QSC Audio SC-322X User Manual

Features

• Passive, two-way, screen channel system

• HF-63X2 provides 90° horizontal by +15° to -35° vertical coverage

• LF-3215 is constructed of MDF and features single woofer chambers

• Low-distortion waveguide provides highly articulate dialogue

SC-322X

Cinema Loudspeaker System

• Shallow depth (20

") facilitates installation

Developed specifically for the unique requirements
of professional motion picture playback, the SC-322X
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-322X is a passive, two-way screen channel
loudspeaker system comprised of two main units—the
HF-63X2 high-frequency system and the LF-3215 low­frequency system.

The HF-63X2 high-frequency system features a 2.5"
(63mm) titanium diaphragm compression driver
mounted on a custom designed high-frequency cinema
horn with an adjustable pan and tilt bracket. The HF­63X2 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-3215 dual 15" (381mm) low­frequency enclosure is designed specifically to address
the extended low-frequency response required for
cinema applications.

The LF-3215 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-322X is designed for ease of installation.
The HF-63X2 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the HF-63X2 to the top of the
LF-3215 enclosure.

Specifications SC-322X

Nominal Coverage 90° horizontal x +15 to -35° vertical

Frequency Range 32 Hz - 16 kHz (-6 dB)

Impedance 4Ω

Sensitivity 1 watt /1 meter, 97.5 dB
half space

Maximum Input Power1

2 hours of 6 db crest factor 300 W RMS
pink noise, 50 Hz - 20 kHz,
AES method

Recommended Amplifier Power 600 W RMS maximum

Recommended Processing Subsonic filter below 30 Hz, > 18 dB per octave

LF-3215 HF-63X2

Connectors Barrier strip screw terminals Barrier strip screw terminals

accept up to #10 AWG accept up to #10 AWG
stranded wire stranded wire

Transducers Two 15" (381mm) high efficiency, 1.5" (38mm) exit, 2.5" titanium

extended bass woofer featuring diaphragm compression driver
3" copper voice coils

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" 16" x 30" x 20"
(910 mm x 762 mm x 516 mm) (406 mm x 762 mm x 508 mm)

Weight - Net 172 lbs (78 kg) 40 lbs (18.4 kg)

System Weight 212 lbs (96.4 kg)

Baffle Cut-Out 53" 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.

SC-322X

Dimensions

Top

21.53"

546.9 mm

20.25"

514.4 mm

30"

762 mm

Side

101.6 mm

18.18"

461.8 mm

4"

15.46"

392.6 mm

50.96"

1294.4 mm

35.5"

901.7 mm

Front

Specifications subject to change without notice.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: [phone]

SC-322X Spec Sheet - 03/10/06

20.25"

514.4 mm

qscaudio.com

Features

• Passive, two-way, screen channel system

• HF-63X2 provides 90° horizontal by +20° to -30° vertical coverage

• LF-3215 is constructed of MDF and features single woofer chambers

• Low-distortion waveguide provides highly articulate dialogue

SC-322X

Cinema Loudspeaker System

• Shallow depth (20

") facilitates installation

Developed specifically for the unique requirements
of professional motion picture playback, the SC-322X
extends QSC’s commitment to the cinema market. As
a member of the DCS Digital Cinema Speaker Series,
the SC-322X is a passive, two-way screen channel
loudspeaker system comprised of two main units—the
HF-63X2 high-frequency system and the LF-3215 low­frequency system.

The HF-63X2 high-frequency system features a 2.5"
(63mm) titanium diaphragm compression driver
mounted on a custom designed high-frequency cinema
horn with an adjustable pan and tilt bracket. The HF­63X2 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-3215 dual 15" (381mm) low­frequency enclosure is designed specifically to address
the extended low-frequency response required for
cinema applications.

The LF-3215 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-322X is designed for ease of installation.
The HF-63X2 components come pre-assembled to
reduce field assembly time. Three bolts are all that
are required to secure the HF-63X2 to the top of the
LF-3215 enclosure.

Specifications SC-322X

Nominal Coverage 90° horizontal x +20 to -30° vertical

Frequency Range 32 Hz - 16 kHz (-6 dB)

Impedance 4Ω

Sensitivity 1 watt /1 meter, 97.5 dB
half space

Maximum Input Power1

2 hours of 6 db crest factor 300 W RMS
pink noise, 50 Hz - 20 kHz,
AES method

Recommended Amplifier Power 600 W RMS maximum

Recommended Processing Subsonic filter below 30 Hz, > 18 dB per octave

LF-3215 HF-63X2

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 LF-outputs

Transducers Two 15" (381mm) high efficiency, 1.5" (38mm) exit, 2.5" titanium

extended bass woofer featuring diaphragm compression driver
3" copper voice coils

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" 16" x 30" x 20"
(910 mm x 762 mm x 516 mm) (406 mm x 762 mm x 508 mm)

Weight - Net 172 lbs (78 kg) 40 lbs (18.4 kg)

System Weight 212 lbs (96.4 kg)

Baffle Cut-Out 53" 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.

