Cinema Surround Loudspeaker

SR-18

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.

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.

Specifications

Frequency Range1
-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 Output2
Calculated Peak at Rated Power	118 dB
Calculated Continuous	112 dB

Impedance	8Ω nominal

Maximum Input Power3
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.

SR-18 specifications

The QSC Audio SR-18 is a professional-grade loudspeaker designed to deliver exceptional sound performance in a variety of settings, from live concerts to studio monitoring. This versatile speaker is engineered to produce high-quality audio with clarity and precision, making it a popular choice for audio professionals and enthusiasts alike.

At the heart of the SR-18 is its advanced driver technology. The speaker features an 18-inch high-excursion bass driver, which provides deep, powerful low frequencies. This is complemented by a built-in 1.4-inch titanium diaphragm compression driver for superior high-frequency response. Together, these drivers create a full-range sound that is rich and dynamic, capable of handling diverse music genres and sound systems.

One of the main features of the QSC SR-18 is its robust construction. The enclosure is built from premium plywood and finished with a durable black texture that not only enhances the aesthetic appeal but also ensures the speaker can withstand the rigors of road use. The cabinet design includes an acoustic port that minimizes distortion and enhances bass response, allowing for a more cohesive audio experience.

The SR-18 also incorporates advanced technologies for optimal performance. It boasts QSC’s unique waveguide technology, which provides even sound dispersion and minimizes beaming. This results in a broader listening area, allowing audiences to enjoy consistent sound quality regardless of their position relative to the speaker.

For versatility, the QSC SR-18 is equipped with multiple input options, including XLR and ¼-inch connectors, making it compatible with a wide range of audio equipment. Additionally, the speaker is designed with user-friendly features such as a top-mounted handle for easy transport and built-in rigging points for secure installation.

In terms of specifications, the QSC SR-18 delivers impressive performance ratings, including a high sensitivity level that ensures efficient power usage and extended linearity in sound reproduction. This makes it suitable for both passive and active applications, providing users with flexibility in setup configurations.

Overall, the QSC Audio SR-18 stands out for its combination of powerful sound output, durable design, and innovative technologies. Whether used for concert settings, corporate events, or permanent installations, the SR-18’s capabilities make it a reliable choice for delivering exceptional audio experiences. Its versatility, performance, and robust build ensure it remains a favorite among sound professionals seeking quality and reliability in their audio solutions.