OWNER'S
M121B6
MANUAL
We
professionals
your
Thank
you
With
will
strongly
recommend
by
your authorized
employed
properly
own
installation,
completely
Marine
for
choosing a JL
proper
deliver
by
your
install
Subwoofer
Audio
installation, your
years
of
listening
that
you
have
JL
Audio
dealer. The
dealer
have
the
this
product.
please
before
If
read
beginning the
Marine
Subwoofer.
new
speaker
pleasure.
your
subwoofer
installation
necessary
you
prefer
this
tools
to
instruction manual
process
installed
and
perform
.
experience
to
.A
'-'L
/1
e a
AUDIO
d..
l'rk-
t:'/1
e C
®
lA
'\V
e -
PHYSICAL
SPECIFICATIONS
INCLUDED
·One
Polymer Subwoofer
·Six
#10
x 1 5/8-inch
stainl
ess
-ste
·Six
#1
0 sta
inless-steel
·L
ogo Badg
On
e Pair
One
Pair
On
e Pa
One Pair
.
,..
-"
PARTS
Grille
(41
mm) pan-head
el
screws
washer
s
es (Sp
ort-Grille Mode
Bla
ck (White & Titanium/Black Model
Red
(White & T
ir
White (White Models Onl
ita
nium/ Bla
ls Only)
ck
y)
Models)
Titanium (Titanium/Black Models Onl
s)
y)
Power Handling (continuous):
* Xmax specifications are derived via
**Efficiency (1W/1
as
a comparison
We rec
omm
We do not reco
end the u
mmend the u
m}
is
!l2! an accurate indicator
to
other
subwoofers
se
of this speaker in a bi
se
of this
affect performance.
one-way
to
subw
voice coil overhang
of
a subwoofer's
determine
-amplified
oofer with a
600
W
method
with
no correction factors applied.
capability
" !
and
should
not
be used
which one
output
is
"louder
system using high-quality satellite speakers and amplifiers.
passive cross
over (coil
),
as
this ty
pe
of
devic
e will
adversely
INSTALLATION
The diagram above s
tallat
ion procedure into a fibergl
ins
th
e supp lied hardware (Classic Grille Model shown.
Installation
ys
foll
Alwa
wo
rking on a vessel. Use eye-protection at all tim
and a dust
1) Choo
se
PROCEDURE
how
s the typical
ass panel using
is
the
same
for Sport Grille
ow pro
per safety procedures when
mas
k and glov
es
when
cutt
a flat mounting surface that h
Models).
ing.
as
sufficient depth and air space behind it to acce
su
bwoofe
the
2)
Cut a 12
3) Run t
4)
Pl
ace
hole lo
5) Remove the woo
(s
ee chart on next page) in each
loca
r.
0625-in
ch (306
he
spea
ker cable to the mounting l
the woofer
ca
in
the hole and
tions using a shar
fer and drill
ti
ons
. It is al
so advisable to
mm)
diameter hole.
mark
p, pointed too
a pilot
of
use
oca
the s
cre
l.
hole
the
scre
w
a hand-driv
tio
countersink tool on each hole to further inhibit
gel-coat cr
6) Conn
with
Grille model
ba
7) While holding the sp
ardwa
h
fa
sten
acking
of fib
erglass
ec
t the speaker wir
its
grille in pl
s,
pay atten
dge wi
ll added.
loca
tion, evenly sn
cri
ss
-cross pattern, then hand tighten
ss
pattern.
cro
Non-stan
da
rd installations m
re. Always use mari
ers
to ensure a
es
and
ace,
into the opening (for Sport
tion
to
ea
ker firmly in its mounting
ug the
mounting screws in a
ne-grade,
secure. reli
panel
s.
place
the woofe
where the logo
in
a criss
ay
req
uire different
stainless-st
able installation.
es
pt
n.
w
en
r,
-
eel
A
ll
s
2
pecification
s
are
subj ec t t o chan
ge witho
ut noti ce .
J L AUD IO
M121B6
#1 0 SCREW:
PILOT HOLE RECOMMENDATIONS
While this speaker
resi
stant,
spray
or
to
withstand high-pressure water spray.
Please
exercise care when washing your
avoid damaging
submersibles, personal watercraft
vessel
likely
ed
Prolong
excess
of 1 OOdB
This high-performance speaker
level.
