QSC SR-18 Manual

QSC Højttaler SR-18

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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: 52 - 20,000 Hertz (-6 dB, 4 pi)

48 - 20,000 Hertz useable range (-10 dB, 4 pi)

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

DI: 7.5

Q: 5.6

SPL Output: 112 dB continous

Impedance: 8 ohms

Maximum Input Power: 100 watts (2 hours IEC 268, 50 - 20,000 Hertz)

Sensitivity (2.83V, 1m): 91.0 dB

Crossover Frequency: 1,900 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.C

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

“QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office

1675 MacArthur Blvd., Costa Mesa, CA, 92626 USA

Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079

Customer Service(714) 957-7150 or toll free (USA only) (800) 772-2834

Connections

The SR-18 has barrier strip screw terminals that accept up to #10 AWG stranded loudspeaker wire.

Input- Connect the amplifier’s output signal to the loudspeaker’s INPUT terminals. Observe proper polarity. Use the largest wire size and shortest

length for the application.

Output- The SR-18 has two terminals marked OUTPUT. These terminals are connected in parallel to the INPUT terminals and can be used for con-

necting multiple SR-18 enclosures in parallel with one another. Connect the OUTPUT terminals to the next loudspeaker’s INPUT terminals. Observe

proper polarity of connections.

Warnings and Important Notes

NOTE! Maintain proper loudspeaker connection polarity throughout the entire system for maximum performance.

NOTE! Ensure that the amplifier driving the parallel loudspeakers is rated to drive the lower impedance (Example: 4 enclo-

sures in parallel will yield 2 ohms impedance, nominally).

Use QSC’s Quick Mount bracket for wall mounting or U-bracket for wall mounting. Enclosure is not designed to be sus-

pended, flown, or rigged by any other method. Do not suspend, fly, or rig this enclosure.

Always keep sound pressure levels in the listening area below levels that can damage human hearing.

Install in accordance with QSC Audio Product’s instructions and a licensed, professional engineer. Only use attachments,

mounts, accessories, or brackets specified by QSC Audio Products, Inc. Refer all servicing to qualified personnel. Servicing

is required when the apparatus has been damaged in any way.

WARNING! Before placing, installing, rigging, or suspending any speaker product, inspect all hardware, suspension, cabi-

nets, transducers, brackets and associated equipment for damage. Any missing, corroded, deformed or non-load rated com-

ponent could significantly reduce the strength of the installation, placement, or array. Any such condition severely reduces

the safety of the installation and should be immediately corrected. Use only hardware which is rated for the loading condi-

tions of the installation and any possible short-term unexpected overloading. Never exceed the rating of the hardware or

equipment. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment

installation.

Warranty (USA only; other countries, see your dealer or distributor)

Disclaimer

QSC Audio Products, Inc. is not liable for any damage to amplifiers, or any other equipment that is caused by negligence or improper installation

and/or use of this loudspeaker product.

QSC Audio Products 3 Year Limited Warranty

QSC Audio Products, Inc. (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period of three (3) years

from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal

installation and use - provided the unit is returned to our factory or one of our authorized service stations via pre-paid transportation with a copy of