QSC SC-443 Manuel utilisateur

Taper
Manuel utilisateur
Developed specifically for the unique requirements
of professional motion picture playback, the SC-443
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-443 is a three-way, selectable bi or tri-amplified
screen channel loudspeaker system comprised of
three main units—the MH-1075 high-frequency system
and dual LF-4215 low-frequency systems.
The MH-1075 mid-high system features a high
output, horn loaded 10" midrange cone driver and a
3" (75mm) titanium diaphragm compression driver
mounted to an adjustable pan and tilt bracket. The
MH-1075 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-1075 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
enclosures are designed specifically to address the
extended low-frequency response required for cinema
applications. The dual LF-4215s cover 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-443 is designed for ease of installation.
The MH-1075 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the MH-1075 to the top of the
LF-4215 enclosure.
SC-443
Cinema Loudspeaker System
Specifications SC-443
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
(2) LF-4215 MH-1075
Impedance 4
Ω each 8Ω
Sensitivity 1 watt /1 meter, 102.5 dB Bi-amp Tri-amp
half space 106 dB MF 105 dB HF 107.5 dB
Maximum Input Power
1
8 hours of 6 db crest factor 800 W RMS each 250 W RMS
2
275 W RMS 80 W RMS
IEC 268 noise spectrum
2 hours of 6 db crest factor 1000 W RMS each 350 W RMS
pink noise, 50 Hz - 20 kHz,
AES method
Recommended Amplifier Power 1600 W RMS maximum each 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 Four 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 ±1horizontal pan
36 Hz, constructed of MDF and
heavily braced. Features vandal
resistant woofer mounting bolts
Dimensions (HWD) 72" x 30" x 20.3" 39" x 30" x 20"
(1820 mm x 762 mm x 516 mm) (990 mm x 762 mm x 508 mm)
Weight - Net 344 lbs (156 kg) 85 lbs (39 kg)
System Weight 429 lbs (195 kg)
Baffle Cut-Out 111.6" 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-1075 provides 90° horizontal by +20° to -30° vertical coverage
LF-4215 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
THX is a trademark of THX Ltd.
SC-443
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-443 Spec Sheet - 02/22/06
Top
Side
21.7"
551 mm
20.3"
516 mm
30"
762 mm
Front
111"
2810 mm
36"
910 mm
39"
990 mm
72"
1820 mm
4"
102 mm
18.9"
480 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 Products 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
2
Settings
BI-AMP / TRI-AMP Operating Mode Selection
Set the operating mode selector switch to BI-AMP or TRI-AMP, depending on your application setup.
Mounting
Attaching to Low Frequency Enclosure
The mid-high loudspeaker assembly attaches to the top of the QSC low frequency cabinet with three 5/16-18 bolts, 0.75” long, with
lock washers. This hardware ships installed on the low frequency cabinet. We recommend the use of serviceable thread locking com-
pound when installing the bolts to prevent loosening due to vibration. Do not fully tighten the mounting hardware before aiming (see
below).
Aiming
Aim the horn in the horizontal plane (pan) before tightening the attachment hardware. Adjust the vertical tilt with the mid-high vertical
adjustment bracket. The mid-high assembly is equipped with an aiming sight to assist in achieving desired coverage quickly and easily.
For typical applications, the aim point should be the center seat in the back row of the auditorium. If the cinema screen has already
been installed, a flashlight placed at the desired aiming point can be seen through the screen perforations in a darkened auditorium.
Where the sight holes are located:
How to use the sights:
Aim point:
BI-AMP-When set to BI-AMP, the MH-1063 and MH-1075 accepts mid-
high frequency signals on one set of inputs and uses an internal crossover
network between the mid- and high-frequency drivers. The signal applied
to the mid-high loudspeaker assembly must not contain low-frequency
content (below 200 Hz).
TRI-AMP- When set to TRI-AMP, the MH-1063 and MH-1075 accepts
separate mid- and high-frequency signals on two sets of inputs. The inter-
nal crossover network is bypassed and only the protective circuitry for the
H.F. driver remains. Each of the driver’s signals must have the appropriate
signal processing before operating.
Do not connect amplifiers directly to the driver inputs!
Always use the input terminal strip.
3
Connections
INPUT Terminals
The MH-1063 and MH-1075 have barrier strip screw terminals that accept up to #10 AWG (5.3mm
2
) stranded loudspeaker wire.
Observe proper polarity. Use the largest wire size and shortest wire length for the application.
OUTPUT Terminals
The OUTPUT terminals are factory-connected to the drivers. These terminals should ONLY be connected to their respective driver. Do
not connect signals to these terminals as all protection and equalization circuitry will be bypassed.
NOTE! Maintain proper loudspeaker connection polarity throughout the entire system for maximum performance.
Do not apply full range signal to the MH-1063 / MH-1075! There is a mid-high passive crossover for bi-amp mode
only. There is no crossover connected when operating in tri-amp mode. A protection network is always active. All
required signal processing must be done before the signal is applied to the loudspeaker. Do not connect any sig-
nal to the upper sets of OUTPUT terminals.
