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222 HARTREY AVE.. EVANSTON, IL. 60204 U.S.A.
I
DATA
MODEL SR112B AND SR116B
AREA CODE 312/866-2200
.
CABLE: SHUREMICRO
SHEET
SPEAKER SYSTEMS
TWX: 910-231.0048
TELEX: 72-4381
I
OPERATION AND SERVICE INSTRUCTIONS
MODEL SR112B SPEAKER SYSTEM
FIGURE 1
DESCRIPTION
The Shure Model SR112B and SR116B Speaker Sys-
tems are compact, rugged, heavy-duty, two-way units.
They are designed for use with Shure Model SR105 or
similar high-power amplifiers in studio monitor, night
club or other applications requiring a small, wide range
speaker system. When properly installed and connected,
the SR112B and SR116B will provide outstanding per-
formance in critical applications due to their wide fre-
quency response, low distortion, and smooth dispersion
characteristics. The Speakers have a nominal impedance
of 8 ohms and are designed to operate with amplifiers
capable of delivering up to 100 watts to an 8-ohm load.
They can be used either direct-coupled or with a con-
stant-voltage 25-volt line, or 70-volt line using a Shure
A1 02A Transformer.
Quality sound reproduction is achieved through the use
of two 8-inch heavy-duty speakers and a high-frequency
driver coupled to a 120" radial horn. The front-ported
bass reflex design of the enclosure provides low-frequen-
cy enhancement. A built-in series-type passive crossover
network provides 6 dB per octave rolloff for the low-
frequency speakers and 18 dB per octave rolloff for the
high-frequency driver. A four-position attenuator switch
allows high-frequency level adjustments of -4,
-2,
0
and
+2
dB.
The SR112B (see Figure 1) is a weather-resistant unit,
and is designed for permanent installation either indoors
or in a protected outdoor environment such as under the
roof of an open pavilion. Adhesives used in the SR112B
are moisture-resistant, and trim and fastening hardware
have a high corrosion resistance.
The SR116B is a portable unit (see Figure 2), and is de-
signed for temporary installation either indoors or in a
MODEL SR116B SPEAKER SYSTEM
FIGURE 2
protected outdoor environment. The SR116B is supplied
with a 15m (50 ft), 18-gauge, rubber-jacketed connecting
cable with locking phone plugs, and a black vinyl grille
cover. The corners of the SR116B are equipped with steel
protectors. A retractile handle and balanced design
contribute to ease of transporting.
Both units are constructed of 15.9 mm
( 5 h
in.) wood,
and covered in black, scuff-resistant, textured vinyl. The
attractive black sculptured fabric grille is rugged, clean-
able, and replaceable if damaged. The radial horn and
baffle board assembly is ruggedly constructed of shock-
resistant thermoplastic resin. Molded feet protect sur-
faces and permit stacking.
The SR112B and SR116B may be operated vertically on
their own feet, or in a tilted position using an appropriate
support. The Shure A112A Tilt Bracket and the A112D
Wall Mount Swivel Bracket provide for tilting on a hori-
zontal surface or wall or ceiling mounting. A slip-on
protective cover (Model A112C) is also available.
SPECIFICATIONS
Power Rating
. . . .
.
.
. . .
Maximum recommended ampli-
fier output to 8 ohms: 100
Watts continuous,
28 Vrms,
48V peak
Power Load for
Constant-Voltage
Operation
. .
. .
.
.
. . .
.78 watts (25-volt input, 8 ohms)
Impedance
. . .
.
.
.
. . . .
. 8 ohms nominal (see Figure 3)
Frequency Response
.
. 4 5 Hz - 16 kHz (see Figure 4)
Crossover Frequency
.
,2600 Hz; high frequency: 18 dB/
octave rolloff; low frequency:
6 dB/octave rolloff
High-Frequency
Attenuator
. . . . . .
.
.
. 2 dB steps ( + 2 to - 4)
C o p y r i g h t 1980. Shure Brothers
inc.
27Al631 (TG)
Printed i n U.S.A.
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