QSC Audio MH 1075 User Manual

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  
Cinema Mid-High Loudspeaker System User Manual  
MH-1063  
MH-1075  
Introduction  
10” (254mm) mid, 2.5” (63mm) compression driver  
10” (254mm) mid, 3.0” (75mm) compression driver  
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  
QSCs 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  
Connections  
INPUT Terminals  
2
The MH-1063 and MH-1075 have barrier strip screw terminals that accept up to #10 AWG (5.3mm ) stranded loudspeaker wire.  
Observe proper polarity. Use the largest wire size and shortest wire length for the application.  
OUTPUT Terminals  
The OUTPUT terminals are factory-connected to the drivers. These terminals should ONLY be connected to their respective driver. Do  
not connect signals to these terminals as all protection and equalization circuitry will be bypassed.  
NOTE! Maintain proper loudspeaker connection polarity throughout the entire system for maximum performance.  
Do not apply full range signal to the MH-1063 / MH-1075! There is a mid-high passive crossover for bi-amp mode  
only. There is no crossover connected when operating in tri-amp mode. A protection network is always active. All  
required signal processing must be done before the signal is applied to the loudspeaker. Do not connect any sig-  
nal to the upper sets of OUTPUT terminals.  
BI-AMP mode connections- Ensure the mode switch is set to BI-AMP, connect the input to the MH-1063 / MH-1075 to the lower  
set of input terminals marked “BI-AMP + -”.  
BI-AMP Mode- one  
amplifier channel is used  
for the low frequency  
cabinet and one amplifier  
channel for the mid-high  
assembly. The MH-1063 /  
MH-1075 mode switch is  
set to BI-AMP. Active  
crossovers are used  
before amplification. The  
mid-high assembly pro-  
vides a passive crossover  
between the mid and  
high frequency drivers.  
3
Connections (continued)  
TRI-AMP mode connections- When the mode switch is set to TRI-AMP, connect the high frequency signal to the terminals marked  
INPUT HI + -” and the mid frequency signal to the terminals marked “INPUT MID + -”.  
TRI-AMP Mode- one  
amplifier channel is  
used for the low fre-  
quency cabinet, one  
amplifier channel for  
the mids, and one  
amplifier channel for  
the high frequencies.  
The MH-1063 / MH-  
1075 mode switch is  
set to TRI-AMP,  
bypassing the internal  
mid-high passive cross-  
over. Active or passive  
crossovers are used  
before amplification.  
Power limiter and DC  
blocking remain active.  
4
MH-1063 Specifications (subject to change without notice)  
Freq. Range  
180 - 15k (-6dB, full space)  
Nominal Coverage  
90° horizontal X +20 to -30° vertical (50° total, adjustable mount provides for vertical plane adjustments.  
The horizontal plane can be adjusted by altering mounting position on the low frequency enclosure before  
tightening bolts.  
DI:  
9 dB (400 to 16k Hertz average)  
8 (400 to 16k Hertz average)  
Q:  
Max. Output:  
[Tri-amp mode] Mid Freq. 135.5 dB SPL calculated peak, 1m, full space  
[Tri-amp mode] High Freq. 131.5 dB SPL calculated peak, 1m, full space  
[Bi-amp mode] 135 dB SPL calculated peak, 1m ,full space  
Impedance:  
[Bi-amp mode] 8 ohms nominal  
7.9 ohms minimum at 1500 Hertz  
91 ohms maximum at 150 Hertz  
Maximum Input Power  
Sensitivity  
[Tri-amp mode] Mid Freq. 275 W (AES method, 2 hrs.)  
[Tri-amp mode] High Freq. 60 W (AES method, 2 hrs.)  
[Bi-amp mode] 250 W (IEC method, 8 hrs.)  
[Tri-amp mode] Mid Freq. 105 dB SPL, 1 watt, 1 meter  
[Tri-amp mode] High Freq. 107.5 dB SPL, 1 watt, 1 meter  
[Bi-amp mode] 135 dB SPL, 1 watt, 1 meter  
Crossover Frequency  
Crossover Network  
[Tri-amp mode] 250 Hertz or higher, 24dB/octave and 1.7k Hertz, 24dB/octave  
[Bi-amp mode] 250 Hertz or higher, 24dB/octave  
1.7k Hertz, 18 dB/octave electrical slope, HF driver power limiting circuit (never disrupts continuity). Swit-  
chable operation between Bi-Amp and Tri-amp operation. Tri-amp setting removes crossover circuit from  
signal, leaving power limiter and DC blocking capacitors.  
