lines that apply to both types of systems in terms of achieving optimum performance.
• Select speakers designed to meet your system requirements. Don’t, for example, flush-
mount a book shelf speaker designed for different mounting applications. If the room is quite
large, you may require two or more subwoofers to achieve optimum performance.
Acoustically dead rooms may require higher efficiency speakers to achieve louder sound
levels.
If you have questions regarding the proper installation of your speakers, consult your dealer
or the manufacturer.
MAIN LEFT, CENTER, RIGHT SPEAKERS (LCR)
• The Left and Right front (L/R) speakers should be placed close to the edges of the screen
to eliminate the disorientation which results when sounds appear to occur well away from
their visual on-screen location. Some allowance must be made for those installations involv-
ing screens smaller than five or six feet measured diagonally. Placing the speakers immedi-
ately beside a small screen usually reduces stereo separation to unacceptable levels. Some
experimentation may be in order, but as a rule of thumb, try to place the L/R front speakers
no more than 18" to 24" from the sides of the screen.
• Try to avoid placing the L/R front speakers too close to side walls or room corners. They
should usually be placed no closer than 18" to 24" from corners and side walls. Conventional
speakers should be toed in slightly towards the seating areas. THX–certified speakers will
usually require no toe in, however some toe in will assure even lateral coverage of the seat-
ing area and reduced side-wall reflections.
•
THX LCR speakers
are designed to be used
vertically only.
If they
must be either above or
below the screen they
must be properly aimed
towards the listener.
Proper aiming is critical
because THX speakers
are intentionally quite
directional in the vertical
plane to focus sound
energy to improve dialog
intelligibility and image
localization.
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• Reduces reflections from floor and ceiling
• Projects more direct energy toward listeners
© 1990 LUCASA THX
Home THX Front Loudspeakers
Controlled Vertical Dispersion
Elements of the Home THX Audio System:
