finished, spherical steel mesh grille
Adjustable, Stand Adapter
Slip-in microphone mounting, unbreakable, adjustable
through 180° with standard 5/8”-27 thread, black finish
Dimensions (See Figure 5)
160 mm
(6.5 in.)
50 mm
(2 in.)
OVERALL DIMENSIONS
FIGURE 5
Net Weight
278 grams (9.92 oz)
Certification
Eligible to bear CE Marking. Conforms to European EMC
Directive 89/336/EEC. Meets applicable tests and perfor-
mance 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
Windscreen A58WS Series (8 colors available). . . . . . . . . .
Isolation Mount A55M, A55HM. . . . . . . . . . . . . . . . . . . . . . .
7.6 m (25 ft.) Cable C25E, C25F. . . . . . . . . . . . . . . . . . . . . .
REPLACEMENT PARTS
Cartridge R176. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grille Assembly RK265G. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plug (Connector) Assembly 90F1984. . . . . . . . . . . . . . . . . .