BI-AMP mode connections- Ensure the mode switch is set to BI-AMP, connect the input to the MH-1063 / MH-1075 to the lower
set of input terminals marked “BI-AMP + -”.
BI-AMP Mode- one
amplifier channel is used
for the low frequency
cabinet and one amplifier
channel for the mid-high
assembly. The MH-1063 /
MH-1075 mode switch is
set to BI-AMP. Active
crossovers are used
before amplification. The
mid-high assembly pro-
vides a passive crossover
between the mid and
high frequency drivers.
4
Connections (continued)
TRI-AMP mode connections- When the mode switch is set to TRI-AMP, connect the high frequency signal to the terminals marked
INPUT HI + -” and the mid frequency signal to the terminals marked “INPUT MID + -”.
TRI-AMP Mode- one
amplifier channel is
used for the low fre-
quency cabinet, one
amplifier channel for
the mids, and one
amplifier channel for
the high frequencies.
The MH-1063 / MH-
1075 mode switch is
set to TRI-AMP,
bypassing the internal
mid-high passive cross-
over. Active or passive
crossovers are used
before amplification.
Power limiter and DC
blocking remain active.
5
MH-1063 Specifications (subject to change without notice)
Freq. Range 180 - 15k (-6dB, full space)
Nominal Coverage 90° horizontal X +20 to -30° vertical (50° total, adjustable mount provides for vertical plane adjustments.
The horizontal plane can be adjusted by altering mounting position on the low frequency enclosure before
tightening bolts.
DI: 9 dB (400 to 16k Hertz average)
Q: 8 (400 to 16k Hertz average)
Max. Output: [Tri-amp mode] Mid Freq. 135.5 dB SPL calculated peak, 1m, full space
[Tri-amp mode] High Freq. 131.5 dB SPL calculated peak, 1m, full space
[Bi-amp mode] 135 dB SPL calculated peak, 1m ,full space
Impedance: [Bi-amp mode] 8 ohms nominal
7.9 ohms minimum at 1500 Hertz
91 ohms maximum at 150 Hertz
Maximum Input Power [Tri-amp mode] Mid Freq. 275 W (AES method, 2 hrs.)
[Tri-amp mode] High Freq. 60 W (AES method, 2 hrs.)
[Bi-amp mode] 250 W (IEC method, 8 hrs.)
Sensitivity [Tri-amp mode] Mid Freq. 105 dB SPL, 1 watt, 1 meter
[Tri-amp mode] High Freq. 107.5 dB SPL, 1 watt, 1 meter
[Bi-amp mode] 135 dB SPL, 1 watt, 1 meter
Crossover Frequency [Tri-amp mode] 250 Hertz or higher, 24dB/octave and 1.7k Hertz, 24dB/octave
[Bi-amp mode] 250 Hertz or higher, 24dB/octave
Crossover Network 1.7k Hertz, 18 dB/octave electrical slope, HF driver power limiting circuit (never disrupts continuity). Swit-
chable operation between Bi-Amp and Tri-amp operation. Tri-amp setting removes crossover circuit from
signal, leaving power limiter and DC blocking capacitors.
Connectors Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals, two HF input and two
MF input (for Tri-amp mode operation).
Transducers MF: 10" high efficiency midrange, phase-ring loaded.
HF: 1.5" (38mm) exit, 2.5" (63.5mm) titanium diaphragm compression driver.
Mounting Hardware: Attaches to top of the low frequency cabinet using three 5/16”-18 x 3/4” long bolts.
Size 39” high x 30” wide x 20” deep (991 x 762 x 508mm)
Weight 85 lb. (39 kg) net
6
MH-1075 Specifications (subject to change without notice
Freq. Range 180 - 15k (-6dB, full space)
Nominal Coverage 90° horizontal X +20 to -30° vertical (50° total, adjustable mount provides for vertical plane adjustments.
The horizontal plane can be adjusted by altering mounting position on the low frequency enclosure before
tightening bolts.
DI: 9 dB (400 to 16k Hertz average)
Q: 8 (400 to 16k Hertz average)
Max. Output: [Tri-amp mode] Mid Freq. 135.5 dB SPL calculated peak, 1m, full space
[Tri-amp mode] High Freq. 133 dB SPL calculated peak, 1m, full space
[Bi-amp mode] 135.5 dB SPL calculated peak, 1m ,full space
Impedance: [Bi-amp mode] 8 ohms nominal
6.4 ohms minimum at 1500 Hertz
91 ohms maximum at 150 Hertz
Maximum Input Power [Tri-amp mode] Mid Freq. 275 W (AES method, 2 hrs.)
[Tri-amp ode] High Freq. 80 W (AES method, 2 hrs.)
[Bi-amp mode] 250 W (IEC method, 8 hrs.)
