QSC SC-412 Handleiding

QSC Speaker SC-412

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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 low-
frequency 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 low-
frequency response required for cinema applications.
The LF-4115 covers the frequency range from
35 Hz to 1000 Hz, depending upon the high-
frequency 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.
SC-412
Cinema Loudspeaker System
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 4 8Ω Ω
Sensitivity 1 watt /1 meter, 93.5 dB 107.5 dB
half space
Maximum Input Power1
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
accept up to #10 AWG stranded accept up to #10 AWG stranded
wire, four terminals; two inputs wire, four terminals; two inputs
and two parallel outputs and two parallel outputs
Transducers One 15" (381mm) high efficiency, 1.5" (38mm) exit, 3" titanium
extended bass woofer featuring a diaphragm compression driver
4" 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 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.
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
• Shallow depth (20") facilitates installation
SC-412
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-412 Spec Sheet - 02/22/06
Top
Side
21.53"
546.9 mm
20.25"
514.4 mm
30"
762 mm
Front
33.83"
859.3 mm
15.46"
392.6 mm
18.38"
466.8 mm
9.7"
246.4 mm
4"
101.6 mm
20.25"
514.4 mm
*TD-000149-00*
Cinema Loudspeaker Systems User Manual
HF-75 High Frequency Component
Introduction
The HF-75 is the high frequency component of the SC-412 and SC-422 two-
way, biamplified screen channel loudspeakers for high performance cinema
applications. The system is shipped as two separate components: the HF-75
high frequency system and the LF-4115 or LF-4215 woofer system.
The HF-75 high-frequency system features a large format, 3” (75mm) tita-
nium diaphragm compression driver mounted on a custom designed high-
frequency cinema horn with an adjustable pan and tilt bracket. The horn fea-
tures broad horizontal and vertical coverage angles to ensure coverage of
every seat in the auditorium. The horn is a low-distortion waveguide provid-
ing highly articulate dialogue without the “honky” coloration associated
with conventional horn loudspeakers.
The HF-75 includes a driver protection and equalization network. DC block-
ing capacitors protect against DC or low-frequency signals that would likely
destroy an unprotected driver. Power limiter circuitry protects the driver from
over-powering and a response correction filter smoothes the frequency
response of the horn/driver combination. The driver and equalization net-
work provides for more reliable operation, ensuring the show will go on.
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 low
frequency enclosure.
Mounting
Refer to the illustration for mounting information. The HF-75 attaches to the
top of the LF-4115 or LF-4215 with three 5/16-18 bolts, 0.75” long, with lock
washers. We recommend the use of serviceable thread locking compound
when installing the bolts to prevent loosening due to vibration. Aim the horn
in the horizontal plane (pan) before tightening. Adjust the vertical tilt with
the bracket adjustment.
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. Ser-
vicing 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, cab-
inets, transducers, 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, profes-
sional engineer when any doubt or questions arise regarding
a physical equipment installation. TD-000149-00 rev.D
© Copyright 2003, 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

Product specificaties

Merk: QSC
Categorie: Speaker
Model: SC-412

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