Demo Button
The Demo button triggers a 20 second long tone sequence that briefly demonstrates the signals used during A.R.O. calibration. The Demo function is useful for showcasing the output capability of the Fathom and to verify that the Fathom (or multiple Fathoms) are operational during system troubleshooting.
To activate the demonstration sequence, press and hold the “Demo” button for approximately 2 seconds (this built in delay helps prevent accidental activation). Pressing and holding the “Demo” button will activate the demo sequence even if the A.R.O. defeat function is active (see below.) Once the demonstration sequence is complete, the Fathom will return to its previously set operating condition.
Defeat Button
The “Defeat” button turns off or “defeats” the A.R.O. calibration system and equalizer. Use this feature when you want to be sure that the A.R.O.’s equalization is not in the signal chain. You can also use the “Defeat” button to audition both the normal and the A.R.O. optimized settings in your home theater room. This is a great way to audibly verify what effect the A.R.O. has in your room.
If “Demo” or “Calibrate” is pressed while the defeat function is active, “Defeat” is automatically canceled. No other front panel controls will alter the A.R.O. Defeat state.
Calibrate Button
The Calibrate button activates the ARO test sequence. The calibration routine will not start unless the supplied JL Audio test microphone is plugged into the Fathom subwoofer. Once the calibration routine is complete, the green light in the center of the “Calibrate” button will light and remain illuminated. These settings are stored by the Fathom and will remain in memory even if power is disconnected.
During the ARO test sequence the Calibrate button’s green LED will alert the user to two special conditions:
1.“Subwoofer level too low for A.R.O. calibration” via slow blinking, approximately one blink per second
2.“Subwoofer level too high for A.R.O. calibration”, approximately three blinks per second.
Input Mode Indicators
The Input Mode indicator LEDs show the input mode, either “Master” or “Slave”, selected by the switch on the Fathom’s back panel (unless the “Lights” switch is set to “off ”). For further details, see page 20.
Level Mode
The
“Reference”
In this mode, the Master Level control knob has no effect on the Fathom’s output level. Use this setting if you will primarily be controlling the subwoofer level via your receiver or preamplifier/processor. For those of us with small children or overenthusiastic teenagers, this mode of operation will prevent direct manipulation of the Master Level.
“Variable”
In this mode, the Master Level control knob determines the output level of the Fathom subwoofer. This mode is also useful when level matching the Fathom subwoofer to a pair of stereo speakers in a
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