QSC SC-413C Manual

QSC Højttaler SC-413C

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Side 1/30

20” (508 mm)

39”

(991 mm)

30” (762 mm)

Cinema Mid-High Loudspeaker System User Manual

MH-1075C 10” (254mm) mid, 3.0” (75mm) compression driver

Introduction

The MH-1075C “mid-high pack” provides the mid and high frequency components of

three-way screen channel loudspeaker systems for high performance cinema applica-

tions. 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, 3.0” (75mm) titanium diaphragm 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 con-

ventional horn loudspeakers. Both horns feature broad horizontal and vertical cover-

age 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-1075C loudspeaker includes 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-1075C components come pre-assembled to reduce field assembly 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, LLC Refer all servicing to quali-

fied 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.

000352

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

*TD 00*-000352-

Settings

BI-AMP / TRI-AMP Operating Mode Selection

Set the operating mode selector switch to BI-AMP or TRI-AMP, depending on your application setup.

Mounting

Attaching to Low Frequency Enclosure

The mid-high loudspeaker assembly attaches to the top of the QSC low frequency cabinet with three M8 bolts, 20mm long, with lock

washers. This hardware ships installed on the low frequency cabinet. We recommend the use of serviceable thread locking compound

when installing the bolts to prevent loosening due to vibration. Do not fully tighten the mounting hardware before aiming (see below).

Aiming

Aim the horn in the horizontal plane (pan) before tightening the attachment hardware. Adjust the vertical tilt with the mid-high vertical

adjustment bracket. The mid-high assembly is equipped with an aiming sight to assist in achieving desired coverage quickly and easily.

For typical applications, the aim point should be the center seat in the back row of the auditorium. If the cinema screen has already

been installed, a flashlight placed at the desired aiming point een perforations in a darkened audi can be seen through the scr torium.

Where the sight holes are located: How to use the sights:

Aim point:

BI BI-AMP-When set to -AMP, the MH-1075C accepts mid-high frequency

signals on one set of inputs and uses an internal crossover network

between the mid- and high-frequency drivers. The signal applied to the

mid-high loudspeaker assembly must not contain low-frequency content

(below 200 Hz).

TRI TRI-AMP- When set to -AMP, the MH-1075C accepts separate mid-

and high-frequency signals on two sets of inputs. The internal crossover

network is bypassed and only the protective circuitry for the H.F. driver

remains. Each of the driver’s signals must have the appropriate signal pro-

cessing before operating.

Do not connect amplifiers directly to the driver inputs! Always

use the input terminal strip.

Produkt Specifikationer

Mærke:	QSC
Kategori:	Højttaler
Model:	SC-413C

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