1675 MacArthur Blvd., Costa Mesa, CA, 92626 USA
Main Number [phone] Sales & Marketing [phone] or toll free (USA only) [phone]
Customer Service(714) 957-7150 or toll free (USA only) [phone]

Cinema Loudspeaker Systems User Manual

HF-63X1 and HF-63X2

High Frequency Component

Introduction

The HF-63X1 and HF-63X2 are the high frequency components of full-range,
two-way screen channel loudspeaker systems for high performance cinema
applications. The HF-63X1 is designed specifically for use with QSC’s LF­3115 low frequency loudspeaker and the HF-63X2 for the LF-3215 loud­speaker.

The HF-63X1/X2 high-frequency system features a large format, 2.5”
(63.5mm) titanium diaphragm compression driver mounted on a custom
designed high-frequency cinema horn with an adjustable pan and tilt
bracket. The horn features broad horizontal and vertical coverage angles to
ensure coverage of every seat in the auditorium. The horn is a low-distortion
waveguide providing highly articulate dialogue without coloration associ­ated with conventional horn loudspeakers. Equipped with a passive cross­over providing tailored output for the LF-3115 or LF-3215, no additional
signal processing is required.

The HF-63X1/X2 components come pre-assembled to reduce field assembly
time. Three bolts are all that are required to secure the HF-63X1/X2 to the
top of a QSC low frequency loudspeaker. Threaded inserts in the LF enclo­sures and matching punched hole pattern in the HF-63X1/X2 make mounting
to the low frequency enclosure simple.

Mounting

Refer to the illustration for mounting information. The HF-63X1/X2 attaches
to the top of the LF-3115 or LF-3215 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 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. 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 installation.

*TD-000219-00*

“QSC” and the QSC logo are registered with the U.S. Pa tent and Trademark Office

QSC® is a registered trademark of QSC Audio Products, Inc.

© Copyright 2006, QSC Audio Products, Inc.

TD-000219-00 rev.A

1

Connections

The HF-63X1/X2 has barrier strip screw terminals that accept up to #10 AWG (5.3mm2) stranded loudspeaker wire.

INPUT Terminals

Connect the amplifier’s full range output signal to the HF-63X1 or HF-63X2 INPUT terminals. Observe proper polarity; the amplifier’s + signal to
the HF-63X1 or HF-63X2 + INPUT, the amplifier’s
length for the application.

HF OUT Terminals

The HF OUT terminals are factory-connected to the compression driver. These terminals should ONLY be connected to the HF-63X1 or HF-63X2
compression driver. Observe proper polarity; the + HF OUT signal to the compression driver’s + input, the
driver’s

- input.

LF OUT Terminals

The HF-63X1 is designed specifically for use with QSC’s LF-3115 low frequency loudspeaker and the HF-63X2 for the LF-3215 loudspeaker. The
LF OUT terminals are factory-terminated to lead wires with spade-lugs. These should ONLY be connected to QSC’s model LF-3115 or model LF-
3215 low frequency loudspeaker. Observe proper polarity; connect the + LF OUT signal to the low frequency loudspeaker’s + input, the

OUT signal to the low frequency loudspeaker’s

- signal to the HF-63X1 or HF-63X2 - INPUT. Use the largest wire size and shortest wire

- HF OUT signal to the compression

- input.

HF-63X1 or HF63X2
Compression
Driver

To LF-3115 or LF-3215

The HF-63X1 is designed
specifically for use with
QSC’s LF-3115 low fre­quency loudspeaker and
the HF-63X2 for the LF-3215
loudspeaker.

- LF

HF OUT connection ter­minals. Connect to HF­63X1 or HF-63X2 com­pression driver.

HF-63X1 or HF-63X2
INPUT connection
terminals

2

LF OUT connection
terminals. Connect to
LF-3115 or LF 3215
loudspeaker INPUT
terminals.

Amplifier

HF-63X1 and HF-63X2 Specifications (subject to change without notice)

Frequency Range: 1,300 - 16,000 Hz (-6 dB)

Nominal Coverage: 90° horizontal X +15 to -35° vertical (50° total, adjustable mount provides for vertical plane adjustments. The hori-

zontal plane can be adjusted by altering mounting position on the low frequency enclosure before tightening bolts.

