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Run in procedure

FLI recommends that you follow the run in procedure for the subwoofer detailed 
below.

When your subwoofer is used for the 

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 rst time naturally like most brand new items it is very 

stiff and rigid, it will take time for the moving parts of this subwoofer to loosen up before it 
will be ready to deliver its full potential.

For the 

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 rst 30 hours it is recommended that you play the subwoofer initially at low to medium

volumes, gradually increasing the volume level as time progresses. As a guide, if you listen to it for 
1 hour every day it will take a month for the speaker to run in properly. You will notice a big change 
in the sound of the subwoofer over this period, as the spider and surround begin to run in the sound 
will get deeper and punchier, also the output of it will increase as the suspension loosens up.

A new subwoofer is like a new car engine, it needs a few thousand miles before you can drive it to its full 
potential, driving it into the ‘red line’ from the 

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 rst day will mean engine damage is certain and will not be 

covered by warranty and the same applies to the subwoofer. Failure to follow this simple procedure is the 
most common reason for a subwoofer to fail after a very short period of time.

Installation

The most common place to mount a bass enclosure is in the luggage compartment of the vehicle. Where in 
the luggage compartment it is mounted will have an effect on the sound produced allowing the user to tailor 
the sound to best suit their musical tastes. For example if the enclosure is mounted facing the rear bumper, 
the bass produced will be noticeably deeper than if it is 

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 red into the rear seat. 

Do not be afraid to experiment with positioning as a little time and effort can yield great improvements in 
sound.

Summary of Contents for UNDERGROUND FU10A

Page 1: ...UNDERGROUND INSTRUCTION INSTALLATION MANUAL MODEL FU10A FU12A FU12TA active enclosure...

Page 2: ...thoroughly Use caution when working near the fuel hydraulic lines and electrical wiring Observe the correct polarity when wiring improper phasing may cause a loss of bass response Ensure that no movi...

Page 3: ...put of it will increase as the suspension loosens up A new subwoofer is like a new car engine it needs a few thousand miles before you can drive it to its full potential driving it into the red line f...

Page 4: ...ith the power cable and is no further than eighteen inches away from the battery Please ensure that the fuse is not fitted until the entire installation procedure is complete The two tables below are...

Page 5: ...attention as the power cable and taken back to the source headunit and joined to the remote cable provided If the source headunit does not have a remote turn on cable then a 12v supply should be used...

Page 6: ...TROL High pass frequency control The frequency ranges from 50hz to 250 Hz E BASS BOOST CONTROL To provide up to an extra 6 dB of bass boost at 45 Hz Use this boost to increase bass output from the amp...

Page 7: ...an be heard in any of the speakers or until the volume reaches an uncomfortable listening level when this is reached turn down the gain control slightly The gain control is now set The setting of the...

Page 8: ...8 System Wiring Input connections BATTERY FUSE Connect to chassis ground of vehicle Connect to remote turn on lead of source unit SOURCE HEAD UNIT...

Page 9: ...utomatically when the units temperature goes above 80 degrees If the amplifier feels very hot then this may be the reason for the amplifier not starting Check that there is good airflow around the amp...

Page 10: ...e for your future reference For more information and to register your warranty online visit www fliaudio com warranty Model Driver Amplifier RMS power Peak power Impedance Height Depth Width FU12TA FU...

Page 11: ...graphics logos icons images data the selection and arrangement thereof are the property of FLI Audio herein referred to as FLI us or we and its affiliate or their content and technology providers and...

Page 12: ...watts 270 watts speakers FU 4 FU 5 FU 6 FU 69 FU 5c FU 6c FU 10 FU 12 FU 15 FU 360 FU 720 FU 1000 1 FU 1000 5 FU 10P FU 10A FU 12P FU 12A FU 12TP FU 12TA up to up to 1200 watts 1200 watts up to up to...

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