QSC Audio SC-322 specifications

SC-322

Cinema Loudspeaker System

Features

•Two-way, bi-amplified screen channel system

•HF-63 provides 90° horizontal by +20° to -30° vertical coverage

•LF-3215 is constructed of MDF and features single woofer chambers

•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-322 extends QSC’s commitment to the cinema market. As a member of the DCS Digital Cinema Speaker Series, the SC-322 is a two-way, bi-amplified screen channel loudspeaker system comprised of two main units—the HF-63 high-frequency system and the LF-3215 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-3215 dual 15" (381mm) low- frequency enclosure is designed specifically to address the extended low-frequency response required for cinema applications.

The LF-3215 covers the frequency range from 35 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-322 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-3215 enclosure.

Specifications	SC-322
Nominal Coverage	90° horizontal x +20 to -30° vertical
Frequency Range	32 Hz - 16 kHz (-6 dB)
Crossover Frequency	1000 Hz, 24 dB per octave
	LF-3215	HF-63
Impedance	4Ω	8Ω
Sensitivity 1 watt /1 meter,	98.5 dB	107.5 dB
half space
Maximum Input Power1
8 hours of 6 db crest factor	600 W RMS	40 W RMS
IEC 268 noise spectrum
2 hours of 6 db crest factor	800 W RMS	60 W RMS
pink noise, 50 Hz - 20 kHz,
AES method
Recommended Amplifier Power	1200 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 stranded	accept up to #10 AWG stranded
	wire, four terminals; two inputs	wire, four terminals; two inputs
	and two parallel outputs	and two parallel outputs
Transducers	Two 15" (381mm) high efficiency,	1.5" (38mm) exit, 2.5" titanium
	extended bass woofer featuring	diaphragm compression driver
	3" copper voice coils
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)	36" x 30" x 20.3"	16" x 30" x 20"
	(910 mm x 762 mm x 516 mm)	(406 mm x 762 mm x 508 mm)
Weight - Net	172 lbs (78 kg)	40 lbs (18.4 kg)
System Weight	212 lbs (96.4 kg)
Baffle Cut-Out	53" 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.