Owner's Manual

4
Enclosures
Carton
Contents
•
T1
Subwoofer
with
Trim
Ring
•
(12)
Mounting
Screws
•
(4)
Trim
Ring
Screws
•
(1)
Socket
head
driver
bit
•
Installation
and
Operation
Manual
Recommended
Enclosures
This
manual
outlines
two
specific
types
of
enclosures
that
provide
distinctly
dif-
ferent
performance.
This
section
is
to
help
you
decide
which
type
is
best
for
your
application.
Sealed
Enclosures
Sealed
enclosures
are
the
simplest
to
build.
The
most
important
part
of
bui
l
ding
a
sealed
enclosure
is
to
make
sure
that
the
enclosure
is
airtight.
Using
glue
and
some
type
of
sealant
on
all
seams
will
ensure
solid
construction
and
prevent
air
leaks
.
The
box
volume
will
directly
impact
the
performance
of
the
speaker.
Larger
enclosures
will
provide
flatter
response
and
deeper
bass
where
s
maller
boxes
will
provide
a
bump
in
the
response
curve
and
generally
higher
output
for
greater
SPL.
Advantages
of
sealed
enclosures:
•
Small
enclosures
•
Linear
(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
sealed
enclosure
in
that
a
vent
or
port
is
added
to
"tune"
the
enclosure.
The
enclosures
recommended
are
designed
for
great
overall
performance
.
Larger
boxes
tend
to
be
easy
to
tune
to
lower
frequen-
cies
while
medium
and
small
boxes
are
easier
to
tune
to
higher
frequencies.
The
vented
design
is
le
ss
linear
in
re
s
ponse
than
the
sealed
box
but
with
noticeably
more
output
at
the
tuning
frequency.
Advantages
of
vented
enclosures:
•
Higher
average
output
than
sealed
•
Tuning
frequency
can
be
easily
adjusted
by
changing
port
length
•
Deep
bass
respon
se
with
lower
power
requirements
•
Great
for
high
output
with
limited
power
Vented
vs
Sealed
The
graph
shown
here
is
a
sample
of
how
the
F3
drop-off
point
differs
between
sealed
and
vented
enclo
s
ures
.
120.0
--
t--+
- -
-
1--
.
t---
·-
1--
110.0
~=:
··
100
.0
90
.0
t--
-
..
-
~
-
- t-
1--
t--
t-
·
80.
0
1--
1--
70.0
- .. -
t--
60.0
10.0
20
.0
400
60.0 80.0 100.0
·-·
Sea
led
Box
-
Vented
Box
Frequency,
Hz
- -
!-
-·
··-
- -
1--
+--
-
+- ·-
+--
. .
--
1--
·
-
1
-
~
-=-1--
·--
1--
·
··-
1-
-
1-
f-
200
.0
Building
an
Enclosure
To
work
properly,
the
walls
of
the
enc
l
osure
must
be
rigid
and
not
flex
when
sub-
jected
to
the
high
pressures
generate
d
by
the
speaker's
operation.
For
optimum
performance
,
we
recommend
using
3/4"
MDF
(Medium
De
ns
i
ty
Fiberboard)
and
internal
brac
i
ng.
The
enclosure
should
be
glued
together
and
secured
with
na
i
ls
or
screws.
Calculating
Volume
Calculating
volume
is
merely
a
matte
r
of
measuring
the
dimens
i
ons
in
inches
and
using
the
fo
r
mula:
H x W x D
divided
by
1728
(cubic
feet)
.
See
block
below.
Box
Volume
Divided
by
(cubic
feet)
Height"
x
Width"
x
Depth"
1728
If
two
facing
sides
are
of
uneven
leng
th,
add
them
together
and
divide
by
two
to
take
the
ave
r
age.
Using
this
numbe
r
wi
ll
give
you
the
volume
without
the
necessity
of
calculating
the
box
in
sections
and
adding
the
sections
together.
The
thickness
of
the
baffle
material
reduces
the
internal
volume
so
this
mus
t
be
subtracted
from
the
outside
dimensions
to
determi
ne
the
internal
volume
.
The
speaker
itself
also
reduces
the
internal
volume
.
The
amount
of
air
displaced
by
each
model
is
listed
on
the
specif
i
cation
sheet
and
should
also
be
subtracted
fro
m
th
e
gross
volume
calculation.
Sealed
Enclosure
NOTE:
Vb
is
the
internal
volume,
before
any
speaker
and/or
port
dis-
placement
is
added.
All
external
dimensions
were
based
on
the
use
of
3/4"
(1.90cm)
materials.
NOTE:
When
using
enclosures
othe
r
than
recommended,
call
Technical
Support
for
correct
application.
Optimum
Sealed
Enclosure
Recommendation
Sealed
Enclosures
10"
Total
Internal
Volume
cu.
ft
.
(Liter)
0.80
(22.62)
Woofer
D
is
placement
cu.
ft.
(Liter
)
0.03
(0.8
2)
Vb
-
Int
e
rn
al
Area
cu.
fl.
(Liter)
0.77
(
218)
F
3
-
3d
B
Po
in
t
(Hz)
40
.3
Ole
-
Enclosure
Damping
1.10
H-
Height
-
inch
(em)
12
(30.48)
W-
Width
-
inch
(em)
18
(45.72)
D-
Depth
- i
nc
h
(em)
95(24
.1
3)
Recommended
Sealed
Enclosure
Volume
Range
Sealed
Enclosures
Vb-
Volume
range
cu.
ft.
(Liter)
10"
0.5
to
1.0
(14.16
to
28.32)
12"
1.10
(30.87)
0.05
(1.42)
1.
05
(
29.45
)
39
.9
1.
18
1
3.
0
(33
.
02)
22.0
(55
88)
9 5
(24.13)
12"
0.75
to
1.25
(21.24
to
35.40)