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Thank you for purchasing a JL Audio amplifier for  

your automotive sound system.

Your amplifier has been designed and manufactured to exacting  

standards in order to ensure years of musical enjoyment in your vehicle. 

For maximum performance, we highly recommend that you have  

your new amplifier installed by an authorized JL Audio dealer. Your 

authorized dealer has the training, expertise and installation 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 to familiarize yourself  

with its installation requirements and setup procedures.

If you have any questions regarding the instructions in this  

manual or any aspect of your amplifier’s operation, please contact your 

authorized JL Audio dealer for assistance. If you need further assistance, 

please call the JL Audio Technical Support Department  

at (954) 443–1100 during business hours.

OWNER’S MANUAL

300W Monoblock Subwoofer Amplifier

Summary of Contents for XD300/1v2

Page 1: ...ation 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 to familiarize yourself with its...

Page 2: ...exposure to high volume levels While driving operate your audio system in a manner that still allows you to hear necessary noises to operate your vehicle safely horns sirens etc SERIAL NUMBER In the...

Page 3: ...ier 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...

Page 4: ...mote 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 solid metal grounding poi...

Page 5: ...rew firmly taking care not to strip the head of the screw The ground connection should be made using 8 or 4 AWG wire and should be kept as short as possible while accessing a solid piece of sheet meta...

Page 6: ...ristics of the audio signal one of the following methods may work better than the other We recommend trying DC Offset Sensing first as it does not require a long delay to turn the system off after the...

Page 7: ...p level signals as well as speaker level output from source units and small amplifiers To use speaker level sources splice the speaker output wires of the source unit or small amplifier onto a pair of...

Page 8: ...a steep 24dB per octave slope via the LP Filter Mode Slope switch Depending on the subwoofer system and the vehicle different slopes may be required to produce a smooth transition to the mid bass spea...

Page 9: ...a level attenuator PREOUTS The XD300 1v2 incorporates a buffered pass through preamp output section so that additional amplifiers can be easily added to the system The preamp output delivers the same...

Page 10: ...which reduces power output STATUS LED PROTECTION CIRCUITRY There is a single multi color LED on the top surface of the amplifier to indicate the amplifier s operating status Rem Offset Signal Input V...

Page 11: ...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 nature...

Page 12: ...etermine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to the amplifier outputs 6 Verify that you have disconnected the speaker...

Page 13: ...h Speed Class D Power Supply Unregulated MOSFET switching type Rated Power at 14 4V with less than 1 THD Noise 20Hz 20 kHz RMS Method 200W RMS x 1 4 ohms 250W RMS x 1 3 ohms 300W RMS x 1 2 ohms Rated...

Page 14: ...ay is required To test for this problem jump the 12VDC wire to the Remote terminal to see if the amplifier turns on I hear a repetitive ticking or popping sound coming out of the speaker s Check the s...

Page 15: ...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 by...

Page 16: ...16 JL Audio XD300 1v2 Owner s Manual INSTALLATION NOTES Use this diagram to document your amplifier s switch and control positions Rem O Input Low Turn Monoblock Subwoofer Amplifier...

Page 17: ...17 Rem Offset Signal Input Voltage Low High Turn On Mode...

Page 18: ...18 JL Audio XD300 1v2 Owner s Manual INSTALLATION NOTES...

Page 19: ...19...

Page 20: ...etail 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 not apply to you Thi...

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