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PROTECT YOUR HEARI NG!
We val ue you as a l ong-term customer. For
that reason, we urge you to practi ce restraint in
the operati on of thi s product so as not to damage
your hearing and that of others in your vessel .
Studi es have shown that continuous exposure to
hi gh sound pressure l evel s can l ead to permanent
(i rreparabl e) hearing l oss. Thi s and al l other
hi gh-power ampl ifi ers are capabl e of producing
such hi gh sound pressure l evel s when connected
to a speaker system. Pl ease l imi t your continuous
exposure to hi gh vol ume l evel s.
Whil e driving, operate your audi o system in
a manner that still all ows you to hear necessary
noises to operate your vessel safel y (horns,
sirens, etc. ).
SERI AL NUMBER
In the event that your ampl ifi er requi res
servi ce or i s ever stol en, you wil l need to have
a record of the product' s seri al number. Pl ease
take the time to enter that number in the space
provi ded bel ow. The seri al number can be found
on the bottom panel of the ampl ifi er and on the
ampl ifi er packaging.
Seri al Number:
2 | JL Audi o - MHD900/5-24V Owner' s Manual
I NSTALLATI ON APPLI CATI ONS
Thi s ampl i fi er i s desi gned f or operati on i n
vessel s wi th 24 vol t, negati ve-ground el ectri cal
systems. Use of thi s product i n vessel s wi th
posi ti ve ground and/ or vol tages other than 24 V
may resul t i n damage to the product and wil l voi d
the warranty.
This product is not certifi ed or approved for
use in aircraft.
Do not attempt to "bri dge" the outputs of thi s
ampl ifi er wi th the outputs of a second ampl ifi er,
incl uding an i denti cal one.
PLANNI NG YOUR I NSTALLATI ON
It i s important that you take the time to read
thi s manual and that you pl an out your
instal l ati on careful l y. The fol l owing are some
consi derati ons that you must take into account
when pl anning your instal l ati on.
I nf r asoni c Fi l ter
Sel ect or
( pg. 11)
Power Status
I nput Sensi ti vi ty
I ndi cator
Cont r ol
( pg. 15)
( pg. 10)
Chassi s Ground
Lef t & Ri ght
Connector
I nput Jacks:
( pgs. 6- 7)
Front Channel s
( pg. 9)
+24 V Power
Remote Turn- On
Connector
Connector
Rear Channel s
( pgs. 6- 7)
( pgs. 6- 7)
Fi l ter Fr equency
I nput Sensi ti vi ty
Sel ect or
Cont r ol
( pg. 11)
( pg. 10)
Fi l ter Sl ope
Fi l ter Fr eq
Sel ecti on
Sel ec
( pg. 11)
( pg. 1
Lef t & Ri ght
I nput Jacks:
Subwoof er
Lef t & Ri ght
Jack f or
( pg. 9)
I nput Jacks:
Remote Level
Contr ol Knob
( pg. 9)
( pg. 13)
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