QSC SR-18 Specification Sheet
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.
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.
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.
SR-18
Cinema Surround Loudspeaker
Specifications
Frequency Range
1
-6 dB half space
40 Hz – 20 kHz
-10 dB half space
36 Hz – 20 Hz
Nominal Coverage
95° horizontal x 85° vertical (averaged from 1 kHz to 10 kHz, -6 dB)
Directivity Index
7.5 dB
Q
5.6
Maximum Output
2
Calculated Peak at Rated Power
118 dB
Calculated Continuous
112 dB
Impedance
8
Ω
nominal
Maximum Input Power
3
100 hours of 6 db crest factor
85 W RMS
IEC 268 noise spectrum
2 hours of 6 db crest factor
100 W RMS
pink noise, 50 Hz – 20 kHz,
AES method
Recommended Amplifier Power
200 W RMS maximum into 8
Ω
Sensitivity 1 watt /1 meter, half space 92 dB
Crossover Frequency
2.8 kHz
Recommended Processing
Subsonic filter at 50 Hz as provided by QSC DCA amplifiers
Connectors
Barrier strip screw terminals accept up to #10 AWG stranded wire
Transducers
8" long throw low-frequency transducer
1" titanium diaphragm compression driver on a CD horn
Enclosure
Plywood, baffle angle is 15° downward
Dimensions (HWD)
20.5" x 12" x 11.75" (522 mm x 305 mm x 299 mm)
Weight – Net
24 lb (11 kg)
1) All frequency ranges specified refer to measured free field response (half space, 2
π
).
2) Calculated SPL at 1m, (half space, 2
π
), 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.
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