Sensitivity [Tri-amp mode] Mid Freq. 105 dB SPL, 1 watt, 1 meter
[Tri-amp mode] High Freq. 108 dB SPL, 1 watt, 1 meter
[Bi-amp mode] 135.5 dB SPL, 1 watt, 1 meter
Crossover Frequencies [Tri-amp mode] 250 Hertz or higher, 24dB/octave and 1.7k Hertz, 24dB/octave
[Bi-amp mode] 250 Hertz or higher, 24dB/octave
Crossover Network 1.7k Hertz, 18 dB/octave electrical slope, HF driver power limiting circuit (never disrupts continuity). Swit-
chable operation between Bi-Amp and Tri-amp operation. Tri-amp setting removes crossover circuit from
signal, leaving power limiter and DC blocking capacitors.
Connectors Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals, two HF input and two
MF input (for Tri-amp mode operation).
Transducers MF: 10" high efficiency midrange, phase-ring loaded.
HF: 1.5" (38mm) exit, 3" (76mm) titanium diaphragm compression driver.
Mounting Hardware: Attaches to top of the low frequency cabinet using three 5/16”-18 x 3/4” long bolts.
Size 39” high x 30” wide x 20” deep (991 x 762 x 508mm)
Weight 85 lb. (39 kg) net
7
MH-1075 SPL and Impedance vs. Frequency
SPL (dB)
Frequency (Hertz)
Impedance (Ohms)
Impedance
SPL
MH-1063 SPL and Impedance vs. Frequency
SPL
Impedance
SPL (dB)
Frequency (Hertz)
Impedance (Ohms)
Warranty (USA only; other countries, see your dealer or distributor)
Disclaimer
QSC Audio Products, Inc. is not liable for any damage to amplifiers, or any other equipment that is caused by negligence or
improper installation and/or use of this loudspeaker product.
QSC Audio Products 3 Year Limited Warranty
QSC Audio Products, Inc. (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period
of three (3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty
when the defect occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized
service stations via pre-paid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that
the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend
to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been
removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific
legal rights. This limited warranty is freely transferable during the term of the warranty period.
Customer may have additional rights, which vary from state to state.
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this lim-
ited warranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized
dealer, will void this limited warranty. Periodically, this warranty is updated. To obtain the most recent version of QSC’s war-
ranty statement, please visit www.qscaudio.com. Contact us at 800-854-4079 or visit our website at www.qscaudio.com.
Contacting QSC Audio Products
Mailing address:QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
Telephone Numbers:
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
Facsimile Numbers:
Sales & Marketing Fax(714) 754-6174
Customer Service Fax(714) 754-6173
World Wide Web:www.qscaudio.com
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA
©2004 “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.
*TD-000141-00*
Cinema Loudspeaker Systems User Manual
LF-4215 Low Frequency Loudspeaker
Introduction
The LF-4215 dual 15” (381mm) low frequency enclosure is designed specifically for cinema
applications. Meeting cinema requirements for extended low frequency response differenti-
ates the LF-4215 from more conventional “rock-and-roll” woofer systems. The LF-4215 cov-
ers the frequency range from 35 Hertz to 1000 Hertz, depending upon the high frequency
system requirements. Close Coupled Woofers (CCW), with its tight spacing between woof-
ers, improves coupling and keeps coverage angles wide over a greater frequency range than
more widely spaced designs.
The two custom 400 watt, 15” transducers were developed especially for cinema use. They
feature extremely large 4” (100mm) voice coils and a multi-vented pole piece to ensure cool
operation, even at high power levels. Cooler temperatures increase transducer lifespan and
decrease the problem of power compression at high power. An undercut pole piece ensures
the voice coil operates in a Symmetrical Magnetic Gap (SMG), reducing second harmonic
distortion.
The enclosure is constructed of high quality MDF panels and features Single Woofer Cham-
bers (SWC, separate chambers for each transducer). In the rare event of a transducer failure,
this prevents over-excursion of the remaining transducer caused by improper box loading.
Large, Fully Radiused Ports (FRP) ensure smooth air flow through the ports, especially at
higher power. This prevents potentially audible port turbulence noise. Both internal and
external port openings are fully radiused.
With Symmetrical Port Loading (SPL), bass ports are evenly spaced on each side of the trans-
ducers, making internal pressure more uniform across the back surface of the transducer.
This prevents the cone from being displaced to one side or another by unbalanced forces,
reducing the chance of driving the voice coil out of the center of the gap at high power.
Three T-nuts in the top of the enclosure provide easy mounting of QSC’s HF-75 high fre-
quency system, or MH-1075 mid-high system.
Enclosure is not designed to be suspended, flown, or rigged. Do not sus-
pend, fly, or rig this enclosure.
This product is capable of producing sound pressure levels that can perma-
nently damage human hearing. Always keep sound pressure levels in the
listening area below levels that can damage human hearing.
Install in accordance with QSC Audio Product’s instructions and a
licensed, professional engineer. Only use attachments, mounts, accesso-
ries, 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, 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, professional engineer
when any doubt or questions arise regarding a physical equipment installa-
tion.
