Remote Turn-On
[FR–]
[FR+]
[SUB–]
[SUB+]
[FL–]
[FL+]
[SUB IN]
Sou rce [REM]
Batter y
Fuse 
(not included)
[+12V]
[GND]
[FRONT IN]
Thank you for purchasing a JL Audio amplifier for  
your sound system.
Your amplifier has been designed and manufactured to exacting  
standards in order to ensure years of musical enjoyment. 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 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 technical@jlaudio.com or call (954) 443–1100 during business hours.
OWNER’S MANUAL
600W 3-Channel Class D System Amplier
What’s Included 
(1) Amplifier
(4) Stainless steel mounting screws 
(1) User manual 
Product Description
This is a three-channel, system amplifier utilizing Class D technology for all 
channels.
 
Installation Applications 
This amplifier is designed for operation with 12 volt, negative-ground electrical 
systems. Using this product in systems 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. 
 
Safety Considerations
•  Whenever possible, mount the amplifier in a dry, well-ventilated location 
that does not interfere with other factory installed electronic devices. If a dry 
environment is not available, a location that is not exposed to heavy splashing 
may be used.
•  While this amplifier is designed to be water-resistant, it should never be 
submerged under water or subjected to high-pressure water spray.  
Do not install where it will be directly exposed to the elements.
•  Do not mount the amplifier in the engine compartment or in any areas of 
extreme heat.
•  Securely mount the amplifier so that it does not come loose in the  
event of a collision/sudden jolt or as a result of repeated vibrations during 
normal operation.
•  Check before drilling to make sure that you will not be drilling into an exterior 
panel/hull, fuel tank, gas/brake line, wiring harness, or other vital system.
•  Do not run system wiring outside or underneath the vehicle/vessel. This is an 
extremely dangerous practice, which can result in severe damage/injury.
•  Protect all system wires from sharp edges (metal, fiberglass, etc.) by  
carefully routing them, tying them down and using grommets and loom  
where appropriate.
•  Secure all wiring as needed, using cable ties or wire clamps to protect them 
from moving parts and sharp edges.
IPX7 Water Resistance Rating 
This product has been tested to withstand immersion in water, up to 1 meter 
(3.28 ft.) deep, for up to 30 minutes (with control panel cover properly installed). 
Note - while designed to be water resistant, this product should never be 
submerged under water for prolonged periods or subjected to activity that 
creates pressure on it that exceeds its depth rating.
Installation Procedure/Connections
1.  Disconnect the NEGATIVE battery post connection and secure the 
disconnected cable to prevent accidental reconnection during installation. 
This is an essential safety precaution during installation!
2.  Connect the RED power lead to the positive (+12V) battery post. 4 AWG is 
the minimum power wire size for this amplifier. 
3.  An appropriate fuse (sold separately), such as the JL Audio Water-Resistant 
Master MAXI™ Fuse Block (XD-MFBW-MAXI), at the main power wire(s) to 
the amplifier(s) is vital for vehicle/vessel safety. This fuse must be installed 
within 18 inches (45 cm) of the positive battery post connection. If this is 
the only device connected to this main wire, use a 60A fuse. Do not install 
the fuse until the power wire has been securely connected to the amplifier. 
4.  Connect the BLACK negative ground lead to a clean, solid metal grounding 
point near the amplifier. This can be to metal chassis ground, if available. 
If no metal chassis ground is available, it may be necessary to make this 
connection to the NEGATIVE battery post. 4 AWG is the minimum ground 
wire size for this amplifier. All ground connections (source unit and 
amplifiers) should be made at the same location.
5.  Connect the BLUE remote turn-on lead to the source unit’s positive (+12V) 
remote turn-on output. If your source unit does not have a dedicated 
remote turn-on output, the amplifier’s turn-on lead can be connected to 
+12V via a switch that derives power from an ignition-switched circuit. 
6.  Signal Input (Low-Level): Connect the amplifier’s RCA input jacks to the 
source unit’s preamp level output jacks. 
7.  Signal Input (High-Level): If your source unit does not offer preamp level 
signal outputs, you can splice the speaker output wires of the source unit 
onto a pair of RCA plugs for each input pair or use the JL Audio ECS Speaker 
Wire to RCA adaptor (XD-CLRAIC2-SW). Make sure to observe correct 
polarity in making “High-Level Input” connections. Failure to do so will result 
in a loss of signal (poor performance).
