SC-312X
Cinema Loudspeaker System
Features
• Passive, 2-way, screen channel system
• SC-312X provides 90° horizontal by +15° to -35° 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-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 low-
frequency system.
Specifications
Nominal Coverage
Frequency Range
Impedance
SC-312X
90° horizontal x +15 to -35° vertical
33 Hz – 16 kHz (-6 dB)
8Ω
Sensitivity 1 watt/1 meter,
half space
95 dB
Maximum Input Power1
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.
2 hours of 6 db crest factor
pinknoise, 50 Hz – 20 kHz,
AES method
150 W RMS
Recommended Amplifier Power 300 W RMS maximum
Recommended Processing
Connectors
Subsonic filter below 30 Hz, > 18 dB per octave
LF-3115
HF-63X1
Barrier strip screw terminals
accept up to #10 AWG
stranded wire
Barrier strip screw terminals
accept up to #10 AWG
stranded wire
Transducers
One 15" (381mm) high efficiency,
extended bass woofer featuring a
3" copper voice coil
1.5" (38mm) exit, 2.5" titanium
diaphragm compression driver
Enclosure
Quasi B4 alignment, ported
Tilt/Pan Bracket
10° vertical tilt
10° horizontal pan
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.
enclosure with fully flared ports,
symmetrical port design, tuned to
36 Hz, constructed of MDF and
heavily braced. Features vandal
resistant woofer mounting bolts
Dimensions (HWD)
18.5" x 30" x 20.3"
(470 mm x 762 mm x 516 mm)
16" x 30" x 20"
(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
System Weight
Baffle Cut-Out
83 lb (38 kg)
123 lb (56.4 kg)
35.5" x 32"
40 lb (18.4 kg)
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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