TD-000141-00 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
Mounting points for high
or mid-high system
Connections
Normal Connection
The LF-4215 has barrier strip screw termi-
nals for connection. The terminals accept
up to #10 AWG stranded loudspeaker wir-
ing. Use the largest wire size and shortest
wire length possible for a given installa-
tion. Observe the polarity markings and
keep polarity consistent throughout the
system for best performance.
Parallel Connection of Second SB-5218
The terminals marker SPK2 may be used to
connect another LF-4215 in parallel. Con-
nect the wires as shown in the illustration,
at right. Note: If the LF-4215’s internal wir-
ing has been modified in any way, this may
not function. If this is the case, remove the
terminal cup and verify the presence of the
factory yellow jumper and blue jumper
wires; remedy as required or have the
loudspeaker serviced.
Individual Transducer Connection
(requires modification)
The transducers are wired in parallel
inside the enclosure. If individual trans-
ducer connection is required, remove the
terminal cup and remove the yellow and
the blue jumper wires that are connected
between the SPK1 and SPK2 terminals.
Replace the terminal cup and mark the
enclosure with a note of the modification.
Normal Connection Example:
Parallel Connection Example:
Individual Transducer
Connection Example:
Amplifier capable of
driving 4 ohm loads
Amplifier capable of
driving 2 ohm loads
CAUTION!
Requires removal
of terminal cup
and cutting of both the
yellow and the blue
jumper wires that con-
nect the SPK1 and SPK2
terminals
Amplifier capable of
driving 2 ohm loads
LF-4215 Specifications (subject to change without notice)
Frequency Range: 38 - 1300 Hertz (±3 dB)
30 - 1400 Hertz useable range (-10 dB)
Nominal Coverage: 100° horizontal X 55° vertical at 600 Hertz
Maximum Output:
134.5 dB SPL calculated peak, 1 meter, half space, at rated rms power with 6 dB crest factor pink noise input, 25 - 250 Hertz.
128.5 dBA SPL calculated maximum continuous, 1 meter. The dBA scale is typically used to identify sound sources
which can cause permanent hearing loss.
Impedance: 4 ohms nominal
3.4 ohms minimum , 150 Hertz
25 ohms maximum, 22 Hertz
Maximum Input Power: 800 watts rms (100 hours of 6 dB crest factor pink noise, 30 - 500 Hertz)
1000 watts rms (2 hours of 6 dB crest factor pink noise, 30 - 500 Hertz, AES method)
recommended amplifier power capability- 1600 watts rms maximum into 4 ohms (per LF-4218)
Sensitivity: 99.5 dB half space, 93.5 dB full space, 35 - 1000 Hertz, 1 watt, 1 meter
Recommended Processing: Subsonic filter below 30 Hertz, >18 dB per octave, maximum recommended crossover frequency is 1000 Hertz. QSC
DSP configurations are available at www.qscaudio.com. Parameters for alternative processing hardware are available
upon request.
Connectors: Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals: (two INPUT and two PARALLEL
OUT). Drivers are internally wired in parallel. For independent transducer connection, remove blue jumper wire and yel-
low jumper wire on internal-side of terminal cup and mark enclosure accordingly.
Transducers: Two 15” (381mm) high efficiency low frequency transducers featuring vented 4” (100mm) copper voice coils on Kap-
ton® formers. High excursion/low distortion design, with extremely high power handling, and low thermal and port
compression.
Enclosure: Quasi B4 alignment, ported enclosure with fully flared ports, low turbulence symmetrical port design, tuned to 36
Hertz, constructed of medium density fibreboard and heavily braced. Features vandal resistant woofer mounting bolts.
Size: 30” wide X 35” high X 20” deep (762 mm X 889 mm X 508 mm)
Weight: 195 lbs. shipping, 172 lbs. net (88/78 kg.)
SPL and Impedance vs. Frequency
Frequency (Hertz)
SPL (dB)
Impedance (ohms)
SPL 2pi
Impedance
SPL 4pi
Warranty (USA only; other countries, see your dealer or distributor)
Disclaimer
QSC Audio Products, Inc. is not liable for any damage to amplifiers, or any other equipment that is caused by negligence or
improper installation and/or use of this loudspeaker product.
QSC Audio Products 3 Year Limited Warranty
QSC Audio Products, Inc. (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period
of three (3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty
when the defect occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized
service stations via pre-paid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that
the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend
to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been
removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific
legal rights. This limited warranty is freely transferable during the term of the warranty period.
Customer may have additional rights, which vary from state to state.
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this lim-
ited warranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized
dealer, will void this limited warranty. Periodically, this warranty is updated. To obtain the most recent version of QSC’s war-
ranty statement, please visit www.qscaudio.com. Contact us at 800-854-4079 or visit our website at www.qscaudio.com.
Contacting QSC Audio Products
Mailing address:QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
Telephone Numbers:
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
Facsimile Numbers:
Sales & Marketing Fax(714) 754-6174
Customer Service Fax(714) 754-6173
World Wide Web:www.qscaudio.com
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA
©2003, 2004, “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.