Please
order
to
preserve your ability
When
ins
talling a subwoofer in your v
extremely
not
only
to
it
is
mounted to.
can
become a dangerous projectile in a collision.
Please
review the mounting information carefully
use th
and
mount this product.
is
designed
it
is
not
your
to
be under water at any
exposure
to
can cause permanent hearing loss.
exercise restraint
important
to
the woofer itself,
If
not
e supplied marine-g
to
be water and
designed
to
be submerged
speaker. Do not install
or
time
sound p
ress
can
in
its operation
to
enjoy its fidelity.
sec
ure
it
firmly. This applies
but
also the structure
firmly attached, the speaker
rad
e hardware to
ure levels in
exceed this
any
.
esse
boat
other
l,
to
on
Only)
ll
read
Badges
BADGE
for
Spo
rt Grille
in
the mann
each col
correctly wher
3:0
0 or
9:00
rille
choi
er
or is
that b
sure
ever
allows
ce
of
ze
est
9:00
3:00 Position
Position
INTERCHANGEABLE LOGO
(Sport-Grille
Models
Interchangeable Logo
model subwoofers
your
instal
for the JL
included
in
it
is
col
suits yo
ur inst
NOTE:
A left
incl
uded. These two different orientations en
the "
JL
Audio"
are included to further customi
lation. The design of the Sport G
Audi
o logo to be added in your
ors and oriented
allation.
and
a right badge of
Logo wi
positioned (most commo nly the
position).
Remove the adh
and affix t
pos
itioning hole
es
ive backing from the badge
he
badge to the grille using the small
as
a guide. See di
agram
~
at right.
ENCLOSURE SPECIFICATIONS
~\
SnlodDo<lg•
t 0
1~1
610
mm x 470
mm x 400
mm
Iii
141.6
1itr
es
762
mm
x 470 mm x 521 mm 127 mm x
The enclosure recommendations listed are external dimensions which assume the u
(6.5mm) from
All enclosure volumes listed
volum
~L
AU
ea
ch
dim
ension. Do not u
e.
All enclosure dimensions listed have already taken this
D IO
M121BB
are net in
se
any material wi
te
rnal volumes!
th a th
ickn
ess
Box
volume displacement, port displacement and b
int
o account.
All spec
ificat
ions a re su
of l
se
ess tha
of
n 5/8" (16m
bj
e ct to c h ange w itho
343
mm
3/4" (19mm) thick materia
m)
as this
may comprom i
rac
e displaceme
ut not i ce
l.
If
you are using 5/8" (16mm) thick material, subtract 1 /4"
se
the rigi
dity
of
the enclosure.
nt
must be added to obtain th e final gr
oss
int
ernal
3
RECOMMENDED CONTINUOUS (RMS) POWER RANGE FOR ONE SUBWOOFER DRIVER:
75W
LEGEND·
M121BB
,;;
0@~'bk~
125W
••m-
MINIMUM
MEDIUM
GRAY
From a reliability standpoint, this zone
represents a very comfortable operating power
range for
stress
performance potential, either.
Use
will
not damage the woofer, but may result
unsatisfactory performance.
When designing
chart represent continuous
impedance
JL
workmanship for a period
Damage caused
misuse, abuse,
instruction
warranty does n
the
or
norm
This
purchaser
voided
Should service be nec
manufacturing defect
re
pl
ace
(MINIMUM):
each
driver.
This
the woofer but
of
less
and
AUDIO warr
s,
cos
t of removi
al
wear and tear
warranty
of
if
the
level of power will not
will
not
extract
all
than the minimum power level
with
our
systems
the
total
drivers,
(RMS)
amplifier power
number
of
subwoofers into your calculations. Adhering
ants this speaker
of
two
by
the following
product
mod
ifi
una
uthorized repair attemp
ot
cover incidental
ng
or rein
is
the
product from an authorized
cation or neglect, failure
sta
lling the unit(s). Cosmetic damage
is
not
covered under warranty.
not
transferable
factory-applied product serial number
essary
or
malfuncti
the defective product with new or remanufactured product at
LIGHT
GRAY
This zone represents the best compromise
between long-term reliability, high-output and
low-distortion performance.
