Recommended Setup Procedure - JL Audio Fathom f112 Owner's Manual

RECOMMENDED SETUP PROCEDURES
1) Preparation for Setup Process: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-27
2) Level Setting: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3) Polarity/Phase Adjustment: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4) Experiment with Location: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5) Apply A.R.O: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
6) Adjust E.L.F. Trim: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
PREPARATION FOR SETUP PROCESS:
Please confi rm the following system settings before beginning the setup
process. Th is will ensure a neutral starting point and an eff ective setup of your
subwoofer system.
Note: For 220-240V models, confi rm that the IEC power switch is turned on
( | ) before turning on the front panel power switch. Do not operate the rear panel
main power switch with the front panel power switch in the "On" or "Auto" position.
On your Home Theater Receiver or Preamp/Processor:
Before beginning setup of your Fathom subwoofer system we recommend
that you set your receiver or preamp/processor as follows (please turn off all
Fathoms in the system via their front panel power switches prior to making these
adjustments):
1. Speaker Size
In the speaker setup menu of your receiver or preamp/processor, set up all of
your high-frequency speakers as "small" with a crossover point of 80 Hz. Th is
will send ALL bass to the Fathom(s).
2. Speaker Distance
In the speaker setup menu, properly set all speaker distances to the primary
listening seat, including the subwoofer's distance. Use a tape measure to
determine these distances (time coherence is important.) If multiple Fathoms
are being used, average their distances to the primary listening seat and use
that number to set the subwoofer distance.
3. Subwoofer Level
Set the subwoofer level in the receiver or preamp/processor "0" or its middle
position.
4. Tone Controls / Equalizers
Set all tone controls to "0" and defeat all equalizer features.
On your Active Crossover or Bass Management Processor:
If you are using an active crossover or bass-management processor, we
recommend that you set it as follows before beginning setup of your Fathom
subwoofer system (please turn off all Fathoms in the system prior to making
these adjustments):
1. Low-Pass Filter Frequency
Select a low-pass fi lter frequency of 80 Hz (12dB/octave slope)
2. High-Pass Filter Frequency
Select a high-pass fi lter frequency of 80 Hz (12dB/octave slope)
3. Low-Pass (Subwoofer) Output Level
Set the subwoofer output level to "0" or its middle position.
Page 26 | Fathom f112 & f113