3
Infinity Alpha 25
ES
Setting the Surround Configuration Selector
It is generally recommended that the selectable surround mode
configuration be set to Bipole. This will provide a large ambient
surround sound field while allowing for precise localization of
sound effects that the filmmaker has placed in the surround
tracks.
If the side walls on which the speaker will be mounted are more
than about 14' from the listening position, setting the Surround
Mode Configuration Switch to Monopole may offer improved
performance. It is also recommended that the Monopole position
be selected if the speakers will be mounted close to a corner, as
shown in Figure 2.
If you are using a receiver/processor with a THX
®
surround mode
and have selected the THX surround mode, it may be beneficial to
use the Dipole setting. This is a matter of personal preference
and may change depending on the individual film soundtrack. It
is also recommended that the Dipole setting be used with older
recordings that are only recorded with a Dolby* Pro Logic* (not
the newer Dolby Digital) soundtrack.
IMPORTANT NOTE:
The set of drivers that the arrow in Figure 3
points to should be installed toward the front of the room. It does
not matter whether or not the tweeter is positioned above or
below the woofer.
This will ensure proper operation and performance should the
Monopole or Dipole position on the surround mode configuration
switch be selected.
– Surround mode configuration switch.
BIPOLE
DIPOLE
MONOPOLE
F
IGURE
3
Placement (Application 2)
When using the Infinity Alpha 25
ES
as a rear speaker in a 6-
or 7-channel home theater system, refer to Figures 4 and 5.
The speaker(s) should be mounted on the rear wall facing the
listening area, between the side channel speakers. If you are
using one rear speaker, it should be mounted as close as
possible to the center of the listening area. When using two
rear speakers, they should be spaced evenly within the width
of the listening area.
Setting the Surround Configuration Selector
When used as a rear channel speaker in a 6- or 7-channel
system, it is recommended that the Surround Mode Configuration
Switch be set to Bipole, as shown in Figure 6.
Couch
Left
Front
Channel
Left
Side
Channel
Right
Side
Channel
Rear Center Channel
Right
Front
Channel
Center
Channel
Infinity
Subwoofer
(optional)
Couch
Left
Front
Channel
Left
Side
Channel
Left Rear Channel
Right Rear Channel
Right
Side
Channel
Right
Front
Channel
Center
Channel
Infinity
Subwoofer
(optional)
F
IGURE
4
– This overhead view shows a typical home
theater plan with a single rear-center surround channel.
F
IGURE
5
– This overhead view shows a typical home
theater plan when using two rear-channel speakers.
– Surround mode configuration switch.
BIPOLE
DIPOLE
MONOPOLE
F
IGURE
6