Connectors  
Transducers  
Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals, two HF input and two  
MF input (for Tri-amp mode operation).  
MF: 10" high efficiency midrange, phase-ring loaded.  
HF: 1.5" (38mm) exit, 2.5" (63.5mm) titanium diaphragm compression driver.  
Mounting Hardware:  
Attaches to top of the low frequency cabinet using three 5/16”-18 x 3/4” long bolts.  
39” high x 30” wide x 20” deep (991 x 762 x 508mm)  
85 lb. (39 kg) net  
Size  
Weight  
5
MH-1075 Specifications (subject to change without notice  
Freq. Range  
180 - 15k (-6dB, full space)  
Nominal Coverage  
90° horizontal X +20 to -30° vertical (50° total, adjustable mount provides for vertical plane adjustments.  
The horizontal plane can be adjusted by altering mounting position on the low frequency enclosure before  
tightening bolts.  
DI:  
9 dB (400 to 16k Hertz average)  
8 (400 to 16k Hertz average)  
Q:  
Max. Output:  
[Tri-amp mode] Mid Freq. 135.5 dB SPL calculated peak, 1m, full space  
[Tri-amp mode] High Freq. 133 dB SPL calculated peak, 1m, full space  
[Bi-amp mode] 135.5 dB SPL calculated peak, 1m ,full space  
Impedance:  
[Bi-amp mode] 8 ohms nominal  
6.4 ohms minimum at 1500 Hertz  
91 ohms maximum at 150 Hertz  
Maximum Input Power  
Sensitivity  
[Tri-amp mode] Mid Freq. 275 W (AES method, 2 hrs.)  
[Tri-amp ode] High Freq. 80 W (AES method, 2 hrs.)  
[Bi-amp mode] 250 W (IEC method, 8 hrs.)  
[Tri-amp mode] Mid Freq. 105 dB SPL, 1 watt, 1 meter  
[Tri-amp mode] High Freq. 108 dB SPL, 1 watt, 1 meter  
[Bi-amp mode] 135.5 dB SPL, 1 watt, 1 meter  
Crossover Frequencies  
Crossover Network  
[Tri-amp mode] 250 Hertz or higher, 24dB/octave and 1.7k Hertz, 24dB/octave  
[Bi-amp mode] 250 Hertz or higher, 24dB/octave  
1.7k Hertz, 18 dB/octave electrical slope, HF driver power limiting circuit (never disrupts continuity). Swit-  
chable operation between Bi-Amp and Tri-amp operation. Tri-amp setting removes crossover circuit from  
signal, leaving power limiter and DC blocking capacitors.  
Connectors  
Transducers  
Barrier strip screw terminals accept up to #10 AWG stranded wire. Four terminals, two HF input and two  
MF input (for Tri-amp mode operation).  
MF: 10" high efficiency midrange, phase-ring loaded.  
HF: 1.5" (38mm) exit, 3" (76mm) titanium diaphragm compression driver.  
Mounting Hardware:  
Attaches to top of the low frequency cabinet using three 5/16”-18 x 3/4” long bolts.  
39” high x 30” wide x 20” deep (991 x 762 x 508mm)  
85 lb. (39 kg) net  
Size  
Weight  
6
MH-1063 SPL and Impedance vs. Frequency  
SPL  
Impedance  
Frequency (Hertz)  
MH-1075 SPL and Impedance vs. Frequency  
SPL  
Impedance  
Frequency (Hertz)  
7
Warranty (USA only; other countries, see your dealer or distributor)  
Disclaimer  
QSC Audio Products, Inc. is not liable for any damage to amplifiers, or any other equipment that is caused by negligence or  
improper installation and/or use of this loudspeaker product.  
QSC Audio Products 3 Year Limited Warranty  
QSC Audio Products, Inc. (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period  
of three (3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty  
when the defect occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized  
service stations via pre-paid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that  
the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend  
to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been  
removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific  
legal rights. This limited warranty is freely transferable during the term of the warranty period.  
Customer may have additional rights, which vary from state to state.  
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this lim-  
ited warranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized  
dealer, will void this limited warranty. Periodically, this warranty is updated. To obtain the most recent version of QSC’s war-  
Contacting QSC Audio Products  
Mailing address:QSC Audio Products, Inc.  
1675 MacArthur Boulevard  
Costa Mesa, CA 92626-1468 USA  
Telephone Numbers:  
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  
Facsimile Numbers:  
Sales & Marketing Fax(714) 754-6174  
Customer Service Fax(714) 754-6173  
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA  
©2004 “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.  

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