QSC SC-312 - Manual
QSC SC-312 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Developed specifically for the unique requirements
of professional motion picture playback, the SC-312
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-312 is a 2-way, bi-amplified screen channel
loudspeaker system comprised of two main units—the
HF-63 high-frequency system and the LF-3115 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-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.
The SC-312 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-3115 enclosure.
SC-312
Cinema Loudspeaker System
Specifications
SC-312
Nominal Coverage
90° horizontal x +20 to -30° vertical
Frequency Range
33 Hz – 16 kHz (-6 dB)
Crossover Frequency
1000 Hz, 24 dB per octave
LF-3115
HF-63
Impedance
8
Ω
8
Ω
Sensitivity 1 watt /1 meter,
95.5 dB
107.5 dB
half space
Maximum Input Power
1
8 hours of 6 db crest factor
300 W RMS
40 W RMS
IEC 268 noise spectrum
2 hours of 6 db crest factor
400 W RMS
60 W RMS
pinknoise, 50 Hz – 20 kHz,
AES method
Recommended Amplifier Power 600 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
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)
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.
Features
• 2-way, bi-amplified screen channel system
• SC-312 provides 90° horizontal by +20° to -30° vertical coverage
• Low distortion waveguide provides highly articulate dialogue
• Shallow depth (20
"
) facilitates installation
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