JL Audio Fathom f113v2 Owner's Manual page 16

Master Level Knob
The Master Level Knob is used to control the output level of the Fathom v2
when the Variable Level mode is selected on the front control panel.
When rotated fully counter-clockwise, the Fathom v2's output will be fully
muted. When at the "0" or vertical position, the Variable gain level matches the
Reference level setting. When turned fully clockwise, the Fathom v2's output level
is 15 dB higher than the Reference setting.
Lights
The "Lights" selector switch allows the user to select one of three indicator
light modes.
"Off" turns off all of the front panel LED's at all times.
"Dim" sets all of the front panel LEDs to a low brightness level when the
Fathom v2 is turned on.
"On" sets all of the front panel LEDs to full brightness level when the Fathom
v2 is turned on.
IMPORTANT! WHEN TROUBLESHOOTING OR CALIBRATING THE D.A.R.O.
FEATURE, MAKE SURE THAT THE "LIGHTS" SWITCH IS SET TO "DIM" or "ON."
LP Filter
The Low Pass (LP) Filter selector switch determines the operating mode of the
Fathom v2's built-in low pass filter.
Digital Automatic Room Optimization
"Off" defeats the low pass filter, completely removing this circuit from the
Power
signal path.
"12 dB" sets the roll off slope of the low pass filter to a 12 dB per octave slope
o | on | auto
(Butterworth alignment).
calibration mic. demo
"24 dB" sets the roll off slope of the low pass filter to a 24 dB per octave slope
(Linkwitz-Riley alignment).
The 24 dB setting more aggressively attenuates high frequencies above the LP
Frequency setting (see below). If you are using the Fathom v2's built-in low pass
filter, experiment with the LP Filter slope setting to achieve the best transition
to your satellite speakers. If you prefer to use the filters and bass management
features in your receiver or preamplifier, defeat the on-board filter by selecting
the "Off" position.
LP Freq
The Low Pass (LP) Frequency selector knob allows the user to choose the roll-
off frequency of the Fathom v2's internal low pass filter. The frequency is variable
Digital Automatic Room Optimization
between 30 Hz (full counter-clockwise) to 130 Hz (full clockwise). This knob does
not affect the input signal in any way if the LP Filter switch is set to "Off". 80 Hz
is a commonly used filter frequency and usually serves as a good starting point
for adjustments.
calibration mic. demo defeat
EN | Pg 16
Digital Automatic Room Optimization
Power
o | on | auto
calibration mic. demo
Digital Automatic Room Optimization
Power
o | on | auto
calibration mic. demo
Input Mode
master | slave
defeat calibrate
Input Mode Level Mode
master | slave ref. | variable
calibrate
Input Mode
master | slave
defeat calibrate
Input Mode
master | slave
defeat calibrate
0
Level Mode
ref. | variable
-∞
max
Master Level
0
Lights
o | dim | on
-∞
max
Master Level
0
Level Mode
ref. | variable
-∞
max
Master Level
0
Level Mode
ref. | variable
-∞
max
Master Level
IMPORTANT
Lights LP Filter
o | dim | on o | 12dB | 24dB
LP freq. (Hz)
LP Filter
o | 12dB | 24dB
LP freq. (Hz)
Lights LP Filter
o | dim | on o | 12dB | 24dB
LP freq. (Hz
Lights LP Filter
o | dim | on o | 12dB | 24dB
LP freq. (Hz)
e.l.f. trim (dB) phase (deg.)
Polarity
0 | 180 deg.
e.l.f. trim (dB) phase (deg.)
| Fathom
v2
®