JBL STADIUM 1024 User manual

Subwoofer Owner•s Manual
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THANK
YOU
for
choosing
a
JBL
Stadium
subwoofer.
These
subwoofers
are
designed
to
suit
a
broad
range
of
car
audio
applications
and
can
be
used
in
a
wide
variety
of
enclosure
types
to
produce
extended,
powerful
bass
in
a
limited
amount
of
vehicle
space.
To
get
the
most
performance
from
your
new
subwoofer,
it
is
strongly
recommended
that
you
have
a
qualified
professional
install
your
subwoofer.
Although
this
manual
does
provide
general
instructions
about
installing
these
Series
subwoofers,
it
does
not
include
enclosure
construction
details
or
exact
installation
methods
for
any
particular
vehicle.
If
you
do
not
feel
that
you
have
the
necessary
experience,
do
not
attempt
the
installation
yourself,
but
instead
ask
your
authorized
JBL
dealer
about
professional
installation
options.
Remember
to
keep
your
sales
receipt
in
a
safe
place,
along
with
this
manual,
so
that
both
are
available
for
future
reference.
WARNING
Playing
loud
music
in
a
vehicle
can
h_inder
your
ability
to
hear
traffic
and
permanently
damage
your
hearing.
The
maximum
volume
levels
achievable
by
JBL
speakers
when
combined
with
high-power
amplification
may
exceed
safe
levels
for
extended
listening.
Using
low
volume
levels
is
recommended
when
driving.
JBL,
Inc.
accepts
no
liability
for
hearing
loss,
bodily
injury,
or
property
damage
as
a
result
of
use
or
misuse
of
this
product.
REPRODUCING
BASS
IN
VEHICLES
Depending
on
the
size
of
your
vehicle's
interior
listening
space,
reproduced
bass
frequencies
below
80Hz
will
be
boosted
by
nearly
12dB
per
octave
as
frequency
decreases.
This
phenomenon,
known
as
the
vehicle's
transfer
function
(or
cabin
gain),
plays
an
important
role
In
shaping
the
subwoofer's
frequency
response
In
your
vehicle.
SUBWOOFER
ENCLOSURE
TYPES
The
subwoofers
are
designed
to
perform
best
in
moderately
sized
sealed
enclosures,
vented
enclosures
and
prefabricated
band-pass
enclosures.
Infinite-baffle
mounting
is
possible,
but
the
subwoofer's
mechanical
power
handling
will
be
reduced
because
there
will
be
no
volume
of
air
to
stiffen
the
subwoofer's
suspension
and
prevent
overexcursion.
If
you
choose
infinite-baf-
fle
mounting,
consider
the
RMS
and
peak
power-handling
ratings
to
be
half
of
what
is
listed
in
the
specifications
in
this
manual
.
You
should
choose
an
enclosure
type
based
on
the
amount
of
cargo
space
you
can
devote
to
the
enclosure,
the
amount
of
power
you
will
use
to
drive
your
subwoofer(s),
and
your
listening
habits
.
SEALED
ENCLOSURES
The
air
trapped
inside
a
sealed
enclosure
is
compressed
when
the
subwoofer
moves
rearward
and
is
rarefied
when
the
subwoofer
moves
forward.
In
both
cases,
the
air
inside
and
outside
the
box
will
seek
equilibrium
by
pushing
and
pulling
on
the
subwoofer
cone.
The
result
is
a
stiffer
suspension
when
compared
to
the
subwoofer
operating
in
free
air.
This
means
that
the
subwoofer's
cone
will
be
harder
to
move
at
low
frequencies,
a
condition
which
protects
the
subwoofer
from
physical
overexcursion,
but
requires
more
power
than
other
designs
to
achieve
a
given
acoustic
output.
SEALED-ENCLOSURE
PERFORMANCE
ADVANTAGES
·The
in-vehicle
performance
will
have
the
flattest
overall
frequency
response.
•
The
in-vehicle
response
will
have
the
widest
bandwidth.
(Usable
low-frequency
response
inside
the
vehicle
will
be
below
20Hz.)
•
An
optimum
sealed
enclosure
will
always
be
smaller
than
an
optimum
enclosure
of
another
type.
SEALED-ENCLOSURE
PERFORMANCE
TRADE·DFFS
·An
optimum
sealed
enclosure
will
have
lower
overall
efficiency
than
an
optimum
enclosure
of
another
type.
•A
subwoofer
in
an
optimum
sealed
enclosure
will
require
more
amplifier
power
to
achieve
a
given
acoustic
output
than
in
an
optimum
enclosure
of
another
type.
