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 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, 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*
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
