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 | Fathom 

IWS

Page 4

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 IWS in Your Listening Room:  . . . . . . . . . . . . . . . . . . . . . .  6-10
Front Control Panel Layout: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Rear Control and Connector Panel Layout:   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Front Panel Controls in Detail:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-15
Connecting your Fathom IWS(s):  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-23
Recommended Setup Procedure:   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-28
Frequently Asked Questions:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
Troubleshooting:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Limited Warranty / Service Information:  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Specifications: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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.

We sincerely thank you for your purchase and invite you to read this 

manual thoroughly in order to achieve the highest level of performance with 

your Fathom IWS subwoofer system. Enjoy.

Jl AUDIO TECHNOlOGIES INClUDED 

IN Fathom IWS 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.

Concentric Tube Suspension 

(U.S. Patent #5,734,132 & #6,095,280)

The suspension technology of the Fathom 

IWS driver permits high linear excursions 

within a very shallow frame design.
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.
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.

Содержание Fathom IWS-SYS-1

Страница 1: ...IWS SYS 1 IWS SYS 2 Owner s Manual...

Страница 2: ...sources such as radiators heat registers stoves fireplaces or other devices which produce heat Do not place candles on top of or near the subwoofer or amplifier 10 Power sources The subwoofer should o...

Страница 3: ...d b objects have fallen or liquid has been spilled into the subwoofer c the subwoofer has been exposed to rain d the subwoofer does not appear to operate normally or exhibits a marked change in perfor...

Страница 4: ...arch 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...

Страница 5: ...peaker impedance allowing us to take full advantage of each driver s full excursion envelope The beautiful cabinet enclosing the workings of your Fathom is also the result of careful engineering To co...

Страница 6: ...s your listening seat can be in a peak or dip region so can your subwoofer When placed in a room corner a subwoofer maximally excites the room s mode structure creating the strongest output with the f...

Страница 7: ...n bass performance BEST SEATING POSITIONS Most accurate bass performance COMPROMISED SEATING POSITIONS More intense but less accurate bass performance WORST SEAT CENTERLINE OF ROOM APPROX 1 3 OF TOTAL...

Страница 8: ...rack 3 The Fathom IWS amplifier also includes table top hardware Special front panel end covers that replace the rack ears and rubber feet are included with the IWS amp To use the amp on a table top s...

Страница 9: ...ong the front wall near the front left and right speakers or at the center points of opposing walls as shown at right Experimentation with listener placement is recommended to achieve the best results...

Страница 10: ...bass response for a large listening area can be achieved using four subwoofers placing one at the midpoint of each of the four walls although using two or three subwoofers can be almost as good Exper...

Страница 11: ...om IWS subwoofer A R O page 12 13 Power page 12 Input Mode page 13 Level Mode page 13 Master Level page 14 Lights page 14 LP Filter page 14 LP freq Hz page 14 e l f trim dB page 15 phase deg page 15 P...

Страница 12: ...as desired If this happens remove the Y cable adaptor or look for the noise source in the upstream components Automatic Room Optimization A R O A powerful feature of the JL Audio Fathom IWS subwoofers...

Страница 13: ...start Should this happen simply wait for the Demo sequence to end and try again Calibrate Button During the ARO test sequence the Calibrate button s green LED will blink quickly to alert the user to t...

Страница 14: ...utterworth alignment 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...

Страница 15: ...g the phase switch you instantly convert that peak into a trough or amplitude dip Because the effect of the Polarity switch is immediate it compliments the operation of the Phase control and cannot be...

Страница 16: ...and right input jacks are provided for systems without a dedicated mono subwoofer connection This typically applies to two channel audio equipment Appropriate balanced cables are available from your J...

Страница 17: ...receivers and preamplifier processors Separate left and right RCA type input jacks are provided for systems without a dedicated mono subwoofer connection This typically applies to two channel audio eq...

Страница 18: ...ction any further If your installation incorporates two or more Fathom IWS amplifiers you will designate one Fathom IWS as the Master and all others in the system as Slave via the Master Slave switch...

Страница 19: ...ut to Slave signal carries any signal processing selected on the Master Fathom IWS including the Master Level setting and A R O processing to further Fathom IWSs operating in Slave mode From Fathom IW...

Страница 20: ...ced RCA type connector Balanced connections provide superior noise rejection and ensure proper grounding between components If your receiver or processor has balanced outputs we highly recommend that...

Страница 21: ...uts we highly recommend that you use them to connect to the Fathom IWS designated as the master In the connection diagram at right balanced connections are shown as solid lines unbalanced connections...

Страница 22: ...sover and are comfortable running your main speakers full range you can split your preamplifier s output signals using appropriate Y connectors in place of the active crossover shown in the diagram Tw...

Страница 23: ...connection types are available for connecting the Fathom IWSs to your two channel audio system balanced XLR or 1 4 inch TRS connector and unbalanced RCA type connector Balanced connections provide su...

Страница 24: ...o the primary listening seat including the subwoofer s distance Use a tape measure to determine these distances time coherence is important If multiple Fathom IWSs are being used average their distanc...

Страница 25: ...he unit connected directly to your receiver or preamp processor is indicating Master on its Input Mode lights and that all other units are indicating Slave on their Input Mode lights If not you will n...

Страница 26: ...bwoofer at your primary listening seat and apply a powerful equalizer to tame the peaks caused by room modes resulting in smoother more accurate bass performance If you are using multiple Fathom IWSs...

Страница 27: ...wait for the Demo sequence to end and try again You can perform a new calibration by following the normal procedure outlined above 2 Level Setting Using familiar music or movie material with deep bass...

Страница 28: ...oost at 28 Hertz and is particularly useful when using a Fathom IWS or two in a small to medium sized home theater Since smaller enclosed spaces help to boost the level of the lowest bass frequencies...

Страница 29: ...ted on the inputs When powered down only housekeeping circuits remain on which draw negligible amounts of power from the wall less than 10 watts Should I unplug my subwoofer during a thunderstorm or e...

Страница 30: ...manual especially if any upstream components cables etc have recently changed 2 Turn off the Fathom IWS disconnect all its input and output signal cables turn the Fathom IWS back on If the noise disa...

Страница 31: ...ot allow limitations on implied warranties therefore these exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to sta...

Страница 32: ...of 10k Ohms Balanced Inputs Stereo or Mono two female XLR jacks Input Impedance of 10k Ohms Output To Slave Balanced one male XLR jack Input Modes Master or Slave Level Modes Reference fixed gain or...

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