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Developed specifically for the unique requirements
of professional motion picture playback, the SC-322X
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-322X is a passive, two-way screen channel
loudspeaker system comprised of two main units—the
HF-63X2 high-frequency system and the LF-3215 low-
frequency system.
The HF-63X2 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-
63X2 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-322X is designed for ease of installation.
The HF-63X2 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the HF-63X2 to the top of the
LF-3215 enclosure.
SC-322X
Cinema Loudspeaker System
Specifications SC-322X
Nominal Coverage 90° horizontal x +20 to -30° vertical
Frequency Range 32 Hz - 16 kHz (-6 dB)
Impedance 4Ω
Sensitivity 1 watt /1 meter, 97.5 dB
half space
Maximum Input Power
1
2 hours of 6 db crest factor 300 W RMS
pink noise, 50 Hz - 20 kHz,
AES method
Recommended Amplifier Power 600 W RMS maximum
Recommended Processing Subsonic filter below 30 Hz, > 18 dB per octave
LF-3215 HF-63X2
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 LF-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.
Features
• Passive, two-way, screen channel system
• HF-63X2 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