JL Audio M500/3 Owner's Manual

2  |  JL Audio - M500/3 Owner’s Manual  

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 vessel. 
Studies have shown that 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 when connected 
to a speaker system. Please limit your continuous 
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 vessel safely (horns, 
sirens, etc.).

In the event that your amplifier requires 

service or is ever stolen, you will need 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 
amplifier packaging. 
 
Serial Number:  
 

This amplifier is designed for operation in 

vessels with 12 volt, negative-ground electrical 
systems. Use of this product in vessels with 
positive ground and/or voltages other than 12V 
may result in damage to the product and will void 
the warranty.

This product is not certified or approved for 

use in aircraft.

Do not attempt to “bridge” the outputs of this 

amplifier with the outputs of a second amplifier, 
including an identical one.

Ch. 1 & 2 Filter 

Frequency

Selector

(pg. 8)

Ch. 1 & 2 

Filter Mode

Selection

(pg. 8)

Ch. 1 & 2 Input

Sensitivity Control

(pg. 7)

Sub. Ch. Input

Sensitivity Control

(pg. 7)

Input 

Mode 

Switch

(pg. 7)

Preout

Selector

(pg. 7)

Status

LED

(pg. 11)

Sub. Ch. Input

Sensitivity Control

(pg. 7)

Remote 

Level Mode 

Switch

(pg. 9)

Sub. Ch. 

Filter Mode

Selection

(pg. 8)