QSC Audio Cinema Surround Loudspeaker SR-18 User Manual

Sr-18, Cinema surround loudspeaker

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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

8Ω 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 8Ω

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, 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.

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

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