User's Manual

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 +15 to -35° 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 accept up to #10 AWG
stranded wire stranded wire
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 +15° to -35° 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