DI: 9.0 dB (600 to 16,000 Hertz average)

Q: 8.0 (600 to 16,000 Hertz average)

SPL (peak): HF-63X1 with LF-3115: 123 dB

HF-63X2 with LF-3215: 126 dB

Impedance: HF-63X1 with LF-3115: 8 Ohms nominal

HF-63X2 with LF-3215: 4 Ohms nominal

Maximum Input Power: HF-63X1 with LF-3115: 150 W
(2 hours EIA 426B) HF-63X2 with LF-3215: 300 W

Sensitivity: HF-63X1 with LF-3115: 95.0 dB

HF-63X2 with LF-3215: 97.5 dB

Crossover Frequency: 1,300 Hz

Connectors: Barrier strip screw terminals accept up to #10 AWG stranded wire. Six terminals: Two full-range input terminals,

two HF OUT terminals (factory wired to compression driver), and two LF OUT terminals with factory supplied wiring
for connection to QSC LF-3115 or LF-3215 low frequency loudspeaker.

Transducers: 1.5” (38mm) exit, 2.5” (63.5mm) titanium diaphragm compression driver.

Mounting Hardware: Attaches to top of the LF-3115 or LF-3215 low frequency cabinet using three 5/16”-18 x 3/4” long bolts.

Size: 30” wide X 16” high X 20” deep (762mm X 406mm X 508mm)

Weight: 50 lbs. (shipping), 40 lbs. (net), 22.7/18.4 kilograms

3

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 lim­ited 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 war­ranty 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 [phone]
Sales & Marketing [phone] or toll free (USA only) [phone]
Customer Service(714) 957-7150 or toll free (USA only) [phone]

Facsimile Numbers:
Sales & Marketing Fax[phone]
Customer Service Fax[phone]

World Wide Web:www.qscaudio.com
E-mail:[e-mail]
[e-mail]

QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA

©2006 “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.

4

1675 MacArthur Blvd., Costa Mesa, CA, 92626 USA
Main Number [phone] Sales & Marketing [phone] or toll free (USA only) [phone]
Customer Service [phone] or toll free (USA only) [phone]

Cinema Loudspeaker Systems User Manual

LF-3215 Low Frequency Loudspeaker

Introduction

The LF-3215 dual 15” (381mm) low frequency enclosure is designed specifically for cinema
applications. Meeting cinema requirements for extended low frequency response differenti­ates the LF-3215 from more conventional “rock-and-roll” woofer systems. The LF-3215 cov­ers the frequency range from 32 Hertz to 1500 Hertz, depending upon the high frequency
system requirements. With its tight spacing between woofers, the LF-3215 offers improved
coupling and keeps coverage angles wide over a greater frequency range than more widely
spaced designs.

The 300 watt, 15” transducers are well suited for cinema use. They feature 3” (76mm) voice
coils, 120 oz.(3.4kg) ceramic magnets, and vented pole pieces to ensure cool operation.
Cooler temperatures increase transducer lifespan and decrease the problem of power com­pression at high power levels. The suspension and voice coil of each transducer have been
designed to provide low distortion and high impact bass at high power levels.

The enclosure is constructed of high quality medium density fiberboard panels with stiffen­ing braces on all panels and features separate woofer chambers. This prevents over-excur­sion of a transducer caused by improper box loading in the rare event of a transducer failure.
The eight stiffening braces reduce panel resonance.

Mounting points for mid-

high or high frequency

system

Both internal and external port openings are fully radiused ensuring smooth air flow at high
power. This prevents audible port turbulence noise.

With symmetrical port loading, bass ports are evenly spaced on each side of the transduc­ers, 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 levels.

Three T-nuts in the top of the enclosure provide easy mounting of QSC’s HF-63 high fre­quency system, or MH-1063 mid-high frequency system.

Enclosure is not designed to be suspended, flown, or rigged. Do not sus­pend, fly, or rig this enclosure.

This product is capable of producing sound pressure levels that can perma­nently 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, 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, 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 installa­tion.

*TD-000173-00*

“QSC” and the QSC logo are registered with the U.S. Pa tent and Trademark Office

QSC® is a registered trademark of QSC Audio Products, Inc.

© Copyright 2004, QSC Audio Products, Inc.

TD-000173-00 rev.C

Connections

Normal Connection

The LF-3215 has barrier strip screw termi­nals for connection. The terminals accept
up to #10 AWG (5.3mm
speaker wiring. Use the largest wire size
and shortest wire length possible for the
application. Observe the polarity markings
and keep polarity consistent throughout
the system for best performance.

Parallel Connection of Second LF-3215

The terminals marker SPK2 may be used to
connect another LF-3215 in parallel. Con­nect the wires as shown in the illustration,
at right. Note: If the LF-3215’s internal wir­ing 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.

2

) stranded loud-

Normal Connection Example:

Amplifier capable of
driving 4 ohm loads

Parallel Connection Example:

Amplifier capable of
driving 2 ohm loads

Individual Transducer Connection
(requires modification)

The transducers are wired in parallel
inside the enclosure. If individual trans­ducer 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.

Individual Transducer
Connection Example:

CAUTION! Requires
removal of terminal
cup and removing
both the yellow and
the blue jumper
wires that connect
the SPK1 and SPK2
terminals.