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INTRODUCTION

This instruction manual is for your safety and must be adhered to at all times. Please read 

and ensure that you fully understand the installation and set up procedures as explained. 

If you are unclear on the installation or set up of your FLI UNDERGROUND ampli

fi

 er  please 

contact your nearest authorised FLI UNDERGROUND dealer.

Thank you for purchasing this FLI UNDERGROUND ampli

fi

 er. It will provide you 

with years of trouble free usage providing you follow a few simple guidelines.

2

WARNING

DO NOT EXPOSE THIS PRODUCT TO DAMP OR MOISTURE

 - doing so may result in 

fi

 re, 

shock or damage to the product.

BEFORE WIRING DISCONNECT THE CABLE FROM THE POSITIVE BATTERY TERMINAL

 

- failure to do so may result in electric shock or injury.

ENSURE GOOD AND CORRECT CONNECTIONS

 - failure to make the correct connections 

may result in 

fi

 re or damage to the product.

KEEP THE VOLUME AT A LEVEL SO YOU CAN STILL HEAR OUTSIDE NOISE

 - failure to do 

this may result in an accident. FLI UNDERGROUND equipment is capable of producing sound 
levels that can permanently damage your hearing. FLI UNDERGROUND recommends caution 
when listening at high volume. For safe and enjoyable listening the sound should be comfortable 
and clear without distortion.

CAUTION

• Never connect any speaker lead to the car chassis. This can cause severe damage to your 

speaker / car radio / ampli

fi

 er. 

• Before drilling or cutting any holes, investigate the layout of your vehicle 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 moving parts catch on the speaker or grill (e.g. window or door handles, or 

window glass inside the door)

INSTALLATION

• The quality of the installation will affect the system performance and reliability.
• Contact your nearest authorised FLI dealer if you are unsure about the installation of this 

product.

• Please mount this unit away from any potential hazards.
• Minimising the length of wires will provide higher audio output from the system.
• The speaker should be securely fastened to the mounting position using the screws 

provided.

• Pre drill your mounting holes using a drill and position with the template provided.
• Be sure to investigate your mounting area thoroughly for electrical wires, brake or fuel lines or 

fuel tank to prevent causing any damage.

BLE F

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ONNECTIONS

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Содержание UNDERGROUND FU720.4

Страница 1: ...UNDERGROUND INSTRUCTION INSTALLATION MANUAL MODEL FU720 4 AMPLIFIER FU720 4...

Страница 2: ...y 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 moving parts c...

Страница 3: ...th 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 t...

Страница 4: ...flatten the car battery RCA Cables Depending on the model number of your amplifier and the number of speakers you wish to power you will have to run either one or two RCA cables from the source to th...

Страница 5: ...tection mode the light will illuminate red Set Up Section To correctly set the gain control of the amplifier to match that of the source headunit use the following setup routine Turn the gain control...

Страница 6: ...he supplied high to low level converter loom BATTERY FUSE Connect to chassis ground of vehicle SOURCE HEAD UNIT Connect to remote turn on lead of source unit SOURCE HEAD UNIT High to Low Level convert...

Страница 7: ...7 System Wiring 4 Channel Stereo System Wiring 2 Channel Stereo Bridged mono MIN 2 MIN 2 MIN 2 MIN 4...

Страница 8: ...res and reset the amplifier If the protection LED still comes on then the amplifier is faulty This damage may have been caused by either failure to follow these setup guidelines or abuse AMPLIFIER GET...

Страница 9: ...9 notes...

Страница 10: ...ype 2 1 channel 4 3 2 channel monoblock 5 4 3 channel Class AB AB D AB 4 ohm stereo 2 x 70 watts RMS 4 x 70 watts RMS N A 4 x 70 watts RMS 2 ohm stereo 2 x 90 watts RMS 4 x 90 watts RMS N A 4 x 90 wat...

Страница 11: ...raphics 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 a...

Страница 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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