Kapton® is a registered trademark of E.I. du Pont de Nemours and Company.
Manual del usuario de los sistemas de altavoces para salas de cine
Altavoz de baja frecuencia LF-4215
Introducción
La caja doble de baja frecuencia de 15” (381 mm) del altavoz LF-4215 está diseñada específica-
mente para aplicaciones cinematográficas. El cumplimiento de los requisitos de las aplicaciones
cinematográficas referentes a una respuesta extendida de baja frecuencia, es lo que distingue al
altavoz LF-4215 de otros sistemas woofer tipo “rock-and-roll” más convencionales. El altavoz LF-
4215 cubre un intervalo de frecuencia de 35 Hertzios a 1000 Hertzios, dependiendo de los requisi-
tos del sistema de alta frecuencia. Woofers acoplados cerrados (Close Coupled Woofers, CCW),
con su espacio estrecho entre los woofers, mejora el acoplamiento y mantiene la amplitud de los
ángulos de cobertura sobre un mayor intervalo de frecuencia en comparación con diseños de
espacio más grande.
Los dos transductores adaptados de 400 vatios y 15” se desarrollaron especialmente para su uso
en salas de cine. Tienen bobinas de voz extremadamente grandes, de 4” (100 mm), y un polo mul-
tiventilado que asegura una operación fría, incluso a niveles altos de potencia. Las temperaturas
más frías aumentan la vida útil del transductor y disminuyen el problema de compresión de la
potencia a niveles altos de potencia. Un polo proyectado asegura que la bobina de voz opere en
un campo magnético simétrico (Symmetrical Magnetic Gap, SMG), reduciendo la segunda defor-
mación armónica.
La caja esta construida con paneles MDF (cartón duro de densidad media) de alta calidad y tiene
cámaras de woofer sencillo (Single Woofer Chambers, SWC, cámaras separadas para cada trans-
ductor). En el raro evento de falla del transductor, esto previene la excursión excesiva del trans-
ductor remanente causada por la carga inadecuada de la caja.
Los grandes puertos totalmente redondeados (Fully Radiused Ports, FRP) aseguran un flujo uni-
forme de aire a su través, especialmente a niveles mayores de potencia. Esto evita ruido de tur-
bulencia en el puerto potencialmente audible. Ambas aberturas del puerto, la interna y la
externa, están totalmente redondeadas.
Con la carga simétrica de los puertos (Symmetrical Port Loading, SPL), los puertos de graves
están igualmente separados a cada lado de los transductores, haciendo que la presión interna
sea más uniforme a través de la superficie posterior del transductor. Esto evita que el cono sea
desplazado de un lado a otro por fuerzas no equilibradas, reduciendo la probabilidad de impulsar
la bobina de voz fuera del centro del espacio a altos niveles de potencia.
Tres tuercas en T en la parte superior de la caja permiten el montaje fácil del sistema de alta fre-
cuencia HF-75 o del sistema de frecuencia media alta MH-1075, ambos de QSC.
La caja no esta diseñada para montarse suspendida, en voladizo ni sobre arneses.
No suspenda esta caja, no la monte en voladizo ni sobre arneses.
Este producto es capaz de producir niveles de presión del sonido que pueden
causar daños permanentes al oído humano. Siempre mantenga los niveles de
presión del sonido en un área de audición con un nivel menor que el que provoca
daños al oído humano.
Instale de acuerdo con las instrucciones de QSC Audio Products y de un ingeniero
profesional con la debida licencia. Sólo use piezas, montajes, accesorios o sopo-
rtes especificados por QSC Audio Products, Inc. Refiera todo el servicio a personal
calificado. Cuando el aparato haya sido dañado de alguna manera, es necesario
proporcionarle servicio.
¡ADVERTENCIA! Antes de colocar, instalar, montar o suspender cualquier producto
de altavoz, inspeccione todo el equipo físico, la suspensión, los armarios, los trans-
ductores, los soportes y el equipo asociado para detectar la existencia de daños.
Cualquier componente faltante, corroído, deformado, o sin carga nominal podría
reducir significativamente la resistencia de la instalación, la colocación o la con-
figuración. Cualquier condición de este tipo reduce gravemente la seguridad de la
instalación y debe corregirse de inmediato. Use sólo herraje que esté clasificado
para las condiciones de carga de la instalación y cualquier posible carga excesiva
a corto plazo inesperada. Nunca exceda el valor nominal
del equipo físico ni del
dispositivo. Consulte a un ingeniero profesional con la debida licencia cuando sur-
jan dudas o preguntas referentes a la instalación física del equipo.
TD-000141-00 rev.D
© Derechos de autor 2003, 2004, QSC Audio Products, Inc.
QSC® es una marca comercial registrada de QSC Audio Products, Inc.
