QSC SR-18 User Manual

Cinema Loudspeaker Systems User Manual

SR-18 

Surround Loudspeaker

Introduction

The SR-18 Cinema Surround Loudspeaker offers high power handling, excellent sensitivity, and 

extended bass response in a very compact enclosure. The high power handling and rugged plywood 

enclosure are optimized for the task of digital soundtrack reproduction.

Instead of being tuned as an individual unit, the SR-18 features Array Optimized Tuning (AOT).  The 

crossover is voiced for flat low frequency response when used in an array on a theatre wall. Conven-

tional loudspeakers are voiced as a single unit.

The SR-18 features a high power long-throw 8” (203mm) low frequency transducer for smooth, 

extended bass response. The high frequency section combines a 1” (25mm) titanium diaphragm com-

pression driver with a constant directivity horn for very high output capability and wide, even high 

frequency coverage. The 100 watt continuous power rating provides absolute reliability.

The compact black enclosure with black grille blends into any theatre decor. The baffle’s built-in 15° 

tilt places the loudspeaker at the optimum coverage angle for most applications. The Quick Mount 

bracket design allows for fast installation. The loudspeaker-half of the bracket comes pre-installed 

on each SR-18. The Quick Mount wall bracket is purchased separately to allow shipment to the job 

site ahead of the loudspeakers. A U-bracket is also available in lieu of the Quick Mount bracket sys-

tem.

SR-18 Specifications 

(subject to change without notice)

Frequency Response:

40 - 20,000 Hertz (-6 dB, half space)

36 - 20,000 Hertz useable range (-10 dB, half space)

Nominal Coverage:

95° horizontal X 85° vertical (average from 1000 to 10,000 Hertz) 

DI:

7.5

Q:

5.6

Maximum Output:

112 dB

Impedance: 

8 ohms

Maximum Input Power (AES):

100 watts

Sensitivity (2.83V, 1m): 

92.0 dB

Crossover Frequency:

2,800 Hertz

Recommended Processing:

QSC amplifier

with

subsonic filter at 50 Hertz

Connectors:

Four terminal barrier strip. Outputs in parallel with inputs.

Transducers:

8” (203mm) woofer, 1” (25mm) Ti compression driver on CD horn.

Enclosure:

Painted plywood, 15° baffle

Size:

20.54” H x 12.00” W x 11.75” D (521.6mm x 304.8mm x 298.5mm)

Weight:

24 lbs. as hung (11 kg.)

Optional Brackets:

Quick Mount: QM-SW (0° tilt) or QM-BW (8° tilt)

U-bracket: YM-300

*TD-000203-00*

TD-000203-00 rev.B

© Copyright 2005, QSC Audio Products, Inc.

QSC® is a registered trademark of QSC Audio Products, Inc.

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