JL Audio Fathom SA-600W Owner's Manual page 30

e) Within 5 seconds of selecting "Calibrate", return to your primary listening
seat and hold the microphone in your normal, seated head position at the
approximate height of your ears.
f) A low rumbling noise sequence will be played through the subwoofer
system that sounds like distant thunder. The sequence will last
approximately 3 minutes. During this process, the D.A.R.O. system is
taking a frequency response measurement at your seat and correcting
the problems it finds. The D.A.R.O. system also compensates for any
before & after level differences so that your subwoofer will have a similar
perceived loudness after the calibration process. When D.A.R.O. is finished
calibrating, the "Calibrate" button will turn grey and the word "Calibrated"
will appear in green underneath, indicating a successful calibration.
To clear the D.A.R.O. settings (i.e., return them to flat) & turn off the
"Calibrated" indication, select "Clear DARO", then select "CONFIRM
CLEAR" to verify.
Should you wish to run a completely new calibration, simply repeat
Steps A-F. There is no need to erase the old calibration first. Any new calibration
will overwrite the existing data.
IMPORTANT! IF YOU MOVE YOUR PRIMARY LISTENING SEAT IN THE
FUTURE, YOU WILL NEED TO RUN D.A.R.O. AGAIN. ANY PARTICULAR
CALIBRATION IS UNIQUE TO THAT PARTICULAR SUBWOOFER POSITION
AND LISTENING SEAT POSITION COMBINATION.
2) Level Setting (GAIN)
Using familiar music material with deep bass content, adjust the subwoofer level
to blend with the other speakers using the Variable "GAIN" function on the SA-
600W. The subwoofer output level can be raised by up to 15 dB and can be attenuated
by 30+ dB, if needed.
We recommend starting with the bass level a little bit too low and then, carefully
raising the subwoofer output bit by bit until a perfect balance is achieved.
Inadvertently having the bass too loud (even a couple of dBs) can mask midbass detail.
3) Polarity
It is often 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), switch the "POLARITY" from "0 deg" to "180 deg" and listen for
differences. This effect will be most noticeable in the small frequency region around
the crossover point. The correct setting will sound most natural with the best upper
bass punch and articulation. If both sound similar, choose "0".
Page 30
IMPORTANT
| Fathom SA-600W