QSC HF-63 User Manual

Cinema Loudspeaker Systems User Manual
HF-63
High Frequency Component
Introduction
The HF-63 is the high frequency component of two-way, biamplified screen
channel loudspeaker systems for high performance cinema applications. It
was designed to operate with and be directly mounted on QSC cinema
woofers such as the LF-4215, LF-3215, LF-4115, and LF-3115.
The HF-63 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 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 coloration associated with conven-
tional horn loudspeakers.
The HF-63 includes a driver protection and equalization network to assure
reliable operation. DC blocking capacitors protect against DC or low-fre-
quency signals that could damage an unprotected driver. Power limiter cir-
cuitry protects the driver from over-powering and a response correction filter
smoothes the frequency response of the horn/driver combination. Outboard
processing is required, however, as the response correction filter is not a
crossover.
The HF-63 components come pre-assembled to reduce field assembly time.
Three bolts are all that are required to secure the HF-63 to the top of a QSC
low frequency enclosure.
Mounting
Refer to the illustration for mounting information. The HF-63 attaches to the
top of the LF-4215, LF-3215, LF-4115, or LF-3115 with three 5/16-18 bolts,
0.75" long, with lock washers. This hardware ships installed on the low fre-
quency cabinet. We recommend the use of serviceable thread locking com-
pound 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.
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