The UK's leading Integrator and Equipment
Installer for the Digital Cinema Industry


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Founded over four decades ago, QSC Audio Products, LLC, is a globally recognized leader in the design and manufacture of professional audio system solutions. Sound Associates have been specifying and installing QSC amplifiers for use in cinemas large and small for many years and now with Q-Sys we continue to deliver high quality cinema sound.

QSC introduced a full range of cinema speakers and Sound Associates is proud to have carried out all of the UK installations of their stage, sub-bass and surround speakers. The range now includes digital signal processing (DSP) and, again, Sound Associates have carried out numerous installations, both here in the UK as well as overseas.

In 2016 QCS acquired Ultra-Stereo Labs, Inc. (USL) allowing them to offer an industry-leading porfolio of sound processing solutions for the motion picture exhibition industry.


Developed specifically for the unique requirements of professional motion picture playback, the SC-222 extends QSC’s commitment to the cinema market. As a member of the DCS Digital Cinema Speaker Series, the SC-222 is a bi-amplified, 2-way screen channel loudspeaker system comprised of two main units—the HF-75C high-frequency system and the LF-2215 low-frequency system.

The HF-75C high-frequency system features a 3” (75mm) titanium diaphragm compression driver mounted on a custom designed high-frequency cinema horn with an adjustable pan and tilt bracket. The HF-75C includes a driver protection and equalization network. DC blocking capacitors protect against DC or low frequency signals that would likely destroy an unprotected driver. Power limiter circuitry protects the driver from overpowering and a response correction filter smooths the frequency response of the horn/driver combination. The driver and equalization network provides for more reliable operation, ensuring the show will go on. LF-2215 dual 15” (381 mm) low-frequency enclosure is designed specifically to address the extended low frequency response required for cinema applications.

LF-2215 covers the frequency range from 37 Hz to 1000 Hz, depending upon the high-frequency system requirements. Close Coupled Woofers (CCW), with their tight spacing between woofers, improves coupling and keeps coverage angles wide over a greater frequency range than more widely spaced designs.

The SC-222 is designed for ease of installation. The HF-75C components come pre-assembled to reduce field assembly time. Three bolts are all that are required to secure the HF-75C to the top of the LF-2215 enclosure.


  • Two-way, bi-amplified screen channel system
  • HF-75C provides 90° horizontal by +20° to -35° vertical coverage
  • LF-2215 is constructed of MDF and features single woofer chambers
  • Low-distortion waveguide provides highly articulate dialogue
  • Shallow depth (20”) facilitates installation behind the screen

Download Datasheet

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