Unpacking The Subwoofer - Infinity Primus PS-8 Owner's Manual

Infinity Primus™ Series
The Primus series of loudspeakers and powered subwoofers continues
Infinity's longstanding commitment to accurate sound reproduction. Our
proprietary technologies and engineering resources result in uncompro-
mised performance in any stereo or multichannel home theater.

Unpacking the Subwoofer

If you suspect damage from transit, report it immediately to your dealer.
Keep the shipping carton and packing materials for future use.
P
LACEMENT
Since the installation of a subwoofer can be somewhat more complicated
than installing full-range speakers, it is essential that you read this section
very carefully prior to connecting the subwoofer to your system. Should you
have questions relating to your installation, it is advisable to call your
dealer.
The performance of the subwoofer is directly related to its placement in
the listening room and how you align the subwoofer with its satellite speak-
ers. Setting the volume of the subwoofer in relationship to the left and right
speakers is also of critical importance because it is essential that the sub-
woofer integrate smoothly with the entire system. Setting the subwoofer's
volume level too high will result in an overpowering, boomy bass. Setting
the volume level too low will negate the benefits of the subwoofer.
Here are several additional facts on installation that may prove useful. It is
generally believed by most audio authorities that low frequencies (below
125Hz) are nondirectional and, therefore, placement of a subwoofer within
any listening room is not critical. While in theory it is true that the larger
wavelengths of extremely low frequencies are basically nondirectional, the
fact is that, when installing a subwoofer within the limited confines of a
room, reflections, standing waves and absorptions generated within the
room will strongly influence the performance of any subwoofer system.As a
result, specific location of the subwoofer becomes important, and we
strongly recommend that you experiment with placement before choosing a
final location.
Placement will depend upon your room and the amount and quality of bass
required (for example, whether or not your room permits placement of the
subwoofer near either satellite).
Be sure to leave a minimum of six inches between the wall and the port on
the subwoofer.
Figure 1. This example shows the subwoofer positioned behind the right-
channel satellite speaker to re-create the actual location of bass instru-
ments in an orchestra and/or add impact to movie soundtracks.
SUB
RIGHT-
CHANNEL
SPEAKER
PRIMARY
LISTENING
AREA
PRIMUS PS-8 3