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 in smaller cinemas, QSC extends its commitment to the cinema market with the introduction of the SC-2150 Screen Channel Loudspeaker. As a member of QSC’s DCS (Digital Cinema Speaker) Series, the SC-2150 offers high-power handling, excellent sensitivity, and extended bass response in a very compact enclosure.

The SC-2150 is a 3-way, selectable passive full-range or bi-amplified screen channel loudspeaker system comprised of two main units – the mid-high frequency system and the low-frequency enclosure. The components are easily assembled on-site via a pan and tilt bracket that mounts the mid-high components to the top of the LF enclosure.

The mid-high system features a high output, horn loaded 6.5"" midrange cone driver and a 1.4"" (35.6 mm) diaphragm compression driver mounted to an adjustable pan and tilt bracket. QSC's patented* CineSight simplifies aiming of the horns for proper audience coverage.

The dual 15"" (381 mm) low-frequency enclosure is designed specifically to address the extended low-frequency response required for cinema applications. The compact enclosure is only 14.5"" (368 mm) deep, reducing the space required behind the screen. The enclosure is constructed of high quality MDF panels and features Single Woofer Chambers (SWC, separate chambers for each transducer). In the rare event of a transducer theft or failure, this prevents over-excursion of the remaining transducer caused by improper box loading.

With Symmetrical Port Loading (SPL), bass ports are evenly spaced on each side of the transducers, making internal pressure more uniform across the back surface of the transducer. This prevents the cone from being displaced to one side or another by unbalanced forces, reducing the chance of driving the voice coil out of the center of the gap at high power.

The SC-2150 includes a driver protection network and a passive crossover for bi-amp and full passive operation. Power limiter circuitry protects the high-frequency and mid-frequency drivers from overpowering. A simple switch setting determines the operating mode and eliminates dual inventory and ordering issues associated with fixed bi-amp or passive models. The 3-way design provides exceptional coverage of the critical midrange band for improved dialog intelligibility.

The SC-2150 is designed for ease of installation. Three bolts are all that are required to secure the mid-high system to the top of the LF enclosure. A pre-wired harness and connector plugs into the terminal plate to provide all electrical connections to the mid-high system. Pre-installed rubber feet speed installation, thereby reducing labor costs.


  • Optimized design for smaller cinemas - up to 55 ft (16.6 m) in length.
  • 3-way selectable, bi-amplified or full passive screen channel system.
  • Heavily braced, MDF low-frequency enclosure for extended bass response.
  • 6.5"" horn loaded midrange driver provides highly articulate dialogue.
  • Shallow 14.5"" (368 mm) depth reduces space required behind the screen.
  • Advanced crossover circuitry protects the HF and MF drivers from over- powering and excessive low-frequency program material.

Download Datasheet

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