SEALED-ENCLOSURE
CONSTRUCTION
Sealed-enclosure
construction
is
straight-
forward
and
forgiving
of
errors
in
volume
calculation,
but
air
leaks
should
be
avoided.
Use
medium-density
fiberboard
(MDF),
glue
and
screws
to
construct
the
enclosure,
and
seal
all
joints
with
silicone
caulk.
RECOMMENDATION
Subwoofers
in
sealed
enclosures
are
recommended
for
enthusiasts
who
prefer
accurate
music
reproduction
and
flat
frequency
response,
for
those
who
have
a
smaller
space
to
devote
to
a
subwoofer
enclosure,
and
for
those
who
have
plenty
of
amplifier
power
devoted
to
driving
the
subwoofer.
The
sealed-enclosure
design
indicated
in
this
manual
represents
the
best
compromise
between
low-frequency
extension
and
flat
response.
VENTED
ENCLOSURES
A
vented
enclosure
acts
like
a
sealed
enclosure
at
frequencies
above
its
tuned
(resonance)
frequency.
At
resonance
(which
is
defined
by
the
vent),
the
vent
produces
the
majority
of
sound-
the
subwoofer
cone
is
nearly
stationary
while
the
air
inside
the
vent
vibrates.
This
provides
greater
mechanical
power
handling
at
and
above
resonance,
but
reduced
mechanical
power
handling
below
resonance.
Since
the
subwoofer
cone
and
voice
coil
don't
move
much
at
resonance,
airflow
across
the
voice
coil
is
minimized
and
thermal
power
handling
is
reduced
slightly
at
resonance.
Vented
enclosures
provide
better
efficiency
in
the
40Hz
-
60Hz
range,
at
the
expense
of
sound
output
in
the
lowest
octave
(below
40Hz).
The
use
of
an
infrasonic
filter
is
recommended
with
vented
enclosures.
An
optimum
vented
enclosure
for
a
Series
subwoofer
is
larger
than
an
optimum
sealed
enclosure.
VENTED-ENCLOSURE
PERFORMANCE
ADVANTAGES
•
An
optimum
vented
enclosure
has
greater
efficiency
and
higher
output
in
the
40Hz-
60Hz
range
than
an
optimum
sealed
enclosure.
•
An
optimum
vented
enclosure
provides
a
greater
sensation
of
bass
than
an
optimum
sealed
enclosure.
• A
subwoofer
in
an
optimum
vented
enclosure
will
require
less
amplifier
power
to
achieve
a
given
acoustic
output
(down
to
the
enclosure's
resonance
frequency)
than
in
an
optimum
sealed
enclosure.
VENTED-ENCLOSURE
PERFORMANCE
TRAOE-OFFS
•
Reduced
output
in
the
lowest
octave
(below
40Hz).
•
Reduced
mechanical
power
handling
below
the
enclosure's
resonance
frequency.
The
use
of
an
electronic
infrasonic
filter
is
strongly
recommend-
ed
to
reduce
the
chance
of
overdriving
the
subwoofer
below
the
enclosure's
resonance
frequency.
•
An
optimum
vented
enclosure
will
always
be
larger
than
an
optimum
sealed
enclosure.
VENTED·
ENCLOSURE
CONSTRUCTION
Vented-enclosure
construction
is
more
difficult
than
the
construction
of
a
sealed
enclosure.
The
enclosure
volume
and
port
dimensions
have
a
specific
relationship
with
the
physical
and
electromechanical
characteristics
of
the
subwoofer,
requiring
that
the
recommended
enclosure
volume
and
port
characteris-
tics
be
strictly
observed.
As
with
sealed
enclosures,
use
medium-density
fiberboard
(MDF),
glue
and
screws
to
construct
the
enclosure,
and
seal
all
joints
with
silicone
caulk.
RECOMMENDATION
Subwoofers
in
vented
enclosures
are
recommended
for
enthusiasts
who
prefer
accentuated
bass
response,
for
those
who
have
plenty
of
cargo
space
to
devote
to
a
subwoofer
enclosure
and
for
those
who
will
use
a
less
powerful
amplifier
to
drive
their
subwoofer.
The
volume
and
port
dimensions
indicated
must
be
followed
precisely
to
ensure
optimum
performance.
MOUNTING
THE
SUBWOOFER
The
subwoofers
should
be
mounted
from
the
outside
of
the
enc
l
osure.
Use
the
included
foam
mounting
gasket
to
ensure
a
leak-free
seal
between
the
subwoofer
frame
and
the
enclosure.
CONNECTING
THE
SUBWOOFER
SETTING
THE
IMPEDANCE
The
Stadium
subwoofers
both
feature
the
Selectable
Smart
Impedance
~
(SSI)
switch.
