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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)
120
o
150
o
150
o
120
o
180
o
150
o
120
o
150
o
120
o
180
o
60
o
90
o
30
o
30
o
60
o
–5 dB
–10 dB
–15 dB
–20 dB
90
o
30
o
60
o
90
o
30
o
60
o
90
o
–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. . . . . . . . . . . . . . . . . .