MK Sound S-150P THX - Manual (Page 8)

On Figure 2, the length of line A - B should be about the same as the length of line X - Y.
(They may not seem to be the same in this diagram due to an optical illusion). Try to follow the
formula as close as you can. You can fine tune the placement by listening to a source with an
image (such as a vocalist) centered between the speakers. When listening in stereo (no Center
Channel speaker), move the speakers closer together or farther apart in small increments until
you hear the sharpest and most cohesive image, especially in the phantom center. You may also
want to angle (or "toe-in") the speakers slightly. This often improves the sharpness of the stereo
image, reduces room colorations, and provides a wider seating area. The angled front baffles of
your speakers also provide this benefit.
D. VERTICAL ORIENTATION
The Performance of your speakers is dependent on their orientation. THX speakers are
designed for controlled vertical dispersion and wide horizontal dispersion. By controlling the
vertical dispersion, we limit the amount of sound that would otherwise be reflected with a time
delay from the floor and ceiling (for reasons discussed in B above).
This means the speakers should always be vertically oriented. The S-150P is vertically
oriented with its tweeters are vertically stacked (not next to each other). When vertical, the
controlled dispersion is in the correct plane. If they are oriented horizontally (on their sides),
listeners right and left of a direct line from the center of the speaker will hear a compromised
sound quality, an irregular frequency response, as well as some other problems. While this may
be acceptable for background listening, we strongly recommend that you do not place them on
their sides for any other listening. S-150P must be oriented vertically (tweeters in a vertical line)
to meet THX requirements.
8. THX Audio System
If your M&K speakers are being used in a Home THX Audio system, placement is very
important. You should take at least the same amount if time and care in setting up your M&K
Home THX speakers as you would with the most exotic high-end stereo system. Some listeners
LEFT SPEAKER RIGHT SPEAKER
Line X - Y should equal
line A - B. (line A - B appears
longer in this diagram due
to an optical illusion
).
B
X Y
A
S- 150 P THX Manual
FIGURE 1