MQ-109-B
Enviromental Equalizer
OWNERS
MANUAL
MQ109B
McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549
Thank You, Please Take A Moment,
Customer Service and Table of Contents
Thank You
For your decision to own this McIntosh MQ109B
Enviromental Equalizer ranks you at the very top among
discriminating music listeners. You now have The Best.
The McIntosh dedication to Quality, is assurance that you
will receive many years of musical enjoyment from this
unit.
Please take a short time to read the information in this
manual. We want you to be as familiar as possible with all
the features and functions of your new McIntosh MQ109B.
This will ensure that you receive all the performance benefits this equipment can offer you, and that it will become a
highly valued part of your home entertainment system.
Please Take A Moment
The serial number, purchase date and McIntosh dealer name
are important to you for possible insurance claim or future
service. The serial number is located on the rear panel of the
equipment. The spaces below have been provided for you to
record that information:
Serial Number:
Table of Contents
Thank You.......................................................................... 2
Please Take a Moment ....................................................... 2
Customer Service ............................................................... 2
Table of Contents ............................................................... 2
Safety Instructions ............................................................. 3
Introduction ........................................................................ 4
Performance Features ........................................................ 4
Installation ......................................................................... 4
Side and Rear Panel Connections ...................................... 5
How to Connect ................................................................. 6
Front and Panel Controls and Switches ............................. 7
How to Operate .................................................................. 8
Specifications ................................................................... 11
Packing Instruction .......................................................... 11
NOTES:
1. Balanced and Unbalanced Outputs can be mixed.
For example, you may also use Balanced and
Unbalanced outputs simultaneously, connected to
different power amplifiers.
Purchase Date:
Dealer Name:
Customer Service
If at any time you have questions about your MQ109B
Enviromental Equalizer, please contact:
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-3512
FAX: 607-724-0549
Copyright 1997 ã by McIntosh Laboratory, Inc.
2
IMPORTANT SAFETY
INSTRUCTIONS!
Safety Instructions
8. Do not use attachments not recommended in this
owners manual as they may cause hazards.
PLEASE READ THEM BEFORE
OPERATING THIS EQUIPMENT.
WARNING SHOCK HAZARD DO NOT OPEN.
AVIS RISQUE DE CHOC NE PAS OUVRIR.
NO USER-SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO
QUALIFIED PERSONNEL
General:
1. Read all the safety and operating instructions, contained
in this owners manual, before operating this equipment.
2. Retain this owners manual for future reference about
safety and operating instructions.
3. Adhere to all warnings and operating instructions.
4. Follow all operating and use instructions.
5. Warning: To reduce risk of fire or electrical shock,
do not expose this equipment to rain or moisture.
This unit is capable of producing high sound pressure
levels. Continued exposure to high sound pressure
levels can cause permanent hearing impairment or
loss. User caution is advised and ear protection is
recommended when playing at high volumes.
6. Caution: to prevent electrical shock do not use this
(polarized) plug with an extension cord, receptacle or
other outlet unless the blades can be fully inserted to
prevent blade exposure.
Attention: pour pevenir les chocs elecriques pas
utiliser cette fiche polarisee avec un prolongateur, une
prise de courant ou un autre sortie de courant, sauf si
les lames peuvent etre inserees afond ans en laisser
aucune partie a decouvert.
7. For added protection for this product during a lightning
storm, or when it is left unattended and unused for long
periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent
damage to the product due to lightning or power line
surges.
Installation:
9. Locate the equipment for proper ventilation. For example, the equipment should not be placed on a bed,
sofa, rug, or similar surface that may block ventilation
openings; or, placed in a built-in installation, such as a
bookcase or cabinet, that may impede the flow of air
through the ventilation openings.
10. Locate the equipment away from heat sources such as
radiators, heat registers, stoves, or other appliance (including amplifiers) that produce heat.
11. Mount the equipment in a wall or cabinet only as described in this owners manual
12. Do not use this equipment near water; for example,
near a bathtub, washbowl, kitchen sink, laundry tub, in
a wet basement or near a swimming pool, etc.
