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Thank you for purchasing a JL Audio amplifier for  

your marine sound system. 

Your amplifier has been designed and manufactured to exacting 

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

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

500W Marine 3-Channel Amplifier

Summary of Contents for M500/3

Page 1: ...n 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 i...

Page 2: ...to have a record of the product s serial number Please take the time to enter that number in the space provided below The serial number can be found on the bottom panel of the amplifier and on the amp...

Page 3: ...g the supplied screws so that it does not come loose in the event of a collision or a sudden jolt to the vessel Stupid Mistakes to Avoid Check before drilling any holes in your vessel to make sure tha...

Page 4: ...power wire has been securely connected to the amplifier 4 Connect negative power wire to the negative battery post Use the same size power wire as the wire connected to the 12V connection minimum 4 A...

Page 5: ...p 1 2 inch 12 mm of insulation from the end of each wire and insert the bare wire into the terminal block seating it firmly so that no bare wire is exposed While holding the wire in place tighten the...

Page 6: ...t to strip the head of the screw and making sure that the wire not the insulation is firmly gripped by the wire clamp in the terminal INPUT SECTION L R Remote Level Control CH 1 2 SUB CH Preouts 12 VD...

Page 7: ...h channel section can be used to match the source unit s output voltage to the input stage of each group of amplifier channels for maximum clean output Rotating the control clockwise will result in hi...

Page 8: ...switch in each Channel Section Channel 1 2 Filter 2dB octave High Pass only Off Defeats the filter completely allowing the full range of frequencies present at the inputs to feed these channels This i...

Page 9: ...at all In other words it operates strictly as a level attenuator Remote Level Mode Switch This switch allows you to assign the operation of the HD RLC to the entire amplifier or only the subwoofer ch...

Page 10: ...combining the output of two amplifier channels to drive a single load When bridged each channel produces signals of equal magnitude but opposite polarity The combined output of the two channels provid...

Page 11: ...h reduces power output The M500 3 s subwoofer outputs are designed to accept 16 AWG 8 AWG wire To connect the subwoofer wires to the amplifier first back out the set screws on the top of the terminal...

Page 12: ...tput Over current conditions can be caused by a speaker impedance lower than the optimum load impedance range for the amplifier or a short circuit in the speaker wiring The latter can result from a sh...

Page 13: ...amplifiers requires specifically trained service personnel Do not attempt to service the amplifier yourself or through unauthorized repair facilities This will not only void the warranty but may resu...

Page 14: ...cted the speakers before proceeding Play a track with an appropriate sine wave within the frequency range to be amplified by the channel you are adjusting at 3 4 source unit volume 7 Connect the AC vo...

Page 15: ...s S N Ratio A weighted 20 Hz 20 kHz noise bandwidth Main Channels 104 dB referred to rated power 84 dB referred to 1W Subwoofer Channel 103dB referred to rated power 83dB referred to 1W Frequency Resp...

Page 16: ...r this problem jump the 12VDC wire to the Remote terminal to see if the amplifier turns on I get a repetitive ticking or popping sound coming out of the speaker s Check the speaker wires for a possibl...

Page 17: ...it 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...

Page 18: ...18 JL Audio M500 3 Owner s Manual INSTALLATION NOTES Use this diagram to document your amplifier s switch and control positions...

Page 19: ...19...

Page 20: ...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 not apply to you T...

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