of
its
lower than the woofer's continuous power rating
(as
publish
ed
be
taking
performance
important
per
woofer
be
free
advantage
to
and
the
in
it
is very
to
(2)
years from
is not covered under warranty: accident,
ts.
misrepresentations by
or
consequential damag
and
applies
JL
under this warranty for any reason due
on,
JL AUD
IO will, at its discretion, repair or
llmEJI'fi
OPTIMUM
(OPTIMUM):
in
its
specifications)
of the woofer'
range
without undue
achieve a good
assume
that
the
JL
ml
0
This
power
, but you
s,
low-distortion
risk
of
failure.
power
match between
user will regularly
to
these power recommendations will result
AUDIO
LIMITED WARRANTY (USA)
Marine Subwoofer Components
of
def
ects in materials and
original date
to
foll
of
purchase.
ow
installation
the seller.
es
and does n
only
to
due
the
ot
to
accident
original
AUDIO dealer. Warranty
is
removed
or
defaced.
no cha
250W
i'i\iii
ml
ii\~ii
iiii
iiiiiii
iiiiiit'ffi
gjilJj
.
MAXIMUM
:i
ffii
tli~·i~i~~~~~····~·············
DARK
GRAY
(MAXIMUM):
S
lightly
more SPL w
power into
this
level
will
still
This
cover
is
to
rge.
is
2d8,
driver
range,
the
subwoofer amplifier
make
full use
the express warranty
purchase at
product
therefore
legal rights, and you may also h
If
authorized JL A
(a
authorized
a va
without
Cove
defective components. Non-defecti
collect C
product
Al
zone
compared
to
is
desig
ned
but not
beyond
of
that
Any appli
retail, and no warranties, whether
th
erea
th
ese
you
need
A
ll
warranty returns should be sent
copy
of
the original sal
dealers
li
d retu
rn
pr
oof
rag
e m
ay
us
tomer
to
ways incl
JL
ude pr
so
ow
:m
____
WARRANTY
ill
be
gained
, but
typically
the
light
gray
to
power wi
cab
zone.
operate
safely
. Operate with caution.
up
and
the
subwoofer driver's capabilities. The
thout
drastically overdriyj
in
systems
le implied warranti
as
provi
fter. Some
exclusions may
service on
UDIO
your
dealer a
will be refu
VOID
by
pushing the
not more
than
The
subwoofe
r
to
this
power
that
are
both reliable
es
are
ded
herein beginning with the date
states
do not all
not
apply to you. This warranty giv
ave
other rights which
JL
AUDIO product:
to
nd
must be
es
receipt) Direct
sed
unle
ss
I
OOO
__
BLACK
We
do
level
this
probability
high
excessive
Subwoofer drivers operated
power
are NOT covered
na
the
amplifier(s).
and
enjoyable.
limited in duration
express
ow
limitations on impli
JL
AUD
acc
ompanied by proof
W
(WARRANTY
not recommend op
of
heat and/or mechanical
VOID)
power.
In this
zone, there
tha
t the driver will
under
power
levels listed
Make
sure you factor system
to
or impl
ied, shall
vary fr
om state to state.
IO
freig ht prepaid through an
returns from consume
specifically authorized by
:
era
ting woofers at
is
fail
stress.
at
these levels
warranty.
in
the
the period
of
the orig inal
apply to this
ed warranties,
es
you specific
of
purchase
rs
or non-
JL
AUDIO
due to
authorization number. Warranty expiration on products returned
of purc
hase will be determined from the manufacturing date code.
be invalidated
is
AUDIO
oof
as this
date is previous to
ve
items
rec
responsible for shipping charg
Fre
ight damage on returns
of
purchase (sal
es
receip
t).
purchase
date. Return only
eived will be returned freight-
es
and
ins
uran
ce
is
not covered under warra
in sending the
a very
above
with
nty
of
of
.
JL Audio customer service: (954) 443
For Service Information in
10
369 North Commerce
-1
JL
the
U.S.A. please call:
100 during normal business hours (Eastern Time)
Audio, Inc
Parkway, Mirama
r, FL
3302
5
International Warranties:
Products purchase
Pri
nt
ed
in U.S
.A
d outside the United States of America are covered only by that countr
y's
distribut
or and not by
JL
Audio, Inc
JLM121
86_SKU#0110
74
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