13. Do not place this product on an unstable cart, stand,
tripod, bracket, or table. The equipment may fall, causing serious injury to a person, and serious damage to
the product.
Connection:
14. Connect this equipment only to the type of AC power
source as marked on the unit.
15. Route AC power cords so that they are not likely to be
walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from
the instrument.
16. Do not defeat the inherent design features of the polarized plug. Non-polarized line cord adapters will defeat
the safety provided by the polarized AC plug. If the
plug should fail to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug.
17. Do not overload wall outlets, extension cords or integral convenience receptacles as this can result in a risk
of fire or electric shock.
Care of Equipment:
18. Clean the instrument by dusting with a dry cloth. Unplug this equipment from the wall outlet and clean the
panel with a cloth moistened with a window cleaner. Do
not use liquid cleaners or aerosol cleaners.
19. Do not permit objects of any kind to be pushed and/or
fall into the equipment through enclosure openings.
3
Safety Instructions cont, Introduction,
Performance Features and Installation
Never spill liquids into the equipment through enclosure
openings.
20. Unplug the power cord from the AC power outlet when
left unused for a long period of time.
Repair of Equipment:
21. Unplug this equipment from the wall outlet and refer
servicing to a qualified service personnel under the following conditions:
A. The AC power cord or the plug has been damaged,
B. Objects have fallen, or liquid has been spilled into
the equipment,
C. The equipment has been exposed to rain or water,
D. The equipment does not operate normally by follow-
ing the operating instructions contained within this
owners manual. Adjust only those controls that are
covered by the operating instructions, as an im-
proper adjustment of other controls may result in
damage and will often require extensive work by a
qualified technician to restore the product to its nor-
mal operation,
E. The equipment has been dropped or damaged in any
way,
F. The equipment exhibits a distinct change in perfor-
mance - this indicates a need for service.
22. Do not attempt to service beyond that described in the
operating instructions. All other service should be referred to qualified service personnel.
23. When replacement parts are required, be sure the service technician has used replacement parts specified by
McIntosh or have the same characteristics as the original part. Unauthorized substitutions may result in fire,
electric shock, or other hazards.
24. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks
to determine that the product is in proper operating condition.
usually at frequencies of 1200Hz and lower. and can alter
frequency response as much as ± 30dB.
Standing waves or room resonances occur due to reflections of the sound from wall to wall, from floor to ceiling
and from any other room structures. These frequency response variations are the greatest in a cube shape room,
with equal dimensions from wall to wall and floor to ceiling.
A high quality loudspeaker with the ability to radiate perfectly uniform frequency response can have its sound characteristics changed drastically by a room with severe standing waves. In most every case the change will degrade the
listening. The most common effect is one or more peaks/dips
in the bass frequency range.
Performance Features
· Low Frequency Compensation
Low Frequency Compensating Control centered at 30Hz
allows bass centered at 30Hz to be boosted by up to 12dB.
· Five Equalizer Bands
Five Equalization bands centered at 50Hz, 80Hz, 150Hz,
300Hz and 600Hz. provide adjustment for the five most significant frequency bands which are affected by room acoustics.
· Variable Equalizer Controls
Five Boost and Cut Controls, one for each band. Each of
the five frequency bands can be boosted or cut by up to
12dB.
· Variable Q Controls
Five Q controls, one for each band. The Q or bandwidth of frequencies above and below the center frequencies
can be adjusted from a narrow with Q of 4 to a broad
bandwidth with a Q of 0.6.
Introduction
The MQ109-B Environmental Equalizer provides an easy
and convenient way to correct room acoustic conditions that
can affect the performance of a quality loudspeaker system.
Loudspeaker performance is affected by the listening room
due to loudspeaker location, position of the listener, room
dimensions, room surfaces, and reflections from furniture or
substructures in the room. The acoustic characteristics of a
typical listening room can affect loudspeaker performance
4
· Balanced and Unbalanced Connections
Both Balanced and Unbalanced Inputs and Outputs are provided.
Installation
The MQ109B can be placed upright on a table or shelf.
Cool operation ensures the longest possible operating life
for any electronic instrument. Do not install the MQ109B
directly above a heat generating component such as a high
powered amplifier.
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