configurations. You may find it convenient to take advantage of the technical knowledge and
experience of your Mcintosh dealer to assist you in the setup procedure.
Reproducing Dolby Surround movie soundtracks with Dolby Pro Logic decoding requires
a specific selection and location of loudspeakers. If you are using the optional THX-M module
in your C39 for Home THX Audio processing, the requirements are even more specific.
Mcintosh has introduced the HT Home Theater line of loudspeakers specifically designed
for home theater use. These loudspeakers include models for Left Front, Center and Right
Front, Surround Sound and a Subwoofer. The Mcintosh HT loudspeakers are licensed for Home
THX® Audio, and are ideal for reproducing Dolby Surround encoded movie soundtracks us-
ing Dolby Pro Logic decoding as well as Home THX® Audio processing enhancement. These
loudspeakers also reproduce normal stereo music sources such as a compact disc with
outstanding fidelity.
Mcintosh is also manufacturing the Model MC7106, six channel power amplifier, specifically
designed for Home Theater use. The MC7106 is also licensed for Home THX Audio and in-
cludes a convenient 25 conductor THX connector that accommodates a computer type cable
to receive all six audio channels and AC power control from a matching connector on a C39
Control Center.
Dolby Pro Logic decoding produces four specific channels of audio information from a Dolby
Surround encoded soundtrack. These channels include Left Front, Center, Right Front and
Surround sound.
The front left and right loudspeakers provide the fundamental two channel stereo music
and sound. The center channel is called the dialog channel since it also reproduces sound-
track dialog information. A center channel greatly increases the intelligibility of spoken dialog.
The three front loudspeakers should have wide horizontal sound dispersion to allow the
effective area for audience participation to be spread as wide as possible in the home theater
room. The vertical acoustic dispersion of the front speakers should be restricted to avoid
floor and ceiling reflections that could interfere with the indirect reflected surround sounds.
The Dolby Pro Logic decoded surround sound signal is mono, but requires two separate
loudspeakers. One is mounted on the left wall of the listening area and the other on the right
wall. They should be approximately at or slightly above ear height. For the correct ambience
effect, surround sound must be non directional and reflected from the room wall surfaces
rather than directly from the loudspeakers.
The addition of a subwoofer can greatly enhance the enjoyment of your home theater. A
subwoofer can reproduce the exciting low frequency music and sound effects of today's ac-
tion movies with a dramatic impact. Since a subwoofer is inherently non directional, it can
be placed in a variety of room locations. A good subwoofer also allows the optional use of
smaller and less conspicuous loudspeakers in the front and center locations.
Home THX Audio specifies that a subwoofer be used. The C39 includes the required cur-
cuits to feed the correct bass signals of 80Hz and lower to the output that feeds the sub-
woofer power amplifier.
22
HOW TO
SET UP YOUR
MclNTOSH
HOME THEATER
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