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| Fathom IWSPage 6
PLACING YOUR FATHOM IWS CABINETS IN YOUR LISTENING ROOM:
Your listening room or theater is an integral part of your sound reproduction
system. e physical dimensions of the room and its furnishings, materials,
doors and windows play an important role in dening how your system sounds.
When you place a sound source in an enclosed rectangular space, “standing
waves” are created, resulting from the relationship between the sound’s
wavelength and your room’s dimensions. In other words, standing waves result
from sound energy that is trapped in the room as it bounces back and forth
between opposing walls. Standing waves in the room create acoustic peaks and
dips where the sound is either louder or soer, based solely on your physical
position in the room. Energy also “builds up” at the room’s boundaries, creating
exaggerated bass response at certain frequencies. ese fundamental room
resonances are called room “modes.”
e moral of this mode story is to try and avoid seating positions in standing
wave peak or dip regions. It is highly recommended that you place your listening
chairs in areas where modal peaks and dips are moderate and do not reinforce
one another. e two most obvious areas to avoid are those near the exact center
of the room and those close to any of the room’s walls.
Just as your listening seat can be in a peak or dip region, so can your
subwoofer. When placed in a room corner, a subwoofer maximally excites the
room’s mode structure, creating the strongest output with the fewest dips. When
the subwoofer is pulled away from a corner or wall, the room modes are excited
less, which can alter the sound at your listening seat.
Be sure to experiment with both your listening seat position and subwoofer
position to nd the best solution. Careful experimentation usually leads to a
superior sounding system. Use our setup suggestions (illustrated on the opposing
page and the following pages) to get you started.
If you cannot avoid placing your sofa against the back wall or your
subwoofer in a less than optimal position, all is not lost. Your Fathom IWS’s
Automatic Room Optimization (A.R.O.) System can dramatically improve
these less-than-ideal situations.
We recommend that you begin by placing your Fathom IWS enclosure in
the front of the room, near the front le or right speaker, but not directly in
the corner of the room. Because the IWS enclosures are built into the walls,
you cannot move them later if the corner-loaded bass turns out to be too strong.
Please refer to the following illustrations for further placement ideas.
We recommend that you avoid placing the Fathom IWS enclosures near
windows to prevent rattling and sound transmission to the outside world.
If you are planning to install your Fathom
IWS amplier inside a cabinet, please refer
to the guidelines on page 8.