SR-18
Cinema Surround Loudspeaker
Features
• Parallel outputs for feeding additional units
• 95˚ horizontal dispersion
• QuickMount bracket for fast, easy and secure installation
• High-power handling capability and rugged plywood enclosure
optimized for digital soundtrack reproduction
• THX™ approved for professional cinema applications
Developed specifically for the unique requirements
of professional motion picture playback, QSC
extends its commitment to the cinema market with
the introduction of the SR-18 Cinema Surround
Loudspeaker. As a member of QSC’s DCS Digital
Cinema Speaker Series, the SR-18 offers high-power
handling, excellent sensitivity, and extended bass
response in a very compact enclosure.
Specifications
Frequency Range1
-6 dB half space
40 Hz – 20 kHz
-10 dB half space
Nominal Coverage
Directivity Index
36 Hz – 20 Hz
95° horizontal x 85° vertical (averaged from 1 kHz to 10 kHz, -6 dB)
7.5 dB
5.6
Q
Maximum Output2
Calculated Peak at Rated Power
Calculated Continuous
Impedance
118 dB
112 dB
The SR-18 Cinema Surround Loudspeaker features a
high-power, long-throw 8" low frequency transducer
coupled with a 1" titanium diaphragm compression
driver. The system’s plywood enclosure features a
15º down angle baffle and Array Optimized Tuning
(AOT) for optimum frequency response. The 100 watt
continuous power rating and sophisticated crossover
provides absolute reliability.
8Ω nominal
Maximum Input Power3
100 hours of 6 db crest factor
IEC 268 noise spectrum
85 W RMS
100 W RMS
2 hours of 6 db crest factor
pink noise, 50 Hz – 20 kHz,
AES method
Recommended Amplifier Power
Sensitivity 1 watt/1 meter, half space
Crossover Frequency
200 W RMS maximum into 8Ω
92 dB
2.8 kHz
Recommended Processing
Connectors
Subsonic filter at 50 Hz as provided by QSC DCA amplifiers
Barrier strip screw terminals accept up to #10 AWG stranded wire
The compact black enclosure with black grille blends
into any theatre decor. A new QuickMount bracket
design allows for fast, easy and secure installation. The
loudspeaker half of the bracket comes pre-installed on
each SR-18. The QuickMount wall bracket is purchased
separately to allow shipment to the job site ahead
of the loudspeakers. A traditional U-bracket is also
available in lieu of the QuickMount bracket system.
Transducers
8" long throw low-frequency transducer
1" titanium diaphragm compression driver on a CD horn
Enclosure
Plywood, baffle angle is 15° downward
20.5" x 12" x 11.75" (522 mm x 305 mm x 299 mm)
24 lb (11 kg)
Dimensions (HWD)
Weight – Net
1) All frequency ranges specified refer to measured free field response (half space, 2π).
2) Calculated SPL at 1m, (half space, 2π), speaker operating at rated RMS power with pink noise within specified frequency range.
3) Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.
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