Protect Your Hearing; Installation Applications; What's Included - JL Audio RD400/4 Owner's Manual

PROTECT YOUR HEARING!

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 vehicle.
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 vehicle safely (horns,
sirens, etc.).
SERIAL NUMBER
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:
4 Channel Amplifier
+12 VDC Ground
2 | JL Audio - RD400/4 Owner's Manual
Input
Mode
(pg. 7) (pg. 10-11)
Input
Turn-On
Voltage
Mode
(pg. 7)
(pg. 6)
Left
or
CH. 1 CH. 3
Mono
Right
CH. 2 CH. 4
Only
Remote

INSTALLATION APPLICATIONS

This amplifier is designed for operation in
vehicles with 12 volt, negative-ground electrical
systems. Use of this product in vehicles 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.

WHAT'S INCLUDED

(1) RD400/4 amplifier
(1) Control panel cover (removable)
(1) Round logo badge
(1) 2.5 mm hex wrench
(1) User manual
Status
Ch. 1 & 2 Ch. 1 & 2 Input
LED Input Type Sensitivity Control
(pg. 7)
Ch. 1 & 2 Ch. 1 & 2 Filter
Filter Mode Frequency
Selector Selector
(pg. 8)
(pg. 8)
Turn On Mode Input Type
Stereo | Mono
Filter Mode
O | HP | LP
CHANNELS 1 & 2
(L)
(R)
CH. 1
(L)
Ch. 3 & 4 Ch. 3 & 4 Input
Input Type Sensitivity Control
(pg. 7-8) (pg. 7) (pg. 7-8)
Ch. 1 & 2 Ch. 3 & 4
Clipping Filter Mode
Indicator Selector
(pg. 7-8) (pg. 8)
Input Sensitivity Input Type Input Sensitivity
Stereo | Mono
Filter Mode
O | HP | LP
Filter Freq. (Hz) Filter Freq. (Hz)
CHANNELS 3 & 4
CH. 2 CH. 3
(R) (L)
Ch. 3 & 4 Filter
Frequency
Selector
(pg. 8)
Ch. 3 & 4
Clipping
Indicator
(pg. 8)
CH. 4
(R)