QSC Audio HF-63X1 User Manual
Features
• Passive,2-way,screenchannelsystem
• SC-312Xprovides90°horizontalby+15°to-35°verticalcoverage
• Lowdistortionwaveguideprovideshighlyarticulatedialogue
• Shallowdepth(20")facilitatesinstallation
SC-312X
Cinema Loudspeaker System
Developed specifically for the unique requirements
of professional motion picture playback, the SC-312X
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-312X is a passive, 2-way, screen channel
loudspeaker system comprised of two main units—the
HF-63X1 high frequency system and the LF-3115 lowfrequency system.
The HF-63X1 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-63X1 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 lowfrequency response required for cinema applications.
The LF-3115 covers the frequency range from
35 Hz to 1000 Hz, depending upon the highfrequency system requirements.
Specifications SC-312X
Nominal Coverage 90° horizontal x +15 to -35° vertical
Frequency Range 33 Hz – 16 kHz (-6 dB)
Impedance 8Ω
Sensitivity 1 watt /1 meter, 95 dB
half space
Maximum Input Power1
2 hours of 6 db crest factor 150 W RMS
pinknoise, 50 Hz – 20 kHz,
AES method
Recommended Amplifier Power 300 W RMS maximum
Recommended Processing Subsonic filter below 30 Hz, > 18 dB per octave
LF-3115 HF-63X1
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)
The SC-312X is designed for ease of installation.
The HF-63X1 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the HF-63X1 to the top of the
LF-3115 enclosure.
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.
SC-312X
Dimensions
Top
21.53"
546.9 mm
20.25"
514.4 mm
30"
762 mm
Front
Side
20.25"
514.4 mm
4"
101.6 mm
9.7"
246.4 mm
15.46"
392.6 mm
33.83"
859.3 mm
18.38"
466.8 mm
Specifications subject to change without notice.
QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and other countries.
All other trademarks are the property of their respective owners. Patents may apply or be pending.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
SC-312X Spec Sheet – 06/20/08
qscaudio.com
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