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| Fathom IWSPage 28
3) Polarity and Phase Adjustment
It is oen helpful to have a second person operating these controls so that you
can easily hear the changes from the primary listening seat.
Listening to familiar source material (preferably music with good upper bass
and midbass response), ip the “Polarity” switch from “0” to “180” and listen for
dierences. e correct setting will sound most natural with the best upper bass
punch and articulation. If both sound similar, choose “0”.
Once Polarity is set, use the same music material to audition dierent “Phase”
control settings and choose the one that further enhances the upper and midbass
response. If you can’t hear a dierence, set the control to “0.”
4) Extreme Low Frequency (e.l.f.) Trim
Use the “e.l.f. trim” control to adjust the extreme low bass extension of the
Fathom IWS. is control allows -12 dB of cut or +3 dB of boost at 28 Hertz and is
particularly useful when using a Fathom IWS (or two) in a small to medium sized
home theater. Since smaller enclosed spaces help to boost the level of the lowest bass
frequencies, smaller theaters can be overwhelmed by the strong low-bass output of
the Fathom IWS subwoofer. is can create a “thick” or “bloated” character in the
lower bass region. Turning down the “e.l.f. trim” knob cuts the extreme low bass
level and alleviates this condition. Feel free to experiment and listen to a variety of
demanding material until you nd the best match for your room and your tastes.
Your Fathom IWS is now optimized for maximum bass performance at your
listening seat. Congratulations!
IMPORTANT! IF YOU MOVE YOUR PRIMARY LISTENING SEAT IN THE
FUTURE, YOU WILL NEED TO RUN A.R.O. AGAIN. ANY PARTICULAR
CALIBRATION IS UNIQUE TO THAT PARTICULAR SUBWOOFER POSITION
AND LISTENING SEAT POSITION COMBINATION. SIMPLY FOLLOW THE
STEPS ABOVE TO CREATE A NEW CALIBRATION CURVE.
IMPORTANT
IMPORTANT! WRITE DOWN ALL SETTINGS PERFORMED IN STEPS 2-4 FOR
FUTURE REFERENCE.
IMPORTANT