Barefoot Sound MicroMain45 User Manual - page 9
8
7.2 Vertical Orientation
For center channel applications it might be desirable to
stand the MicroMain45 in the vertical orientation. This
orientation is acceptable, however, it does sacrifice
horizontal dispersion. Section 13 shows off-axis frequency
response graphs in the horizontal (13.1) and vertical (13.2)
planes for the MM45 mounted in the normal horizontal
orientation. One can see the horizontal off-axis response is
smoother than the vertical off-axis response. Standing the
MM45 vertically, therefore, makes the frequency response
less smooth compared to the normal orientation when the
listener moves from side to side. Nonetheless, the response
is still quite good out to 15 degrees off-axis and provides a
reasonably large sweet spot.
All the same positioning principles that are described here in
Section 7 apply to the vertical speaker orientation as well.
7.3 Cooling Concerns
While the Hypex amplifier modules that drive the
MicroMain45 are a very efficient, the speaker still
generates a significant amount of heat that must
be dissipated. This heat is transmitted to the air
via convection from the rear amplifier plate. In
order to ensure proper airflow, a minimum of
3” (76mm) clearance should be maintained
between the speaker and any large obstructions
like walls. An ambient room temperature below
30°C (85°F) should be maintained. Over-
temperature may cause the speaker to overheat
and shut down.