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Figure 7—Directivity vs. Frequency
(anechoic environment)
Specifications
Typical Axial Frequency Response,
Swept Sine Wave, 4 volts at 3.05 meters
(10 feet), (anechoic environment,
normalized for 1 watt at 1 meter; see
Figure 1):
68-20,000 Hz
Low-Frequency 3-dB-Down Point:
68 Hz
Usable Low-Frequency Limit (10-dB-
down point):
53 Hz
Efficiency:
2.9%
Long-Term Average Power-Handling
Capacity per EIA Standard RS-426A
(see Power-Handling section):
250 watts
Maximum Woofer Acoustic Output:
7.3 watts
Sensitivity (SPL at 1 watt, 1 meter
input, anechoic environment, swept
sine wave):
97 dB
Dispersion Angle Included by 6-dB-
Down Points on Polar Responses,
Indicated One-Third-Octave Bands of
Pink Noise (see Figure 6),
2,500-20,000 Hz, Horizontal:
60° (+16°, –15°)
SPEAKERS—Portables
S12 Two-Way Stage Speaker System
2,500-20,000 Hz, Vertical:
40° (+11°, –8°)
Directivity Factor R
16,000-Hz Median (see Figure 7):
18.2 (+17.5, –13.0)
Directivity Index D
Median (see Figure 7):
12.6 dB (+2.9 dB, –5.4 dB)
Distortion, 0.1 Full Power Input,
(see Figure 2)
Second Harmonic,
100 Hz:
–31 dB, 2.9%
1,000 Hz:
–48 dB, 0.4%
10,000 Hz:
–20 dB, 9.8%
Third Harmonic,
100 Hz:
–38 dB, 1.3%
1,000 Hz:
–36 dB, 1.6%
10,000 Hz:
–37 dB, 1.4%
Transducer Complement,
Low-Frequency:
SG12 12-inch woofer
High Frequency:
DH2010A driver
HP64M constant-directivity horn
a MARK IV company
600 Cecil Street, Buchanan, MI 49107
800/234-6831, 616/695-6831, 616/695-1304 Fax
Box Tuning Frequency:
(Q), 800- to
Crossover Frequency:
θ θ θ θ θ
Crossover Slope:
, 800- to 16,000-Hz
i
Impedance,
Input Connections:
Enclosure Materials and Colors:
Dimensions (see Figure 4),
Net Weight:
Shipping Weight:
Optional Accessory:
63 Hz
3,000 Hz
12 dB per octave
Nominal:
8 ohms
Minimum:
6.8 ohms
Two parallel 1/4-inch phone jacks
(Two parallel Neutrik Speakon
NL4MP connectors on S12-E)
Black-carpeted Road-Wood
Black perforated metal grille
Height:
727 mm (28.7 in.)
Width:
429 mm (16.9 in.)
Depth:
403 mm (15.9 in.)
22.7 kg (50 lb)
25.9 kg (57 lb)
100BK mounting stand
Part Number 533654 – 9639
®
TM
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