*TD-000246-00*
Cinema Mid-High-Very High Loudspeaker System User Manual
MHV-1090
10” (254mm) mid, coax high- very high compression driver
Introduction
The MHV-1090 system provides the mid, high, and very high-frequency components
of four-way screen channel loudspeaker system for high performance cinema applica-
tions. It was designed to operate with and be directly mounted on QSC’s cinema low-
frequency enclosures.
The high-frequency horn is a low-distortion waveguide providing highly articulate dia-
logue without the coloration associated with conventional horn loudspeakers. Both
horns feature broad horizontal and vertical coverage to ensure audio integrity is deliv-
ered to every seat in the auditorium. The driver assemblies are mounted on an adjust-
able pan and tilt bracket that has an integral aiming sight, simplifying installation.
The MHV-1090 includes a driver protection and high-very high-frequency crossover
network to assure reliable operation. DC blocking capacitors protect against DC or
low-frequency signals that could damage an unprotected driver. A 12 dB per octave
crossover seamlessly blends the high and very high-frequency elements when oper-
ated in tri-amp mode. Outboard processing is required to form the crossover between
the low, mid, and high-very high-frequency drivers.
Tri-amp or quad-amp operation is possible using a selector switch mounted on the
INPUTS connection panel. The tri-amp setting provides a built-in passive crossover
network between high and very high-frequency drivers. Separate amplifiers and
active crossovers are required for the low, mid, high-very high-frequency channels.
Quad-amp setting disables the internal high-very high-frequency crossover and each
driver is driven independently by its own amplifier and active crossover; one each
required for the low, mid, high, and very high-frequency drivers.
The MHV-1090 components come pre-assembled to reduce field assembly time.
Three bolts are all that are required to secure the 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, acces-
sories, or brackets specified by QSC Audio Products, LLC Refer all ser-
vicing 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, enclosures, 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-000246-00-B
© Copyright 2007, 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
30”
(762mm)
39”
(991mm)
20”
(508mm)