This
exclusive
feature
lets
you
set
the
subwoofer's
impedance
to
either
2
ohms
or
4
ohms
with
the
flip
of
a
switch
(see
illustrations
below).
This
allows
you
to
extract
the
most
from
your
subwoofer
amplifier
In
any
situation.
The
SSI
2-ohm
setting
increases
the
subwoofer's
output
over
the
4-ohm
setting
by
up
to
3dB,
depending
on
the
amplifier.
Performance
is
identical
in
all
other
respects.
If
the
connected
amplifier
is
rated
for
2-ohm
operation
and
its
2-ohm
power
ratings
are
within
the
subwoofer's
power-handling
specifications,
setting
the
SSI
switch
in
the
2-ohm
position
will
achieve
maximum
output.
40
c
~n~~~o
20
o(?~=
2-0hm
Setting
4C
rnJIID
)
2C
o(?
~
=
-
~
4-
0hm
Setting

IMPORTANT:
Make
sure
the
subwoofer
amplifier
is
turned
OFF
before
setting
the
SSI
switch.
Oo
not
change
the
switch
position
while
the
subwoofer
amplifier
is
operating.
Doing
so
could
damage
the
amplifier.
CONNECTING
THE
AMPLIFIER
The
subwoofer
connectors
are
compatible
with
bare
or
tinned
wires.
The
recommended
wire
gauge
is
between
14AWG
and
BAWG,
depending
on
the
length
of
the
wire
run
between
the
amplifier
and
woofer.
Heavier
gauge
wire
is
preferred
for
runs
over
6'
(2m).
TECHNICAL
DATA
Stadium
1024
THIELE-SMALL
PARAMETERS
20 40
VotcE-COtL
DC
RESISTANcE:
VotcE·COIL
INDUCTANCE
@
1KHz:
DRIVER
RADIATING
AREA:
MoToR
FoRcE
FAcToR:
CoMPLIANCE
VoLUME:
SuSPENSION
CoMPLIANCE:
MOVING
MASS,
AtR
LOAD:
FREE·AtR
RESONANCE:
MECHANICAL
0:
ELECTRICAL
0:
Tom
O:
MAGNETIC-GAP
HEIGHT:
VotcE-CotL
HEtGHT:
MAXIMUM
ExcuRstoN:
REVC
(OHMS)
..•.....
1.80
....
•
..•.
4.06
LEvc
(MH)
.........
1.04
..
.
......
0.91
So
(tN
2)
..........
53.69
........
53.69
So
(cM
2)
.........
346.36
..
... ..
346.36
BL
(T.)
....
"
....
10.54
........
14.98
VAS
(FT
3
),
..
,
...
,
..
0.86
,
.......
,
0.89
VAS
(LITERS)
,,,,,,,
24.22
,,,,,,,,
25.27
CMs
(IJM/N)
..••.•
144,00
,....••
150.00
MMs
(GRAMs)
..••..
188.72.,
,,
...
185.47
Fs
(Hz)
,
....
....
,
30
.
56
....
,•••
30.18
OMS•
••
'
•••.•.....
3.11
••
...
....
2.17
0Es
...•.
...
.,•,,,
0.57
....
,
••
,.
0.61
0TS
,,,,,,,,,
...
,,
0,48,
,,,,,,,,
0.48
HAG
(iN)
.......
" ..
0.39
" " ' •" •
0.39
HAs
(MM),,,
•••.••
10.00
.•....••
10.00
Hvc
(tN)
...........
1.32
,.. .. ..
..
1.32
Hvc
(MM)
,,,,,,,,,
33.50
••
,,,•••
33.50
XMAX
(iN)
....
......
0.47
,
........
0.47
XMAX
(MM)
,
......
,
12,00
.....
,
..
12.00
SEALED-BOX
VOLUME
(INCLUDES
DRIVER
DISPLACEMENT)
(side
view
)
V
80
x=
0.50
ft
3
(14.20
liters)
VENTED-Box
VOLUME
(INCLUDES
DRIVER/PORT
DISPLACEMENTS)
r
Port
length
=
11.3"
18
=
30.0Hz
(side
vi
ew)
C"
V
80
x=
1.5
ffl
(42.5
liters)
SPECIFICATIONS
DIAMETER:
SENSITIVITY
(2.83V
@
1M):
POWER
HANDLING:
FREQUENCY
RESPONSE:
NOMINAL
IMPEDANCE:
VotcE·Co
tL
DtAMETER:
DIMENSIONS:
t
diameter
=
3"
76mm
10"
(254MM)
91dB
450Wrms
(1350W
PEAK)
30Hz
-175Hz
2
OR
4
OHMS
21/2"
(S3MM)
mounting
de
pth
moun
tin
g
h
eight
6·15/16"
(175
mm
) 3/
4"
(
18
mm)
+
.
