HF-75 - Speaker QSC - Free user manual and instructions

USER MANUAL HF-75 QSC

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) 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 the "honky" coloration associated with conventional horn loudspeakers.

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 over-powering 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 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. 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.

Technical line drawing of a mechanical assembly with no visible text or symbols

21" (533mm) 30" (762mm)

16" (406mm)

20" (508mm)

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

Connections

The HF-75 has barrier strip screw terminals that accept up to #10 AWG stranded loudspeaker wire.

HF INPUT Terminals

Connect the amplifier's output signal to the loudspeaker's HF INPUT terminals. Observe proper polarity; amplifier + signal to loudspeaker + HF INPUT, amplifier - signal to loudspeaker - HF INPUT. Use the largest wire size and shortest length for the application.

NOTE! Do not apply full range signal to the HF-75! There is no crossover in the HF-75, only a compensation/delay network. All required signal processing must be done upstream of the HF-75. Maintain proper loud-speaker connection polarity throughout the entire system for maximum performance.

HF OUTPUT Terminals

The HF OUTPUT terminals are factory-connected to the compression driver. These terminals should ONLY be connected to the HF-75's compression driver.

QSC DCM or other active crossover Amplifier Processed high frequency program signal HF-75 connection terminals HF-75 connection driver Note: The HF-75 connection enclosure does not contain a crossover network! Ensure only high frequency signal is applied to HF INPUT terminals or compression driver damage will occur.

Note: The HF-75 connection enclosure does not contain a crossover network! Ensure only high frequency signal is applied to HF INPUT terminals or compression driver damage will occur.

HF-75 Specifications (subject to change without notice)

Frequency Range: 600 - 16kHz (-6 dB, full space)

Nominal Coverage:

90° horizontal X +15° to -35° vertical (50° total, adjustable mount provides for vertical plane adjustments. The horizontal plane can be adjusted by altering mounting position on the LF-4215 enclosure before tightening bolts.

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

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

Maximum Output: 133 dB SPL calculated peak, 1 meter, half space.

Impedance: 8 ohms nominal

8.0 ohms minimum at 3,000 Hertz

104 ohms maximum at 475 Hertz

Maximum Input Power:

60 watts rms (100 hours of 6 dB crest factor pink noise, 500 to 20,000 Hertz, IEC method)

80 watts rms (2 hours of 6 dB crest factor pink noise, 60 - 6,000 Hertz, AES method)

Sensitivity: 108 dB half space, 1 watt, 1 meter

Crossover Frequency: 700 Hertz or higher, 24 dB per octave

Connectors:

Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals: (two HF INPUT and two post compensation HF OUTPUT). HF OUTPUT factory wired to compression driver.

Transducers: 1.5" (38mm) exit, 3.0" (76mm) titanium diaphragm compression driver.

Mounting Hardware:

Attaches to top of 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

SPL and Impedance vs. Frequency

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]

Technical line drawing of a mechanical assembly with a pulley and housing (no text or symbols)

21" (533mm) 30" (762mm)

16" (406mm)

20" (508mm)

Conexiones

[e-mail]

Technical line drawing of a mechanical assembly with a pulley and housing (no text or symbols)

21" (533mm) 30" (762mm)

16" (406mm)

20" (508mm)

Branchements

Adresse postale : QSC Audio Products, Inc.

1675 MacArthur Boulevard

[e-mail]

Technical line drawing of a mechanical assembly with a pulley and housing (no text or symbols)

21" (533mm) 30" (762mm)

16" (406mm)

20" (508mm)

Verbindungen

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影院扬声器系统用户手册

HF-75 高频组件

简介

Technical line drawing of a mechanical assembly with no visible text or symbols

21" (533mm) 30" (762mm)

16" (406mm)

20" (508mm)

连接

[e-mail]