Protect Your Hearing - JL Audio JD 400/4 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.).
+12 VDC Power
Connector
(pg. 4-5)
Input Mode
(pg. 7)
Filter Mode
(pg. 8-9)
2
Chassis Ground
Connector
(pg. 5)
Remote Turn-On
Connector
(pg. 6)
Turn-On
Mode
(pg. 6)
Input
CH 1 & CH 2
Voltage
Input Jacks
(pg. 7)
(pg. 7)
INPUT SECTION
CH. 1&2
Input Sensitivty
Control
(pg. 8)
Filter
Frequency
Control
(pg. 8-9)
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:
CH 1 & CH 2
Speaker Outputs
(pg. 10)
CH 3 & CH 4
Input Jacks
(pg. 7)
Left & Right
Output Jacks
(pg. 9)
PREOUTS
CH. 3&4 CH. 1&2 (only)
Filter Mode
(pg. 8-9)
CH 3 & CH 4
Speaker Outputs
(pg. 10)
Input Sensitivty
Control
(pg. 8)
Filter
Frequency
Control
(pg. 8-9)
JL Audio