Owner's Manual
4
Enclos
ur
es
Carton
Contents
•
(1)
Marine
Grade
Subwoofer
•
(1}
Socket
head
driver
bit
•
(1)
Decorative
Trim
Ring
•
Installation
and
Operation
Manual
•
(8)
Socket
Head
Stainless
Screws
Recommended
Enclosures
This
manual
outlines
two
specific
types
of
enclosures
that
provide
distinctly
dif-
ferent
performance.
This
section
is
to
help
you
dec
i
de
which
type
is
best
for
your
application.
Sealed
Enclosures
Sealed
enclosures
are
the
simplest
to
build.
The
most
important
part
of
building
a
sealed
e
nclosure
is
to
make
sure
that
the
enclosure
is
airtight.
Using
glue
and
some
type
of
sea
lant
on
all
seams
will
ensure
solid
construction
and
prev
en
t
air
leaks.
The
box
volume
will
directly
impact
the
performance
of
the
speaker
Larger
enclosures
will
provide
flatter
response
and
deeper
bass
where
smaller
boxes
will
provide
a
bump
in
the
response
curve
and
generally
higher
output
for
greate
r
SPL
Advantages
of
sealed
enclosures:
•
Small
enclosures
•
Lin
ear
(Flat)
response
•
No
port
noise
•
High
power
handling
at
all
frequencies
•
Excellent
for
sound
quality
•
Extended
low
frequency
output
when
compared
to
vented
enclosures
Vented
Enclosures
Vented
enclosures
vary
only
from
the
sea
led
enclosure
in
that
a
vent
or
por
t is
added
to
"tune"
the
enclosure.
The
enclosures
recommended
are
designed
for
great
overall
performance.
Larger
boxes
tend
to
be
easy
to
tun
e
to
lower
frequen
-
cies
while
medium
and
small
boxes
are
easier
to
tune
to
higher
frequencies
.
The
vented
design
is
less
linear
in
response
than
the
sea
led
box
but
with
noticeably
more
output
at
the
tuning
frequency
Advantages
of
vented
enclosures:
•
High
er
ave
rage
output
than
sea
led
•
Tuning
frequency
can
be
easily
adjusted
by
changing
port
l
ength
•
Deep
bass
response
with
lower
power
r
equ
ir
em
en
ts
•
Great
for
high
output
with
limited
power
Infinite
Baffle
Design
Th
ese
designs
typically
called
"IB",
are
the
eas
i
est
enc
lo
sure
types
to
build
.
Th
e
reason
is
that
you
are
not
actually
building
an
enclosure,
but
r
ather
s
imul
ating
one
.
This
is
done
by
closing
off
a
cavity
area
(ie;
car
trunk
,
enclosed
ar
ea
of
a
boat
hull)
with
a
baffle
board.
This
creates
your
"
IB"
sub-woofer
system.
Essentially,
an
"IB"
de
s
ign
can
ju
st
be
considered
a
large
sea
led
e
nclo
su
re
design.
Given
that
an
"IB"
design
does
not
rely
on
a
volume
of
air
for
its
suspension,
the
low
frequenc
y
output
is
driven
by
the
speaker's
inherent
damping
or
"Ole".
Advantages
of
infinite
baffle
design:
•
Ea
sy
to
build
•
Light-weight
•
Deep
bass
r
es
ponse
with
low
er
power
requirements
Vented
vs
Sealed
vs
Infinite
Baffle
The
graph
shown
here is a
samp
le
of
how
SPL
and
Excursion
differ
s
betw
een
the
various
enclosures.
- Vented Box
SP
l
•-•-
Infinite Baffle
SP
L -
-•
Se
aled Box
SPL
- Ve
nt
ed Box E
xcursion
--
~
-
Infinite
Ba
ffle
E
~(;
ur
s
ion
--
- Sealed Box Excursi
OJ'l
IMP(
ohms)
S:(:B ... )
---
"
,....
