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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 our Technical Support Department  

at (954) 443-1100 during business hours.

OWNER’S MANUAL

320W 4-Channel, Full-Range Amplifier

Summary of Contents for J2320.4

Page 1: ...lation 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 w...

Page 2: ...t continuous exposure to high sound pressure levels can lead to permanent irreparable hearing loss This and all other high power amplifiers are capable of producing such high sound pressure levels whe...

Page 3: ...20 4 is a four channel full range audio amplifier utilizing Class B technology for all channels The J2 320 4 can be operated with a wide variety of source units and system configurations For detailed...

Page 4: ...hieve the desired system balance Do not increase any Input Sens setting for any channel s of any amplifier in the system beyond the maximum level established during the procedure outlined in Appendix...

Page 5: ...distortion and possible speaker failure Correct use of these filters can substantially increase the longevity and fidelity of your audio system Filter Frequency Hz High Pass 60 1 2k Low Pass 40 150 H...

Page 6: ...ridged each channel produces signals of equal magnitude but opposite polarity The combined output of the two channels provides twice the output voltage available from a single channel The J2 320 4 has...

Page 7: ...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 maximum If connected set the amplifier s Remo...

Page 8: ...tors 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...

Page 9: ...z Filter Frequency Hz Input Sens Input Sens CH 3 4 Input From min max min max 60 1 2k High Pass 60 1 2k 40 150 Low Pass 40 150 Off 12dB High Level Inputs High Level Inputs Bass Boost HP Off LP Filter...

Page 10: ...18 JL Audio 19 INSTALLATION NOTES INSTALLATION NOTES...

Page 11: ...product thereafter Some states do not allow limitations on implied warranties therefore these exclusions may not apply to you This warranty gives you specific legal rights and you may also have other...

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