QSC HF-75B Handleiding

QSC Speaker HF-75B

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EN
ES
FR
DE
CH
30” (762 mm)
20” (508 mm)
16”
(406 mm)
*TD-000326-00*
Cinema Loudspeaker Systems User Manual
HF-75B High Frequency Component
Introduction
The HF-75B is the high frequency component of the SC-312B, SC-412B,
SC-322B, and SC-422B two-way, biamplified screen channel loudspeakers for
high performance cinema applications. The system is shipped as two separate
components: the HF-75B high frequency system and one of the woofer systems
(LF-3115, LF-3215, LF-4115 and LF-4215).
The HF-75B 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 hori-
zontal and vertical coverage angles to ensure coverage of every seat in the audi-
torium. The horn is a low-distortion waveguide providing highly articulate dialogue
without the “honky” coloration associated with conventional horn loudspeakers.
The HF-75B 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-power-
ing 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-75B components come pre-assembled to reduce field assembly time.
Three bolts are all that are required to secure the HF-75B to the top of the low fre-
quency enclosure.
Mounting
Refer to the illustration for mounting information. The HF-75B attaches to the top
of a woofer system with three M8 bolts, 20mm long, with lock washers. We recom-
mend 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, LLC
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 instal-
lation 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 rat-
ing of the hardware or equipment. Consult a licensed, professional
engineer when any doubt or questions arise regarding a physical
equipment installation.
TD-000326-00-B
© Copyright 2010 QSC Audio Products, LLC
QSC® is a registered trademark of QSC Audio Products, LLC
“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
EN
2
Connections
The HF-75B has barrier strip screw terminals that accept up to #10 AWG (6mm
2
) 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-75B! There is no crossover in the HF-75B, only a compensation/delay net-
work. All required signal processing must be done upstream of the HF-75B. Maintain proper loudspeaker 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-75B’s
compression driver.
QSC DCM or other active crossover
HF-75B compression driver
Amplifier
Processed high frequency
program signal
HF-75B
connection
terminals
Note: The HF-75B 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.
EN
3
HF-75B Specifications (subject to change without notice)
Frequency Range: 600 – 16k Hz (-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
Maximum Input Power: 60 watts rms (100 hours, band limited AES, 500 – 20,000 Hz)
80 watts rms (2 hours, band limited AES, 500 – 20,000 Hz)
Sensitivity: 108 dB half space, 1 watt, 1 meter
Crossover Frequency: 1000 Hz or higher, 24 dB per octave
Connectors: Barrier strip screw terminals accept up to #10 AWG (6mm2) stranded wire. Four terminals: (two HF INPUT and
two post compensation HF OUTPUT). HF OUTPUT factory wired to compression driver.
Transducers: 1.4” (35.6mm) exit, 3.0” (76mm) voice coil, titanium diaphragm compression driver
Mounting Hardware: Attaches to top of low frequency cabinet using three M8 bolts, 20mm long.
Size: 30” wide X 16” high X 20” deep (762mm X 406mm X 508mm)
Weight: 36 lbs. (shipping), 26 lbs. (net), 16.3/11.8 kilograms
HF-75B without Signal Processing
SPL (dB)
Frequency (Hertz)
Impedance (Ohms)
Impedance
SPL

Product specificaties

Merk: QSC
Categorie: Speaker
Model: HF-75B

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