JL Audio MHD900/5-24V User manual

OWNER’S MANUAL
5-ChannelClass-D Marine System Amplifier
Thank you for purchasing a JL Audio amplifierfor
your marine sound system.
Your amplifier hasbeen designed and manufactured to exacting
standardsin order to ensure years ofmusicalenjoymentin your vessel.
For maximum performance,we highly recommend thatyou 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 thisproduct.Should you
decide to installthe amplifier yourself,please take the time
to read this manualthoroughly so asto familiarize yourself
with its installation requirementsand setup procedures.
Ifyou have any questionsregarding the instructionsin this
manualor any aspectofyour amplifier’soperation,please contactyour
authorized JL Audio dealer forassistance.Ifyou need further assistance,
please callthe JL Audio TechnicalSupportDepartment
at(954)443-1100 during businesshours.
NOT FOR USE IN 12 V SYSTEMS!

2 | JL Audio -MHD900/5-24V Owner’sManual
PROTECT YOUR HEARING!
We value you asa long-term customer.For
thatreason,we urge you to practice restraintin
the operation ofthisproductso as notto damage
yourhearing and thatofothersin yourvessel.
Studieshave shown thatcontinuousexposure to
high sound pressure levels can lead to permanent
(irreparable)hearing loss.Thisand allother
high-power amplifiersare capable ofproducing
such high sound pressure levels when connected
to a speaker system.Please limityour continuous
exposure to high volume levels.
While driving,operate your audio system in
a manner thatstillallows you to hear necessary
noises to operate your vesselsafely (horns,
sirens,etc.).
SERIAL NUMBER
In the eventthatyour amplifier requires
service oriseverstolen,you willneed to have
a record ofthe product’sserialnumber.Please
take the time to enterthatnumberin the space
provided below.The serialnumbercan be found
on the bottom panelofthe amplifier and on the
amplifierpackaging.
SerialNumber:
INSTALLATION APPLICATIONS
This amplifierisdesigned foroperation in
vesselswith 24 volt,negative-ground electrical
systems.Use ofthisproductin vessels with
positive ground and/orvoltagesotherthan 24 V
may resultin damage to the productand willvoid
the warranty.
This productis notcertified or approved for
use in aircraft.
Do notattemptto “bridge” the outputsofthis
amplifierwith the outputsofa second amplifier,
including an identicalone.
PLANNING YOUR INSTALLATION
Itis importantthatyou take the time to read
thismanualand thatyou plan outyour
installation carefully.The following are some
considerations thatyou musttake into account
when planning yourinstallation.
FilterFrequency
Selector
(pg.11)
Infrasonic Filter
Selector
(pg.11)
FilterFr
eq
S
elec
(pg
.1
InputSensitivity
Control
(pg.10)
FilterSlope
Selection
(pg.11)
InputSensitivity
Control
(pg.10)
PowerStatus
Indicator
(pg.15)
Left& Right
InputJacks:
Subwoofer
(pg.9)
Left& Right
InputJacks:
FrontChannels
(pg.9) Jack for
Remote Level
ControlKnob
(pg.13)
Left& Right
InputJacks:
RearChannels
(pg.9)
ChassisGround
Connector
(pgs.6-7)
Remote Turn-On
Connector
(pgs.6-7)
+24 V Power
Connector
(pgs.6-7)