SC-312

Cinema Loudspeaker System

Features

2-way, bi-amplified screen channel system

SC-312 provides 90° horizontal by +20° to -30° vertical coverage

Low distortion waveguide provides highly articulate dialogue

Shallow depth (20") facilitates installation

Developed specifically for the unique requirements of professional motion picture playback, the SC-312 extends QSC’s commitment to the cinema market. As a member of the DCS Digital Cinema Speaker Series, the SC-312 is a 2-way, bi-amplified screen channel loudspeaker system comprised of two main units—the HF-63 high-frequency system and the LF-3115 low- frequency system.

The HF-63 high-frequency system features a 2.5" (63mm) titanium diaphragm compression driver mounted on a custom designed high frequency cinema horn with an adjustable pan and tilt bracket. The HF-63 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 smoothes the frequency response of the horn/ driver combination. The driver and equalization network provides for more reliable operation, ensuring the show will go on.

The LF-3115 15" (381mm) low-frequency enclosure is designed specifically to address the extended low- frequency response required for cinema applications. The LF-3115 covers the frequency range from 35 Hz to 1000 Hz, depending upon the high- frequency system requirements.

The SC-312 is designed for ease of installation. The HF-63 components come pre-assembled to reduce field assembly time. Three bolts are all that are required to secure the HF-63 to the top of the LF-3115 enclosure.

Specifications

SC-312

 

 

 

 

Nominal Coverage

90° horizontal x +20 to -30° vertical

 

 

 

 

Frequency Range

33 Hz – 16 kHz (-6 dB)

 

 

 

 

Crossover Frequency

1000 Hz, 24 dB per octave

 

 

 

 

 

LF-3115

HF-63

 

 

 

Impedance

8Ω

8Ω

 

 

 

Sensitivity 1 watt /1 meter,

95.5 dB

107.5 dB

half space

 

 

 

 

 

Maximum Input Power1

 

 

8 hours of 6 db crest factor

300 W RMS

40 W RMS

IEC 268 noise spectrum

 

 

2 hours of 6 db crest factor

400 W RMS

60 W RMS

pinknoise, 50 Hz – 20 kHz,

 

 

AES method

 

 

Recommended Amplifier Power

600 W RMS maximum

100 W RMS maximum

 

 

 

Recommended Processing

Subsonic filter below 30 Hz,

4th order LR crossover at 1000 Hz

 

> 18 dB per octave

 

 

 

 

Connectors

Barrier strip screw terminals

Barrier strip screw terminals

 

accept up to #10 AWG

accept up to #10 AWG

 

stranded wire

stranded wire

 

 

 

Transducers

One 15" (381mm) high efficiency,

1.5" (38mm) exit, 2.5" titanium

 

extended bass woofer featuring a

diaphragm compression driver

 

3" copper voice coil

 

 

 

 

Enclosure

Quasi B4 alignment, ported

Tilt/Pan Bracket

 

enclosure with fully flared ports,

±10° vertical tilt

 

symmetrical port design, tuned to

±10° horizontal pan

 

36 Hz, constructed of MDF and

 

 

heavily braced. Features vandal

 

 

resistant woofer mounting bolts

 

 

 

 

Dimensions (HWD)

18.5" x 30" x 20.3"

16" x 30" x 20"

 

(470 mm x 762 mm x 516 mm)

(406 mm x 762 mm x 508 mm)

 

 

 

Weight – Net

83 lb (38 kg)

40 lb (18.4 kg)

 

 

 

System Weight

123 lb (56.4 kg)

 

 

 

 

Baffle Cut-Out

35.5" x 32"

 

1) Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.

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QSC Audio SC-312 specifications Features, Specifications

SC-312 specifications

The QSC Audio SC-312 is a renowned loudspeaker that exemplifies high performance in professional audio applications. Designed to address the needs of both live sound reinforcement and fixed installation, the SC-312 combines innovative engineering with robust construction, ensuring reliability and excellence in audio reproduction.

At its core, the SC-312 features a three-way design that incorporates a 12-inch LF driver, a 6.5-inch MF driver, and a 1.75-inch compression driver. This configuration allows for precise sound reproduction across a wide frequency range, making it ideal for various applications, from music concerts to corporate events. The low-frequency driver delivers powerful bass response, while the mid-range driver ensures clarity and detail in vocals and instruments. The high-frequency compression driver provides smooth high-end performance, allowing for crystal-clear audio even at higher volume levels.

One of the standout features of the SC-312 is its advanced waveguide technology. This design enables controlled directivity, ensuring that sound is evenly distributed throughout the listening area. This is particularly beneficial in larger venues, where even coverage is essential for the audience to experience consistent audio quality. The waveguide technology also minimizes distortion and phase cancellation, resulting in a more natural sound that enhances the listening experience.

The SC-312 is constructed using high-quality materials, including a rugged enclosure designed to withstand the rigors of touring and installation. The cabinet is made from durable plywood and features a weather-resistant finish, making it suitable for outdoor use. Additionally, the loudspeaker is equipped with multiple mounting options, allowing for versatile installation configurations.

In terms of connectivity, the SC-312 offers both professional and consumer-friendly options, including Speakon and ¼-inch inputs. This versatility makes it easier for audio professionals to integrate the speaker into existing sound systems. The speaker’s impedance is rated at 8 ohms, which allows for compatibility with a wide range of amplifiers.

In summary, the QSC Audio SC-312 is a powerful and reliable loudspeaker that delivers exceptional audio performance. With its three-way design, waveguide technology, durable construction, and flexible connectivity options, it meets the demands of a variety of audio applications. Whether in live sound settings or permanent installations, the SC-312 stands out as a leading choice for professionals seeking quality and durability in loudspeakers.