TROUBLESHOOTING
No sound from subwoofer.
1.Verify that Fathom is plugged in, turned “ON” & that front panel lights are “ON”. If the Fathom will not power up, check the circuit breaker that feeds its outlet.
2.Test subwoofer using DEMO button on front panel – if sub emits demo tones the subwoofer’s internal circuitry is fine and an input problem is likely. Check the input cable connections at the Fathom and at the receiver/preamp/ processor.
3.Verify that your receiver’s subwoofer settings have not changed
4.If your other speakers play, but the Fathom does not, try changing the cable that connects the Fathom to the system.
5.If the problem persists, call your dealer or JL Audio Technical Support for assistance.
The bass level has changed.
1.Make sure your level settings (on the Fathom and in your receiver/preamp/ processor) have not changed.
2.If you are using the Fathom’s “Master Level” knob to set the subwoofer level, confirm that the “Level Mode” switch is set to “Variable”.
3.Verify the position of the ELF Trim knob.
Hums or other unusual noises from your Fathom
1.See Input Mode discussion on page 20 of this manual, especially if any upstream components, cables, etc., have recently changed.
2.Turn off the Fathom, disconnect all its input and output signal cables, turn the Fathom back on. If the noise disappears, the noise is being caused elsewhere in your system.
Bass sounds “muddy” or “too heavy”.
1.Try decreasing the 25 Hertz level using the “e.l.f. trim” control. Muddy bass can sometimes be caused by too much low frequency output in a moderately sized room.
2.Decrease the overall subwoofer level.
3.Verify your receiver’s subwoofer settings.
4.Try a different subwoofer or main listening seat location. Changing one or the other can have a HUGE effect on how your system sounds. See the placement discussion on pages
Your Fathom is clearly audible outside of your house.
1.Revisit the “Master Level” setting on your Fathom(s) or your home theater receiver/preamp/processor.
2.Inquire with your JL Audio dealer about noise isolation strategies.
3.Move the Fathom away from windows.
Angry neighbors knocking at your door.
Invite them in and offer them a beverage.
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