""
'-
JBo
-•
,
.._
.;,....-
"~
.....,........,....
-
..,.
-
·-
-
r-l
nlin
,....i
te
B
,....
"
,....
le
1
m.;.,
"
"'
-
"
-
~
-......--
- -S-,.eal
ed
_
Bo
_• '
""
,....
"'-
'"
,..-
"
...,...-,..-E>eT"""u",...,
ion
(mm)
/'
.-
/
.:;;~
100
.
0I----
-t--
-
-+-b-::~!+-+
-t-t-+-t--
--
t---t
-
t--t-+
-t-
t-H
•
.-·~~~;,
j I
Frequency,
Hz
Building
an
Enclosure
To
work
pr
o
perly,
the
walls
of
the
enc
lo
sure
must
be
rigid
and
not
flex
when
sub-
jected
to
the
high
pressures
gen
er
ated
by
the
speaker'
s
ope
r
at
io
n.
For
optimum
performance,
we
recommend
using
3/4"
MDF
(Medium
Dens
it
y
Fiberboard)
and
internal
bracing.
The
enclosure
sho
uld
be
glued
together
and
secured
with
nails
or
screws.
Calculating
Volume
Calculating
volume
is
merely
a
matte
r
of
measuring
the
di
me
ns
io
ns
in
inches
a
nd
using
the
form
ula:
H x W x D
divid
ed
by
1728
(cubic
feet
).
See
bl
ock
below.
Box
Volume
Divided
by
(cubic
feet)
Height"
X
Width"
x
Depth"
1728
If
two
facing
sides
are
of
uneven
length,
add
them
togethe
r
and
divide
by
two
to
take
the
average.
Using
this
numbe
r
wi
ll
give
you
the
volu
me
wi
th
out
the
necessit
y
of
calcula
ting
the
box
in
sections
and
a
dding
the
sections
to
gether
The
thickness
of
the
baffle
material
reduces
the
internal
volume
so
this
must
be
subtracted
from
the
outside
dimensions
to
determ
i
ne
t
he
internal
volume.
Th
e
speaker
itself
al
so
reduces
the
in
tern
al
volume
.
The
amount
of
air
displaced
by
each
mod
el
is
list
ed
on
the
specification
sh
eet
and
should
also
be
s
ubtract
ed
fr
om
the
gross
volum
e
calculation.
Sealed
Enclosure
NOTE:
Vb
is
the
internal
volume,
before
any
speaker
and/or
port
dis-
placement.
All
external
dimensions
were
based
on
the
use
of
3/4
"
(1.90cm)
materials.
NOTE:
When
using
enclos
ures
other
th
an
recommended
,
ca
ll
T
echnica
l S
uppor
t
fo
r
correct
app
lication.
Optimum
Sealed
Enclosure
Recommendation
Sealed
Enclosures
10"
-
Vb
-Internal
Area
cu
.
ft.
(Lit
er)
1--
- .
0.
75
(21.24)
Woofer
Displacement
cu.
tt.
(Lit
er)
0.15
(4
.
35)
Total
Internal
Volume
cu.
ft.
(Liter)
0
.90
(25.59)
F
3
-
3dB
Point
(Hz)
60
.6
Ole-
En
c
lo
s
ure
Damping
077
H-
Height
-
inch
(em)
14.5
(36
.
83)
W-
Widt
h -
inch
(em)
18.5
(47.00)
D-
Depth
-
inch
(em)
8.5
(21.59)
Recommended
Sealed
Enclosure
Volume
Range
Sealed
Enclosures
Vb-
Volum
e
range
cu.
ft.
(Liter)
10"
0.5
to
0.85
(1416
to
24
07)
12"
1.0
(28.33)
0.
25
(7.30)
1.25
(35.63)
53.7
···-·-
-··---
0.82
15
.5
(39.37)
16.25
(41.28)
12.0
(30.48)
12"
0.70
to
1.80
(19.82
to
50.97)