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SC-422 Cinema Loudspeaker System
Developed specifically for the unique requirements of professional motion picture playback,
the SC-422 extends QSC's commitment to the cinema market. As a member of the DCS
Digital Cinema Speaker Series, the SC-422 is a two-way, bi-amplified screen channel
loudspeaker system comprised of two main units - the HF-75 high-frequency system
and the LF-4215 low-frequency system.
The HF-75 high-frequency system features a large format, 3" (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-4215 dual 15" (381mm) low-frequency enclosure is designed specifically
to address the extended low-frequency response required for cinema applications. The
LF-4215 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-422 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-4215 enclosure.
FEATURES
- Two-way, bi-amplified screen channel system
- HF-75 provides 90° horizontal by +20° to -30° vertical coverage
- LF-4215 is constructed of MDF and features single woofer chambers
- Low-distortion waveguide provides highly articulate dialogue
- Shallow depth (20") facilitates ease of installation
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DCS SERIES
DOCUMENTS
SC-422 Specifications (PDF 535K)
SC-422 User Manual (PDF 2.9MB)
HI-RES IMAGE
SC-422
CAD DRAWINGS
SC-422 (DXF, zipped 125K)
HF-63 (DXF, zipped 115K)
LF-4215 (DXF, zipped 36K)
RELATED PRODUCTS
DCA Series 2-Channel Amplifiers
DCA Series 4-Channel Amplifiers
DCM Digital Cinema Monitor
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SPECIFICATIONS |
SC-422 |
| Nominal Coverage |
90° horizontal by +20 to -30° vertical |
| Frequency Range (-6 dB) |
38 Hz -16 kHz |
| Crossover Frequency |
700 Hz, 24 dB per octave |
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LF-4215 |
HF-75 |
| Impedance |
4 ohms |
8 ohms |
| Sensitivity 1 watt/1 meter, half space |
99.5 dB |
107.5 dB |
Maximum Input Power 1
(8 hours of 6 dB crest factor
IEC 268 noise spectrum)
(2 hours of 6 dB crest factor pinknoise, 50 Hz - 20 kHz, AES method)
Recommended Amplifier Power |
800 watts RMS
1000 watts RMS
1600 watts RMS maximum |
60 watts RMS
80 watts RMS
100 watts RMS maximum |
| Recommended Processing |
Subsonic filter below 30 Hz, >18 dB per octave |
4th order LR crossover at 1000 Hz |
| Connectors |
Barrier strip screw terminals accept up to #10 AWG stranded wire |
Barrier strip screw terminals accept up to #10 AWG stranded wire |
| Transducers |
Two 15" (381mm) high efficiency, extended bass woofer featuring a 4" copper voice coil |
1.5" (38mm) exit, 3" titanium diaphragm compression driver |
| Enclosure |
Quasi B4 alignment, ported enclosure with fully flared ports, symmetrical port design, tuned to 36 Hz, constructed of MDF and heavily braced. Features vandal resistant woofer mounting bolts. |
Tilt/Pan Bracket
± 10º vertical tilt
± 10º horizontal pan |
| Dimensions |
30" wide x 36" high x 20.3" deep
(762mm x 910mm x 516mm) |
30" wide x 16" high x 20" deep
(762mm x 406mm x 508mm) |
| Net Weight |
172 lbs (78 kg) |
40 lbs (18.4 kg) |
| System Weight |
212 lbs (96.4 kg) |
| Baffle Cut-Out |
53" x 32" |
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1 Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz - 20 kHz band limiting, 6 dB signal crest factor.
Specifications subject to change without notice.
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