JL Audio fathom v2 User Manual

| Fathom v2Page 16
Master Level Knob
e 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
e “Lights” selector switch allows the user to select one of three indicator
light modes.
“O” turns o 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
e Low Pass (LP) Filter selector switch determines the operating mode of the
Fathom v2’s built-in low pass lter.
“O” defeats the low pass lter, completely removing this circuit from the
signal path.
“12 dB” sets the roll o slope of the low pass lter to a 12 dB per octave slope
(Butterworth alignment).
“24 dB” sets the roll o slope of the low pass lter to a 24 dB per octave slope
(Linkwitz-Riley alignment).
e 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
lter, experiment with the LP Filter slope setting to achieve the best transition
to your satellite speakers. If you prefer to use the lters and bass management
features in your receiver or preamplier, defeat the on-board lter by selecting
the “O” position.
LP Freq
e Low Pass (LP) Frequency selector knob allows the user to choose the roll-
o frequency of the Fathom v2’s internal low pass lter. e frequency is variable
between 30 Hz (full counter-clockwise) to 130 Hz (full clockwise). is knob does
not aect the input signal in any way if the LP Filter switch is set to “O”. 80 Hz
is a commonly used lter frequency and usually serves as a good starting point
for adjustments.
LP freq. (Hz) e.l.f. trim (dB) phase (deg.)
Polarity
0
|
180 deg.
LP Filter
o
|
12dB
|
24dB
Master Level
max
0
Lights
o
|
dim
|
on
-∞
Level Mode
ref.
|
variable
Input Mode
master
|
slave
calibration mic. demo defeat calibrate
Power
o
|
on
|
auto
Digital Automatic Room Optimization
LP freq. (Hz) e.l.f. trim (dB) phase (deg.)
Polarity
0
|
180 deg.
LP Filter
o
|
12dB
|
24dB
Master Level
max
0
Lights
o
|
dim
|
on
-∞
Level Mode
ref.
|
variable
Input Mode
master
|
slave
calibration mic. demo defeat calibrate
Power
o
|
on
|
auto
Digital Automatic Room Optimization
LP freq. (Hz) e.l.f. trim (dB) phase (deg.)
Polarity
0
|
180 deg.
LP Filter
o
|
12dB
|
24dB
Master Level
max
0
Lights
o
|
dim
|
on
-∞
Level Mode
ref.
|
variable
Input Mode
master
|
slave
calibration mic. demo defeat calibrate
Power
o
|
on
|
auto
Digital Automatic Room Optimization
LP freq. (Hz) e.l.f. trim (dB) phase (deg.)
Polarity
0
|
180 deg.
LP Filter
o
|
12dB
|
24dB
Master Level
max
0
Lights
o
|
dim
|
on
-∞
Level Mode
ref.
|
variable
Input Mode
master
|
slave
calibration mic. demo defeat calibrate
Power
o
|
on
|
auto
Digital Automatic Room Optimization
IMPORTANT

JL Audio fathom v2 Specifications

General

Brand	JL Audio
Model	fathom v2
Category	Subwoofer
Language	English