“QSC” y el logotipo de QSC están registrados con la Oficina de Patentes y Marcas
Comerciales de los Estados Unidos
1675 MacArthur Blvd., Costa Mesa, CA, 92626 EE.UU.
Número principal +1 (714) 754-6175 Ventas y Comercialización +1 (714) 957-7100
o línea sin costo (sólo para EE.UU.) +1 (800) 854-4079
Servicio al cliente +1 (714) 957-7150 o gratis (sólo EE.UU.) +1 (800) 772-2834
Puntos de montaje para el
sistema de alta frecuencia o el
sistema de frecuencia media alta
Conexiones
Conexión normal
El altavoz LF-4215 tiene terminales de tor-
nillo de barra protectora para su conexión.
Los terminales aceptan cableado trenzado
de hasta #10 AWG para altavoces. Use el
alambre del calibre más grande y de la
longitud más corta posible en cualquier
instalación. Observe las marcas de polar-
idad y mantenga la polaridad uniforme en
todo el sistema para obtener el mejor ren-
dimiento.
Conexión en paralelo de un segundo
SB-5218
Los terminales marcados SPK2 se pueden
usar para conectar en paralelo otro altavoz
LF-4215. Conecte los cables como se
muestra en la ilustración, a la derecha.
Nota: si el cableado interno de LF-4215 se
ha modificado de alguna manera, es
posible que no funcione. En este caso,
quite la cúpula del terminal y verifique la
presencia de alambres amarillos y azules
de puentes instalados en fábrica; corrija el
problema según se requiera, o solicite que
den servicio al altavoz.
Conexión del transductor individual
(requiere modificación)
Los transductores están conectados en
paralelo dentro de la caja. Si se requiere la
conexión del transductor individual, quite
la cúpula del terminal y quite los alambres
amarillo y azul del puente que están
conectados entre los terminales SPK1 y
SPK2. Vuelva a colocar la cúpula del termi-
nal y marque la caja con una nota que
indique la modificación.
Ejemplo de una conexión normal:
Ejemplo de conexión en paralelo:
Ejemplo de la conexión
de un transductor individual:
Amplificador con
capacidad de accio-
namiento de cargas
de 4 ohmios
Amplificador con
capacidad de accio-
namiento de cargas
de 2 ohmios
¡PRECAUCIÓN!
Requiere des-
montar la cúpula
del terminal y cortar los
alambres amarillo y azul
que conectan los termina-
les SPK1 y SPK2
Amplificador con
capacidad de accio-
namiento de cargas
de 2 ohmios
Especificaciones del sistema LF-4215 (sujetas a cambio sin previo aviso)
Intervalo de frecuencias: 38 - 1300 Hertzios (±3 dB)
Intervalo utilizable de 30 - 1400 Hertzios (-10 dB)
Cobertura nominal: 100° horizontal X 55° vertical a 600 Hertzios
Salida máxima:
Pico calculado de SPL: 134.5 dB, 1 metro, medio espacio, a una potencia rms nominal con entrada de ruido rosa con factor de cresta de 6
dB, 25 - 250 Hertzios.
Máximo calculado continuo de SPL: 128.5 dBA, 1 metro. La escala de dBA típicamente se usa para identificar fuentes de
sonido que pueden causar pérdida auditiva permanente.
Impedancia: 4 ohmios, nominal
3.4 ohmios mínimo, 150 Hertzios
25 ohmios máximo, 22 Hertzios
Potencia máxima de entrada: 800 vatios rms (100 horas de ruido rosa con factor de cresta de 6 dB, 30 - 500 Hertzios)
1000 vatios rms (2 horas de ruido rosa con factor de cresta de 6 dB, 30 -500 Hertzios, método AES)
Capacidad recomendada de potencia del amplificador: 1600 vatios rms como máximo en 4 ohmios (por LF-4218)
Sensibilidad: 99.5 dB medio espacio, 93.5 dB espacio completo, 35 - 1000 Hertzios, 1 vatio, 1 metro
Procesamiento recomendado: Filtro subsónico menor de 30 Hertzios, >18 dB por octava, la frecuencia máxima de cruce recomendada es de 1000 Hertzios.
Las configuraciones DSP de QSC están disponibles en www.qscaudio.com. Los parámetros para el herraje de procesamiento
alternativo están disponibles si así se solicitan.
Conectores: Los terminales de tornillo de barra protectora aceptan alambre trenzado de hasta #10 AWG . Cuatro terminales: (dos de
ENTRADA y dos de SALIDA PARALELA). Los excitadores están cableados internamente en paralelo. Para la conexión de un
transductor independiente, quite los alambres azul y amarillo de los puentes que se encuentran en el lado interno de la cúp-
ula del terminal y marque la caja de acuerdo con esto.
Transductores: Dos transductores de baja frecuencia de alta eficiencia, de 15” (381 mm), con bobinas de voz de cobre de 4” (100 mm) venti-
ladas, en soportes de Kapton®. Diseño de alta excursión/baja deformación, con un manejo de potencia extremadamente
alta, y baja compresión térmica y de puerto.
Caja: Alineación Quasi B4, caja con puertos totalmente abocinados, diseño de puerto simétrico de baja turbulencia, afinado a 36
Hertzios, construido de cartón duro de media densidad y fuertemente soportado. Tiene pernos de montaje del woofer resist-
entes al vandalismo.