e:t=====~:,:
__j___
-
-----'---
cutout
diameter
•lit
9·7
/
16"
(2
39mm)
outer
diameter
11"(
279
mm)
l.Use
a
2.5
mm
hex
driver
to
open
the
cohnectors
2.1nsert
the
wire
ends
into
the
connector
openings
NOTE:
If
using
untinned
bare
wire,
be
sure
that
no
stray
"+"and
"-"strands
touch
each
other.
Touching
strands
can
cause
a
short-circuit
,
which
can
damage
your
amplifier.
3.Use
the
hex
driver
to
secure
the
wires
in
the
connectors,
as
shown
in
the
illustration
to
the
left
THIELE-SMALL
PARAMETERS
VotcE-CotL
DC
RESISTANcE:
VotcE-COtL
INDUCTANCE@
1KHz:
DRIVER
RADIATING
AREA:
MoTOR
FoRCE
FAcToR:
CoMPLIANCE
VoLUME:
SusPENSION
CoMPLIANCE:
MovtNG
MAss,
AtR
LoAo:
fREE-AIR
RESONANCE:
MECHANICAL
0:
ELECTRICAL
0:
Tom
0:
MAGNETIC
-
GAP
HEIGHT:
VotcE·CotL
HEtGHT:
MAXIMUM
ExcuRstoN:
Stadium
1224
20 40
REVC
(OHMS)
.••.....
1.82
....•..••
4.07
LEVC
(MH)
.........
1.03
.........
0.94
So
(tN
2)
..........
82
.
29
....
..
..
82
.
29
So
(cM
2)
.........
530
.
93
.... ..
.
530.93
BL(T.)
.........
11.70
........
16.99
VAS
(FT
3)
..........
1.93
.........
1.86
VAS
(LITERS)
,
......
54.65
........
52.59
CMs
(IJM/N)
......
138.00
......
•
133.00
MMs
(GRAMS)
•....•
220.58
.•....•
225.64
Fs
(Hz)
....•.
...
.
28.84
.•.•.
..•
29
.
07
OMs
....•••..•.•••
4.29
••••..•••
2.56
0Es
•.•••........•
0.53
••••.....
0.58
0Ts
..•••••.
,•••••
0.47
•..••.•••
0.47
HAs(IN)
.....
"
....
0.39
..
" "
..
.
0.39
HAG
(MM)
" " •" "
10.00
" " " "
10.00
Hvc
(tN)
...........
1.32
.... ..
...
1.32
Hvc
(MM)
•••••••••
33.50
•,
••••.•
33.50
XMAX
(IN),
..
,
.....
,
0.47
........
,
0.47
XMAX
(MM)
....
,.. ,
12.00
........
12.00
SEALED-
Box
VOLUME
(INCLUDES
DRIVER
DISPLACEMENT)
(side
view)
V
aox=
0.
75
ft
3
(21.20
liters)
VENTED-BOX
VOLUME
(INCLUDES
DRIVER/PORT
DISPLACEMENTS)
(side
view
)
V
aox=
2.5
ffl
(70
.8
liters)
SPECIFICATIONS
DIAMETER:
SENSITIVITY
(2.83V@
1M):
PowER
HANDLING:
FREQUENCY
RESPONSE:
NOMINAL
IMPEDANCE:
VotcE-CotL
DtAMETER:
DIMENSIONS:
t
mounting
dep
th
7"
(177m
m)
+
r
length
=
11.7"
Port
r~
f
a=
3D.DHz
diameter
=4"
102mm
12"
(305MM)
92dB
500Wrms
(1500W
PEAK)
25Hz
-175Hz
2
OR
4
OHMS
21/2"
(63MM)
11-1
/8"
(2
8
2m
m)
outer
diameter
12
·13
/1
6"
(32
4mm
)
HA
RMAN I
nt
ernational Industries, I
nc
.
8500
Ba
lboa Boulevard, Northrid
ge
,
CA
91329
USA
© 2017 HARMAN Inte
rn
ational
In
dustri
es
, Incorporated. All rights reserved.
HARMAN
JBL
is a
tr
adem
ark
of
HARMAN Inte
rn
ati
ona
l Industries, In
co
rp
orated registered in t
he
Unit
ed
S
tat
es
and/or
ot
he
r
co
untries.
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A 2010 N 2023
B 2011 0 2024
c 2012 p
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E 2014 R
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