QSC SC-423 Manual de Usario

QSC Vocero SC-423

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Developed specifically for the unique requirements
of professional motion picture playback, the SC-423
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-423 is a three-way, selectable bi or tri-amplified
screen channel loudspeaker system comprised of two
main units—the MH-1063 mid-high frequency system
and the LF-4215 low-frequency system.
The MH-1063 mid-high system features a high
output, horn loaded 10" midrange cone driver and
a 2.5 (63mm) titanium diaphragm compression "
driver mounted to an adjustable pan and tilt bracket.
The MH-1063 includes a driver protection network
and a passive crossover for bi-amp operation. Power
limiter circuitry protects the high-frequency driver
from overpowering. The MH-1063 provides extended
frequency coverage for the critical midrange band. 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 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 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-423 is designed for ease of installation.
The MH-1063 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the MH-1063 to the top of the
LF-4215 enclosure.
SC-423
Cinema Loudspeaker System
Specifications SC-423
Nominal Coverage 90° horizontal x +20 to -30° vertical
Frequency Range 32 Hz - 16 kHz (-6 dB)
Crossover Frequency 250 and 1700 Hz, 24 dB per octave
LF-4215 MH-1063
Impedance 4 8Ω Ω
Sensitivity 1 watt /1 meter, 99.5 dB Bi-amp Tri-amp
half space 105 dB MF 105 dB HF 107.5 dB
Maximum Input Power1
8 hours of 6 db crest factor 800 W RMS 250 W RMS2 275 W RMS 60 W RMS
IEC 268 noise spectrum
2 hours of 6 db crest factor 1000 W RMS 350 W RMS
pink noise, 50 Hz - 20 kHz,
AES method
Recommended Amplifier Power 1600 W RMS maximum 800 W RMS maximum
Recommended Processing Subsonic filter below 30 Hz, 4th order LR crossover at 200 and
> 18 dB per octave 1700 Hz via QSC DCM or QSControl.net
Connectors Barrier strip screw terminals Barrier strip screw terminals
accept up to #10 AWG stranded accept up to #10 AWG stranded wire
wire, four terminals; two inputs
and two parallel outputs
Transducers Two 15" (381mm) high efficiency, 10" high efficiency mid range,
extended bass woofer featuring 1.5" (38mm) exit, 2.5" titanium
4" copper voice coils diaphragm compression driver
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) 36" x 30" x 20.3" 39" x 30" x 20"
(910 mm x 762 mm x 516 mm) (990 mm x 762 mm x 508 mm)
Weight - Net 172 lbs (78 kg) 85 lbs (39 kg)
System Weight 257 lbs (117 kg)
Baffle Cut-Out 76" 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.
2) Maximum input power tested in accordance with IEC 268-5 recommendations, 200 Hz - 2 kHz band limiting, 6 dB signal crest factor.
passive
mid-high
Features
• Three-way selectable, bi or tri- amplified screen channel system
• MH-1063 provides 90° horizontal by +20° to -30° vertical coverage
• LF-4215 is constructed of MDF and is heavily braced
• Low-distortion waveguides provide highly articulate dialogue
• Shallow depth (20") facilitates installation
• THX™ approved for professional cinema applications
THX is a trademark of THX Ltd.
SC-423
Dimensions
qscaudio.com
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-423 Spec Sheet - 02/22/06
Top
Side
21.7"
551 mm
20.3"
515 mm
30"
762 mm
Front
75"
1900 mm
18.9"
480 mm
39"
990 mm
36"
910 mm
4"
102 mm
*TD-000180-00*
Cinema Mid-High Loudspeaker System User Manual
MH-1063 10” (254mm) mid, 2.5” (63mm) compression driver
MH-1075 10” (254mm) mid, 3.0” (75mm) compression driver
Introduction
The MH-1063 and MH-1075 “mid-high packs” provide the mid and high frequency
components of three-way screen channel loudspeaker systems for high performance
cinema applications. They were designed to operate with and be directly mounted on
QSC’s cinema low frequency enclosures.
Mid frequencies are reproduced with a 10” (254mm) high-efficiency, phase-ring
loaded driver mounted on a custom designed cinema horn. The high-frequency driver
is a large format, 2.5” (63mm, MH-1063) or 3.0” (75mm, MH-1075) titanium dia-
phragm compression driver mounted on a custom high-frequency cinema horn. The
high frequency horn is a low-distortion waveguide providing highly articulate dialogue
without coloration associated with conventional horn loudspeakers. Both horns fea-
ture broad horizontal and vertical coverage angles to ensure coverage of every seat in
the auditorium. The driver assemblies are mounted on an adjustable pan and tilt
bracket that has an integral aiming sight, simplifying installation.
The MH-1063 and MH-1075 loudspeakers include a driver protection and crossover
network to assure reliable operation. DC blocking capacitors protect against DC or
low-frequency signals that could damage an unprotected driver. Power limiter circuitry
protects the driver from over-powering and an 18dB/octave crossover seamlessly
blends the high and mid frequency elements. Outboard processing is required to form
the crossover between the LF and MH loudspeakers.
Bi-amp or tri-amp operation is possible using a selector switch mounted on the con-
nections panel. The bi-amp setting provides a passive crossover network between mid
and high drivers. Separate amplifiers and an active crossover are required for the low
frequency channel and the mid-high channel. Tri-amp setting disables the internal
mid-high crossover and each driver is driven independently by its own amplifier and
active crossover; one for the low, one for the mid, and one for the high frequencies.
The MH-1063 and MH-1075 components come pre-assembled to reduce field assem-
bly time. Three bolts are all that are required to secure the mid-high assembly to the
top of a QSC low frequency enclosure.
Install in accordance with QSC Audio Product’s instructions and a
licensed, professional engineer. Only use attachments, mounts,
accessories, or brackets specified by QSC Audio Products, Inc. Refer
all servicing to qualified personnel. Servicing is required when the
apparatus has been damaged in any way.
WARNING! Before placing, installing, rigging, or suspending any
speaker product, inspect all hardware, suspension, cabinets, trans-
ducers, brackets and associated equipment for damage. Any missing,
corroded, deformed or non-load rated component could significantly
reduce the strength of the installation, placement, or array. Any such
condition severely reduces the safety of the installation and should
be immediately corrected. Use only hardware which is rated for the
loading conditions of the installation and any possible short-term
unexpected overloading. Never exceed the rating of the hardware or
equipment. Consult a licensed, professional engineer when any
doubt or questions arise regarding a physical equipment installation. TD-000180-00 rev.A
© Copyright 2004, QSC Audio Products, Inc.
QSC® is a registered trademark of QSC Audio Products, Inc.
“QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office
1675 MacArthur Blvd., Costa Mesa, CA, 92626 USA
Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079
Customer Service(714) 957-7150 or toll free (USA only) (800) 772-2834

Especificaciones del producto

Marca: QSC
Categoría: Vocero
Modelo: SC-423

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