Cinema Loudspeaker System SC-434 Features

SC-434
Cinema Loudspeaker System
SC-434
Features
•4-way selectable, tri or quadamplified screen channel
system
•Unique HF/VHF diaphragm
has less mass than traditional
diaphragms resulting in exceptional dynamic range,
extended high-frequency
response and lower distortion
•LF-4315 is constructed of MDF
and features single woofer
chambers
•Low-distortion waveguides
provide highly articulate
dialogue
•Shallow depth (20”) facilitates
installation
•THX™ approved for
professional cinema
applications
Developed specifically for the unique
requirements of professional motion
picture playback, the SC-434 extends QSC’s
commitment to the cinema market. As a
member of the DCS Digital Cinema Speaker
Series, the SC-434 is a 4-way, selectable
tri or quad-amplified screen channel
loudspeaker system comprised of two main
units–the MHV-1090 high-frequency system
and the LF-4315 low-frequency system.
The MHV-1090 mid-high-very high
system features a high output, horn
loaded 10” midrange cone driver and a
coaxial neodymium high-frequency/very
high-frequency compression driver. The
MHV-1090 includes a driver protection
network and a passive crossover for tri-amp
operation. The protection circuitry prevents
low-frequency signals from damaging the
high-frequency and very high-frequency
driver. A high power 10” cone driver
allows operation as low as 250 Hz and the
advanced phase plug coupling permits a
crossover point of up to 1800 Hz to the
high-frequency horn. This ensures that
most of the dialog range is reproduced by a
single element, for unmatched intelligibility.
The coaxial neodymium high-frequency/very
high-frequency compression driver provides
a dramatic improvement in dynamic
response, clarity and transparency. The
annular high-frequency diaphragm covers
the frequency range between 1800 and
7000 Hz with a smooth, linear response.
The large diaphragm excursion of +/-0.8
mm results in high output and increased
power handling. The very high-frequency
driver covers the frequency range from
7000 to 22,000 Hz and eliminates the
dome break up of conventional drivers that
can cause resonance and harsh, metallic
sound.
The LF-4315 triple 15” (381 mm) lowfrequency enclosure is designed specifically
to address the extended low-frequency
response required for cinema applications.
The LF-4315 covers the frequency range
from 35 Hz to 250 Hz. 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-434 is designed for ease of
installation. The MHV-1090 components
come pre-assembled to reduce field
assembly time. Three bolts are all that are
required to secure the MHV-1090 to the
top of the LF-4315 enclosure.
SC-434 Details
Specifications
SC-434
Nominal Coverage
90° horizontal x +20 to -30° vertical
Frequency Range
33 Hz – 16 kHz (-6 dB)
Crossover Frequency
250, 1700 and 6000 Hz, 24 dB per octave
LF-4315
MHV-1090
Impedance
5.5Ω
MF: 8Ω HF: 8Ω VHF: 8Ω
Sensitivity 1 watt /1 meter, half space
99.5 dB
Tri-amp
MF:105 dB
HF/VHF: 110 dB
Quad-amp
MF 105 dB
HF/VHF: 110 dB
VHF: 110 dB
1200 W RMS
MF: 275 W RMS
HF/VHF: 230 W RMS
MF: 275 W RMS
HF 150 W RMS
VHF: 80 W RMS
Maximum Input Power1
8 hours of 6 dB crest factor IEC 268
noise spectrum
2 hours of 6 dB crest factor pink noise, 1500 W RMS
50 Hz – 20 kHz, AES method
MF: 800 W RMS
HF/VHF: 500 W RMS maximum
Recommended Amplifier Power
2400 W RMS maximum
MF: 800 W RMS
HF: 500 W RMS
VHF: 300 W RMS maximum
Recommended Processing
Subsonic filter below 30 Hz, > 18 dB per octave
4th order LR crossover at 250, 1700 and 6000 Hz via QSC processor
Connectors
Barrier strip screw terminals accept up to #10 AWG stranded wire
Transducers
Three 15” (381mm) high efficiency, extended bass woofers featuring 4” MF: 10” high-efficiency, horn-loaded cone with phase plug
copper voice coils
HF/VHF: coaxial neodymium compression driver with 3.5” (90 mm)
HF diaphragm and 1.75” (44 mm) VHF diaphragm
Enclosure
Quasi B4 alignment, ported enclosure with fully flared ports, symmetrical Tilt/Pan Bracket
port design, tuned to 36 Hz, constructed of MDF and heavily braced.
±10°vertical tilt
Features vandal resistant woofer mounting bolts
±10° horizontal pan
Dimensions (HWD)
53” x 30” x 20.3” (910 mm x 762 mm x 516 mm)
39” x 30” x 20” (990 mm x 762 mm x 508 mm)
Weight – Net
260 lb (118 kg)
84 lb (38.5 kg)
System Weight
344 lb (155.5 kg)
1) Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.
SC-434 Technical Drawing
Top
21.7"
551 mm
20.3"
516 mm
30"
762 mm
39"
990 mm
92"
2337 mm
4"
102 mm
Side
53"
1346 mm
36"
914 mm
Front
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
© 2013 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent
and Trademark office and other countries.
SC-434 Spec Sheet 02/06/2013
please recycle