Tamaño: 30” de ancho X 35” de alto X 20” de profundidad (762 mm X 889 mm X 508 mm)
Peso: 195 libras envío, 172 libras neto (88/78 kg.)
SPL e impedancia en función de la frecuencia
Frecuencia (hertzios)
SPL (dB)
Impedancia (ohmios)
SPL 2pi
Impedancia
SPL 4pi
Garantía (sólo para EE.UU.; para otros países, consulte con su vendedor o distribuidor)
Renuncia de responsabilidad
QSC Audio Products, Inc. no es responsable por ningún daño a los amplificadores, ni a ningún otro equipo que sea causado por
negligencia o instalación y/o uso inadecuado de este altavoz.
Garantía limitada de 3 años de QSC Audio Products
QSC Audio Products, Inc. (“QSC”) garantiza que sus productos estarán libres de materiales y/o mano de obra defectuosos por
un periodo de tres (3) años a partir de la fecha de la venta, y reemplazará las piezas defectuosas y reparará los productos que
funcionen mal bajo esta garantía cuando el defecto ocurra bajo condiciones normales de instalación y uso, siempre y cuando
la unidad se devuelva a nuestra fábrica o a una de nuestras estaciones autorizadas de servicio mediante transportación prep-
agada con una copia del comprobante de compra (por ejemplo, el recibo de la compra). Esta garantía requiere que el examen
del producto devuelto indique, en nuestra opinión, un defecto de fabricación. Esta garantía no se extiende a ningún producto
que hubiera estado sometido a uso indebido, negligencia, accidente, instalación incorrecta, o en el que se hubiera quitado o
modificado el código de la fecha. QSC tampoco será responsable por daños incidentales y/o emergentes. Esta garantía le
otorga derechos legales específicos. Esta garantía limitada es libremente transferible durante el período de la misma.
El cliente podría gozar de derechos adicionales, que podrían variar de un estado a otro.
En caso de que este producto fuera fabricado para exportación y venta fuera de los Estados Unidos o sus territorios, entonces
no será aplicable esta garantía limitada. La eliminación del número de serie en este producto, o la compra de este producto de
un distribuidor no autorizado, anularán esta garantía limitada. Esta garantía se actualiza periódicamente. Para obtener la ver-
sión más reciente de la declaración de la garantía de QSC, por favor visite www.qscaudio.com. Comuníquese con nosotros al
800-854-4079 o visite nuestro sitio en Internet en www.qscaudio.com.
Cómo comunicarse con QSC Audio Products
Dirección postal:QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 EE.UU.
Números de teléfono:
Número principal +1 (714) 754-6175
Ventas y comercialización +1 (714) 957-7100 o gratis (sólo EE.UU.) +1 (800) 854-4079
Servicio al cliente +1 (714) 957-7150 o gratis (sólo EE.UU.) +1 (800) 772-2834
Números de fax:
Fax de ventas y comercialización +1 (714) 754-6174
Fax de servicio al cliente +1 (714) 754-6173
World Wide Web:www.qscaudio.com
Correo electrónico:[email protected]
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 EE.UU.
©2003, 2004, “QSC” y el logo QSC están registrados con la Oficina de Patentes y Marcas Comerciales de EE.UU.
Kapton® es una marca comercial registrada de E.I. du Pont de Nemours and Company.
Manuel d'utilisation de systèmes de haut-parleurs de cinéma
Haut-parleur basse fréquence LF-4215
Introduction
L'enceinte basse fréquence double de 381 mm LF-4215 a été tout spécialement conçue pour les
applications en salle de cinéma. Les exigences des cinémas en matière de réponse longue durée
basse fréquence différencient le LF-4215 des systèmes de haut-parleurs de graves « rock-and-
roll » plus conventionnels. Le LF-4215 couvre la plage de fréquence de 35 à 1 000 Hz, selon les
exigences de haute fréquence du système. Les haut-parleurs de graves attenants (CCW)
améliorent le couplage et permettent des angles de couverture larges sur une plus grande plage
de fréquences que les modèles plus espacés.
Les deux transducteurs personnalisés de 38 cm et 400 W ont été spécialement développés pour
un usage en salles de cinéma. Ils ont des bobines mobiles extrêmement larges (100 mm) et un
pôle à évents multiples, gage d'absence de surchauffe, même à haute puissance. Les
températures inférieures augmentent la durée de vie des transducteurs et diminuent le problème
de compression de puissance à haute puissance. Un pôle évidé garantit le fonctionnement des
bobines mobiles dans un espace magnétique symétrique (SMG), ce qui réduit la distorsion
harmonique secondaire.
L'enceinte est constituée de panneaux en MDF de haute qualité et a des compartiments simples
pour haut-parleurs de graves (SWC, un compartiment par transducteur). Dans l'éventualité rare
d'une panne de transducteur, cette configuration empêche le dépassement de course du
transducteur restant, qui serait causée par le chargement inadapté du boîtier.
