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3

ENGLISH

PLANNING YOUR INSTALLATION

It is important that you take the time to read  

this manual and that you plan out your 
installation carefully. The following are some 
considerations that you must take into account 
when planning your installation. 
 

Cooling Efficiency Considerations: 

The outer shell of your JL Audio amplifier 

is designed to remove heat from the amplifier 
circuitry. For optimum cooling performance, 
this outer shell should be exposed to as large a 
volume of air as possible. Enclosing the amplifier 
in a small, poorly ventilated chamber can 
lead to excessive heat build-up and degraded 
performance. If an installation calls for an 
enclosure around the amplifier, we recommend 
that this enclosure be ventilated with the aid  
of a fan. In normal applications, fan-cooling  
is not necessary. 

I M P O RTA N T

!

 

Mounting the amplifier upside down is  
strongly discouraged.

If mounting the amplifier under a seat,  

make sure there is at least 1 inch (2.5 cm) of  
space above the amplifier’s outer shell to permit  
proper cooling.

Safety Considerations: 

Your amplifier needs to be installed in a dry,  

well-ventilated environment and in a manner  
which does not interfere with your vehicle’s safety 
equipment (air bags, seat belt systems, ABS brake 
systems, etc.). You should also take the time to 
securely mount the amplifier so that it does not 
come loose in the event of a collision or a sudden 
jolt to the vehicle. 
 

Stupid Mistakes to Avoid 

t

Check before drilling any holes in your vehicle 
to make sure that you will not be drilling 
through a gas tank, brake line, wiring harness or 
other vital vehicle system.

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the vehicle. This is an extremely dangerous 
practice which can result in severe damage to 
your vehicle and person.

t1SPUFDUBMMTZTUFNXJSFTGSPNTIBSQNFUBM

 

edges and wear by carefully routing them,  
tying them down and using grommets and  
loom where appropriate.

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compartment, under the vehicle, on the roof  
or in any other area that will expose the 
amplifier circuitry to the elements. 

Remote Turn-On 

Connector

(pg. 6)

Chassis Ground 

Connector

(pg. 5)

Left & Right

Preamp Output Jacks

(pg. 10)

+12 V Power 

Connector

(pg. 5)

Mono

Subwoofer Outputs

(pg. 10)

Jack for

Remote Level

Control Knob

(pg. 9)

Left & Right Preamp 

Input Jacks

(pg. 7)

Содержание NexD XD300/1

Страница 1: ...on equipment to ensure optimum performance from this product Should you decide to install the amplifier yourself please take the time to read this manual thoroughly so as to familiarize yourself with...

Страница 2: ...io system in a manner that still allows you to hear necessary noises to operate your vehicle safely horns sirens etc SERIAL NUMBER In the event that your amplifier requires service or is ever stolen y...

Страница 3: ...amplifier needs to be installed in a dry well ventilated environment and in a manner which does not interfere with your vehicle s safety equipment air bags seat belt systems ABS brake systems etc You...

Страница 4: ...signal cables and remote turn on wire from the source unit to the final amplifier mounting location 5 Run speaker cables from the speaker systems to the amplifier mounting location 6 Find a good soli...

Страница 5: ...care not to strip the head of the screw The ground connection should be made using 4 AWG wire and should be kept as short as possible while accessing a solid piece of sheet metal in the vehicle The su...

Страница 6: ...XJUDI UIBU EFSJWFT power from an ignition switched circuit 5IF 9 T iRemotew UVSO PO DPOOFDUPS JT EFTJHOFE UP BDDFQU 8 o 8 XJSF 5P connect the remote turn on wire to the amplifier first back out the se...

Страница 7: ...a pair of RCA plugs for each input pair or use VEJP QBSU 9 3 48 P iMJOF PVUQVU DPOWFSUFSw JT OFFEFE JO NPTU DBTFT If you find that the output cannot be reduced sufficiently with a direct speaker level...

Страница 8: ...via the LP Filter Mode Slopew TXJUDI FQFOEJOH PO UIF TVCXPPGFS TZTUFN BOE the vehicle different slopes may be required to produce a smooth transition to the mid bass speakers in the system Experiment...

Страница 9: ...tation the audio will mute completely At full clockwise rotation the level XJMM CF UIF TBNF BT JG UIF 3 XBT OPU connected at all In other words it operates strictly as a level attenuator PREOUTS 5IF 9...

Страница 10: ...er to initiate a protection mode which reduces power output STATUS LED PROTECTION CIRCUITRY 5IFSF JT B TJOHMF NVMUJ DPMPS PO UIF UPQ surface of the amplifier to indicate the amplifier s operating stat...

Страница 11: ...or malfunctions please return it to your authorized JL Audio dealer so that it may be sent in to JL Audio for service There are no user serviceable parts or fuses inside the amplifier The unique natur...

Страница 12: ...adjustment according to the nominal impedance of the speaker system connected to the amplifier outputs 6 Verify that you have disconnected the speakers CFGPSF QSPDFFEJOH 1MBZ B USBDL XJUI BO appropri...

Страница 13: ...Amplifier Topology NexD High Speed Class D Power Supply Unregulated MOSFET switching type Rated Power at 14 4V with less than 1 THD Noise 20Hz 20 kHz 200W RMS x 1 4 ohms 300W RMS x 1 2 ohms Rated Pow...

Страница 14: ...is required To test for this problem jump the i 12VDCw wire to the iRemotew terminal to see if the amplifier turns on I hear a repetitive ticking or popping sound coming out of the speaker s Check th...

Страница 15: ...t while an appropriate test tone is played through the source unit disconnect the input cables from the amplifier prior to this test The frequency used should be in the range that is to be amplified b...

Страница 16: ...16 JL Audio XD300 1 Owner s Manual 17 ENGLISH INSTALLATION NOTES Use this diagram to document your amplifier s switch and control positions...

Страница 17: ...inal purchase at retail and no warranties whether express or implied shall apply to this product thereafter Some states do not allow limitations on implied warranties therefore these exclusions may no...

Страница 18: ...Printed in China XD300 1 MAN 08 2010 w w w j l a u d i o c o m...

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