QSC Audio SC-412 User Manual
Features
• Two-way, bi-amplified screen channel system
• SC-412 provides 90° horizontal by +20° to -30° vertical coverage
• Low-distortion waveguides provide highly articulate dialogue
SC-412
Cinema Loudspeaker System
• Shallow depth (20
") facilitates installation
Developed specifically for the unique requirements
of professional motion picture playback, the SC-412
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-412 is a two-way, bi-amplified screen channel
loudspeaker system comprised of two main units—the
HF-75 high-frequency system and the LF-4115 lowfrequency system.
The HF-75 high-frequency system features a 3" large
format (75mm) titanium diaphragm compression
driver mounted on a custom designed high-frequency
cinema horn with an adjustable pan and tilt bracket.
The HF-75 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-4115 15" (381mm) low-frequency enclosure
is designed specifically to address the extended lowfrequency response required for cinema applications.
The LF-4115 covers the frequency range from
35 Hz to 1000 Hz, depending upon the highfrequency system requirements.
The SC-412 is designed for ease of installation.
The HF-75 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the HF-75 to the top of the
LF-4115 enclosure.
Specifications SC-412
Nominal Coverage 90° horizontal x +20 to -30° vertical
Frequency Range 33 Hz - 16 kHz (-6 dB)
Crossover Frequency 700 Hz, 24 dB per octave
LF-4115 HF-75
Impedance 4Ω 8Ω
Sensitivity 1 watt /1 meter, 93.5 dB 107.5 dB
half space
Maximum Input Power
8 hours of 6 db crest factor 400 W RMS 60 W RMS
IEC 268 noise spectrum
2 hours of 6 db crest factor 500 W RMS 80 W RMS
pink noise, 50 Hz - 20 kHz,
AES method
Recommended Amplifier Power 800 W RMS maximum 100 W RMS maximum
Recommended Processing Subsonic filter below 30 Hz, 4th order LR crossover at 700 Hz
> 18 dB per octave
Connectors Barrier strip screw terminals Barrier strip screw terminals
Transducers One 15" (381mm) high efficiency, 1.5" (38mm) exit, 3" titanium
Enclosure Quasi B4 alignment, ported Tilt/Pan Bracket
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 lbs (38 kg) 40 lbs (18.4 kg)
System Weight 123 lbs (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.
1
accept up to #10 AWG accept up to #10 AWG
stranded wire stranded wire
extended bass woofer featuring a diaphragm compression driver
4" copper voice coil
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
SC-412
Dimensions
Top
21.53"
546.9 mm
20.25"
514.4 mm
30"
762 mm
Front
Side
20.25"
514.4 mm
101.6 mm
9.7"
246.4 mm
15.46"
392.6 mm
33.83"
4"
466.8 mm
859.3 mm
18.38"
Specifications subject to change without notice.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
SC-412 Spec Sheet - 03/10/06
qscaudio.com
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