JL Audio Gotham g213 Owner's Manual page 15

| Gotham g213
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 Gotham will return to its previously set operating condition.
Defeat Button
Th e "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. Th is is a great way to audibly verify what eff ect 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
Th e Calibrate button activates the ARO test sequence. Th e calibration routine
will not start unless the supplied JL Audio test microphone is plugged into the
Gotham subwoofer. Once the calibration routine is complete, the green light
in the center of the "Calibrate" button will light and remain illuminated. Th ese
settings are stored by the Gotham 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
Th e Input Mode indicator LEDs show the input mode, either "Master" or
"Slave", selected by the switch on the Gotham's back panel (unless the "Lights"
switch is set to "off "). For further details, see page 20.
Level Mode
Th e two-position Level Mode switch allows you to select between the
following modes:
"Reference"
In this mode, the Master Level control knob has no eff ect on the Gotham's
output level. Use this setting if you will primarily be controlling the subwoofer
level via your receiver or preamplifi er/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
Gotham subwoofer. Th is mode is also useful when level matching the Gotham
subwoofer to a pair of stereo speakers in a two-channel system. Variable level
operation is needed for proper A.R.O. calibration.
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