Les grands ports entièrement arrondis (FRP) garantissent la circulation d'air uniforme à travers les
ports, surtout à haute puissance. Ceci empêche les interférences sonores. Les ouvertures
internes et externes des ports sont entièrement arrondies.
Grâce au chargement symétrique des ports (SPL), les ports à basses sont équidistants de part et
d'autre des transducteurs, ce qui répartit uniformément la pression interne à travers la surface
arrière du transducteur. Ceci empêche le déplacement du cône d'un côté ou de l'autre par des
forces déséquilibrées, ce qui réduit le risque d'excentrage de la bobine mobile à haute puissance.
Trois écrous en T sur le dessus de l'enceinte facilitent la fixation du système haute fréquence HF-
75 ou du système sonore de hauteur moyenne MH-175 de QSC.
L'enceinte n'a pas été conçue pour être suspendue, balancée ou montée.
La suspension, le balancement ou le montage de l'enceinte sont interdits.
Ce produit est capable de produire des niveaux de pression sonore
susceptibles d'endommager l'ouïe de manière irréversible. Toujours
maintenir les niveaux de pression sonore dans la zone d'écoute en deçà de
niveaux susceptibles de compromettre l'ouïe.
Installer conformément aux instructions de QSC Audio Products et d'un
technicien professionnel diplômé. Utiliser uniquement des fixations,
supports, accessoires ou équerres spécifiés par QSC Audio Products.
Confier toutes les réparations à un personnel qualifié. Une réparation ou
maintenance est requise lorsque l'appareil a été endommagé d'une
manière quelconque.
AVERTISSEMENT ! Avant de placer, installer, monter ou suspendre un haut-
parleur, inspecter l'état de toute la visserie, du matériel de suspension, des
armoires, des transducteurs, des supports et du matériel associé. Tout
composant manquant, corrodé, déformé ou non adapté à la charge risque
de réduire sensiblement la solidité de l'installation, sa mise en place ou sa
portée. Une telle condition réduit sensiblement la sécurité de l'installation
et doit être immédiatement corrigée. Utiliser uniquement du matériel de
montage prévu pour les conditions de charge de l'installation et toute
surcharge éventuelle à court terme imprévue. Ne jamais dépasser les
spécifications nominales du matériel de montage ou de l'équipement.
Consulter un technicien professionnel diplômé en cas de doute ou de
question concernant l'installation physique de l'équipement.
TD-000141-00 rév.D
© Copyright 2003, 2004, QSC Audio Products, Inc.
QSC® est une marque déposée de QSC Audio Products, Inc.
QSC et le logo QSC sont des marques déposées auprès de l'U.S. Patent and
Trademark Office.
1675 MacArthur Blvd., Costa Mesa, CA 92626
Téléphone (standard) +1 (714) 754-6175 Ventes et Marketing +1 (714) 957-7100
ou +1 (800) 854-4079 (numéro vert valable aux États-Unis seulement)
Service clientèle +1 (714) 957-7150 ou numéro vert (États-Unis seulement) +1 (800) 772-2834
Points de fixation d'un
système haute fréquence ou
de hauteur moyenne
Branchements
Branchement normal
Le branchement du LF-4215 se fait à partir de
bornes vissables de bornier à cloisons. Les
bornes acceptent des câbles de haut-
parleurs toronnés pouvant atteindre
#10 AWG. Utiliser le calibre de conducteur
maximal et la longueur de conducteur
minimale, dans la mesure du possible, pour
toute installation. Observer les repères de
polarité et maintenir une polarité constante
à travers le système pour une meilleure
performance.
Branchement en parallèle d'un second
LF-4215
Le marqueur de bornes SPK2 peut servir au
branchement d'un autre LF-4215 en
parallèle. Brancher les conducteurs comme
indiqué sur l'illustration, à droite. Remarque :
Si le câblage interne du LF-4215 a été
modifié d'une manière quelconque, il est
possible que ce branchement ne donne
aucun résultat. Dans ce cas, retirer la cupule
de la borne et vérifier la présence des
connexions temporaires jaune et bleue ;
corriger le problème ou faire réparer le haut-
parleur.
Branchement individuel des
transducteurs (modification obligatoire)
Les transducteurs sont câblés en parallèle à
l'intérieur de l'enceinte. Si un branchement
individuel est requis, retirer la cupule de la
borne et retirer les connexions temporaires
jaune et bleue entre les bornes SPK1 et
SPK2. Remettre la cupule sur la borne et
apposer sur l'enceinte une note indiquant la
modification.
Exemple de branchement
Exemple de branchement en
Transducteur individuel
Exemple de branchement :
Amplificateur capable
de piloter des charges
de 4 ohms
Amplificateur capable
de piloter des charges
de 2 ohms
ATTENTION !
Exige le retrait de
la cupule sur la
borne et la coupe des
connexions temporaires
jaune et bleu entre les
bornes SPK1 et SPK2.
Amplificateur capable
de piloter des charges
de 2 ohms
normal :
parallèle :
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