8.  Connect the speaker output leads to the corresponding speaker wires.
9.  Make necessary adjustments to the filter controls and input sensitivity. 
10.  The amplifier’s subwoofer output level can be controlled from the front 
of the vehicle/vessel with an optional remote level controller (sold 
separately). Use the RBC-1 for standard (dry) installations or the M-RBC-1 
for applications exposed to moisture. Connect the remote’s plug to the 
amplifier’s harness-mounted RJ11 input jack. (Refer to Appendix B)
   WARNING! Failure to make safe, tight, high-integrity power connections 
can result in fire and extensive damage! 
Control Setting Mode / Function
Front / Subwoofer
Input 
Voltage
Low RCA/Preamp Level Range (250 mV - 4 V)
High RCA/Preamp or Speaker Level Range (580 mV - 14 V)
Input 
Sens. Variable
Adjusts the input stage of each pair of amplifier channels to 
match the source unit’s output voltage for maximum clean 
output (refer to Appendix A)
Front
Input 
Mode
2CH
Applies two channels of input to all three 
amplifier channels. Main input signals will be 
combined to mono for the subwoofer channel.
Use Front 
Inputs Only
4CH
Sends four discrete channels to all four inputs. 
L & R Sub Inputs will be combined to mono. 
If only one channel of subwoofer signal is 
available, we recommend using a Y-adaptor to 
feed both Sub Inputs.
Use Front 
and Sub 
Inputs
Filter  
Freq. (Hz) Variable Adjusts the high-pass filter cutoff frequency, variable from 
35-300 Hz, 12 dB/Octave
Subwoofer
Output 
Polarity
0Normal speaker polarity
180 deg. Polarity reversed 180 degrees
Infrasonic 
Filter (Hz) Variable Adjusts the high-pass filter cutoff frequency, variable from 
20-40 Hz, 12 dB/Octave
LP Filter 
Freq. (Hz) Variable Adjusts the low-pass filter cutoff frequency, variable from 
40-400 Hz, 24 dB/Octave
Bass  
Boost (dB) Variable
Boost-Only Bass Equalizer: Boost range from 0dB (full-
counterclockwise) to + 12dB (full-clockwise), centered  
at 43 Hz. 
Control Panel Settings and Adjustments 
The amplifier’s settings and controls are located on the bottom panel beneath a 
gasketed, protective cover. Remove the four Phillips head screws from the center 
panel to access the controls and make adjustments. Replace cover when finished 
and mount the amplifier.
Power Connections
Label Wire Color Description
+12V Red Positive (+12V) Power Connection
GND Black Negative (GND) Ground Connection
REM Blue Positive (+12V) Remote Turn-On Input
Inputs
Label Plug Description
FRONT 
IN
White RCA Ch. 1 / Front Left Channel Signal Input
Red RCA Ch. 2 / Front Right Channel Signal Input
SUB  
IN
White RCA Ch. 3 / Left Subwoofer  
Channel Signal Input
Note: L & R Sub Inputs will be 
combined to mono. If only one 
channel of subwoofer signal is 
available, we recommend using a 
Y-adaptor to feed both Sub Inputs.
Red RCA Ch. 4 / Right Subwoofer 
Channel Signal Input
Outputs
Label Wire Color Description
FL+ White Ch. 1 (+) Positive Front Left Speaker Front Bridged (+) 
FL– White/Black (–) Negative Front Left Speaker
FR+ Gray Ch. 2 (+) Positive Front Right Speaker
FR– Gray/Black (–) Negative Front Right Speaker Front Bridged (–)
SUB+ Lt. Blue Ch. 3 (+) Positive Subwoofer Output
SUB– Lt. Blue/Black (–) Negative Subwoofer Output
Optional
Remote Bass  
Control Jack RJ11 Input Jack for M-RBC-1 or RBC-1 (each sold separately)
Connections
IPX7
WATER
RESISTANT
Power  
Connections
Wiring Diagram
Outputs: 
To Speakers
Inputs: 
High-Level 
< or > 
Low-Level 
(selectable via  
 Input Voltage  
switch  for each  
channel pair) 
Optional: 
M-RBC-1 
Remote  
Bass Control 
(sold separately)