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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 so as 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

Summary of Contents for G2250

Page 1: ...ise 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 so as 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...

Page 2: ... not mount the amplifier in the engine compartment under the vehicle on the roof or in any other area that will expose the amplifier circuitry to the elements Protect Your Hearing We value you as a long term customer For that reason we urge you to practice restraint in the operation of this product so as not to damage your hearing and that of others in your vehicle Studies have shown that continuo...

Page 3: ...ert the bare wire into the terminal block seating it firmly so that no bare wire is exposed While holding the wire in the terminal tighten the set screw firmly taking care not to strip the head of the screw and making sure that the wire not the insulation is firmly gripped by the set screw Product Description The JL Audio G2250 is a two channel full range audio amplifier utilizing patented Absolut...

Page 4: ...P mode 80 Hz is a good baseline Filter Freq Hz setting After properly adjusting the Input Sens as outlined in Appendix A page 12 you can fine tune the Filter Freq Hz control to achieve the desired system frequency response Input Section The G2250 s input section allows you to send signals to the amplifier section through the use of two differential balanced inputs one for the left channel and one ...

Page 5: ...dually reducing power output if the amplifier s safe operating temperature is exceeded The amplifier will continue to operate and return to normal power output once its temperature returns to a normal range BASS BOOST CONTROLS 1 Bass Boost This switch allows the user to activate a 6 dB boost centered at 48 Hz When the Bass Boost is activated the inputs to CH 1 Left and CH 2 Right are summed to cre...

Page 6: ...e installation or setup of the amplifier not covered in this manual please contact your dealer or technical support JL Audio Technical Support 954 443 1100 9 00 AM 5 30 PM Eastern Time Zone Monday Friday Low Voltage protection If the car s supply voltage drops below 10 volts the entire amplifier will shut itself off to protect its internal circuitry The green Power indicator will turn off when thi...

Page 7: ...f channels 50 Hz for subwoofer channels 1 kHz for a midrange application Do not use attenuated test tones 10 dB 20 dB etc The Nine Step Procedure 1 Disconnect the speaker s from the amplifier s speaker output connectors 2 Turn off all processing bass treble loudness EQ etc on the source unit processors if used and amplifier Set fader control to center position and subwoofer level control to 3 4 of...

Page 8: ...k The speaker wire connectors are designed to accept up to 8 AWG wire Make sure to strip the wire to allow for a sufficient connection with the metal inside the terminal block How do I properly set the input sensitivity on my amplifier Please refer to Appendix A page 12 to set the input sensitivity for maximum low distortion output My amplifier doesn t turn on Check the fuse not just visually but ...

Page 9: ...INSTALLATION NOTES Use this diagram to document your amplifier s switch and control positions 16 JL AUDIO G2250 JL AUDIO G2250 17 ...

Page 10: ...INSTALLATION NOTES INSTALLATION NOTES 18 JL AUDIO G2250 JL AUDIO G2250 19 ...

Page 11: ...nd you may also have other rights which vary from state to state If you need service on your JL AUDIO product All warranty returns should be sent to JL AUDIO s Amplifier Service Facility freight prepaid through an authorized JL AUDIO dealer and must be accompanied by proof of purchase a copy of the original sales receipt Direct returns from consumers or non authorized dealers will be refused unles...

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