Table Of Contents; Introduction - JL Audio Fathom f112 Owner's Manual

FCC COMPlIANCE STATEMENT
NOTE: This equipment has been tested and found to comply with the limits of Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.

TABlE OF CONTENTS

Important Safety Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Introduction:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Product Overview: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Placing your Fathom in Your Listening Room: . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Unpacking your Fathom: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Front Control Panel Layout: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Rear Control and Connector Panel Layout: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Front Panel Controls in Detail: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-17
Connecting your Fathom(s): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-25
Recommended Setup Procedure: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-30
Frequently Asked Questions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cleaning Your Fathom: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Troubleshooting: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Limited Warranty / Service Information: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Specifications: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

INTRODUCTION

Congratulations on your purchase of a JL Audio Fathom powered subwoofer
system. This product has been critically engineered to deliver exceptional
performance in your home theater or audio system for many years to come.
As a company, we are intensely committed to core research into
high-performance loudspeaker and amplifier technologies. JL Audio's long-
excursion subwoofer driver designs are widely considered as reference standards for
linear behavior and high output. We have also focused our efforts to create powerful
amplifier and signal-processing technologies specifically aimed at delivering
exceptional low-frequency performance. Your Fathom combines these core
disciplines within a compact, beautifully crafted package to deliver an unparalleled
listening experience.
Page 4
Jl AUDIO TECHNOlOGIES INClUDED
IN FATHOM SUBWOOFERS
DMA-Optimized Motor System
DMA is JL Audio's proprietary Dynamic
Motor Analysis system aimed at
improving dynamic motor behavior. As a
result of DMA optimization, loudspeaker
motors remain linear in force over an
extreme range of excursion and also
maintain a highly stable fixed magnetic
field over a wide power range. This leads
to vastly reduced distortion and faithfully
reproduced transients... or put simply:
tight, clean, articulate bass.
OverRoll™ Surround
(U.S. Patent #5,687,247 and #5,949,898)
The OverRoll™ surround spans over
the driver's mounting flange, utilizing
available diameter wasted in conventional
speakers. This allows the use of the wider
roll necessary to control high-excursions
without sacrificing precious cone area.
W-Cone™ (U.S. Patent #6,496,590)
The W-Cone™ is a unit-body cone
assembly that delivers astonishing cone
stiffness with minimal mass.
Floating-Cone™ Attach Method
(U.S. Patent #6,501,844)
This assembly technique ensures proper
surround geometry in the assembled
speaker for better excursion control and
dynamic voice coil alignment.
Plateau-Reinforced Spider Attachment
(U.S. Patent #6,118,884)
This high-integrity suspension attachment
relieves stress from the spider material at
high-excursions for enhanced reliability.
Elevated Frame Cooling Technology
(U.S. Patent #6,219,431 and #6,229,902)
Delivers cool air, through slots directly
above the top-plate, to the voice coil of the
speaker. This enhances power handling
and sound quality by minimizing
dynamic parameter shifts and power
compression.
Radially Cross-Drilled Pole Piece
(U.S. Patent #6,243,479)
This innovative venting system greatly
enhances thermal dissipation and power
handling by directing air flow onto the
voice coil former, working in conjunction
with the Elevated Frame technology.
High-Damping Feedback Circuit
(U.S. Patent #6,441,685)
This proprietary, discrete control circuit
design allows our Class D switching
amplifiers to maintain an excellent
damping factor for improved transient
behavior and fidelity.
| Fathom f112 & f113