Positioning - Infinity BU-2 Owner's Manual

POSITIONING
Since the installation of a subwoofer is somewhat more
complicated than installing full range speakers, k is essential
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 either your dealer or
Infinity's Customer Service Department for advice.
The performance of the subwoofer is directly related to its
placement in the listening room and how you align the
subwoofer with.its satellite speakers. Setting the volume of the
subw0ofer in relationship to the left and right speakers is also
of critical importance because it is essential that the subwoofer
integrates 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 effect of the subwoofer.
The metal plate acts as the heat sink for the subwoofer's
internal amplifier. Do not place pillows or other objects
against it.
We recommend placing the BU-2 at least. 2 to 3 feet away
from a television or a computer's disc drive system to prevent
smearing the colors of the TV picture or erasure of the
magnetic drive.
Here are several additional facts on installation which may
prove useful. It is generally believed by most audio authorities
that low frequencies (below 125 Hz) are non-directional and,
therefore, placement of a subwoofer within any listening room
is not critical. While in theory it is true that extremely low
frequencies because of their larger wave lengths are basically
non-directional, the fact is 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 subwogfer becomes important, and we strongly
recommend that you experiment with room placement before
choosing a final location.
Placement will depend upon your room and the amount
and quality of bass required. For example, if your room
permits placement of the subwoofer near either satellite.
Never place the port too close to a wall or piece of furniture, as
this will prevent the port from operating properly. Since the
port is an integral part of the subwoofer's design, it should
always be permitted free access to the listening room without
obstruction to the pressure emerging from it. Careful
experimentation will enable you to determine the best position
for the subwoofer.
Here are some useful hints:
1. Experimentation with the port direction may be useful. Ax-'-
times directing the port away from the listening area (to the
side) may be advantageous because this may create a better
blend of bass within the listening room.
2. If bass response seems inadequate, move it closer to a wall
or corner. If bass becomes too heavy, try turning the"
subwoofer with the port facing away from the wall. This will
tend to diminish bass output.
It will take time and patience to find the most pleasing
acoustic location for your subwoofer. Testing for sonic balance
and blending should always be made for your normal listening
position using a wide range of source material. As a starting
point, initially place the subwoofer behind your right channel
satellite speaker, about 3 or 4 inches from the wall (We
suggest trying this location first because in an orchestra, the
bass instruments are usually located in the back and to the
right.) R_er to Figure 1.
BU-2SUB
RIGHT
CHANNEL
SATELLITE
PRIMARY
LISTENING
AREA'
Figure 1