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1)  Left Channel Only or Right Channel Only 

Information:  If you wish to send a left-only 
or right-only signal to the M500/3’s main 
channels you must use a “Y-Adaptor” to split 

the single channel signal into both left and 

right RCA inputs of the bridged channel 

pair. This option is used when deploying the 
M500/3’s main channels to drive left channel 
speakers only or right channel speakers only.

2)  Left + Right Channel Information:  When 

bridged and fed by a stereo source signal, the 
M500/3’s main channels will automatically 
combine the left and right input signals into a 
summed mono (left + right) input signal. This 
can be useful to drive a center speaker.

SUBWOOFER OUTPUTS

The M500/3’s single subwoofer channel is 

designed to deliver power into subwoofer loads 
equal to or greater than 2 ohms. It is rated for 
300W into 2 ohms, 250W into 3 ohms and 200W 
into 4 ohms (Continuous Power, RMS Method).

IMPORTANT

!

 

Subwoofer loads below 2 ohms nominal are not 

recommended and may cause the amplifier  

to initiate a protection mode which 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 
block, using the supplied 2.5 mm hex wrench. 
Strip 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 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 wire clamp in the terminal.

 

INPUT SECTION

(L)

(R)

Remote

Level

Control

CH. 1&2

SUB CH.

Preouts

+12 VDC

Ground

Remote

CH. 1

(L)

CH. 2

(R)

Bridged

Mono Subwoofer Output

You will notice that there are two “+” positive 

connections and two “” negative connections. 
This is to facilitate multiple subwoofer wiring.  

The two positive and two negative connections 

are connected in parallel inside the amplifier 

They are not stereo outputs. Connecting two 
subwoofers, each to one set of positive and 
negative terminals, will result in a parallel 
subwoofer connection. If only connecting one 
pair of subwoofer wires, it is not necessary to use 
both sets of connections. 

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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