JBL P1240 (serv.man2) Service Tips ▷ View online
SPECIFICATIONS
D
IAMETER
:
12" (304.8
MM
)
S
ENSITIVITY
(2.83 V @ 1
M
):
93 dB
P
OWER
H
ANDLING
:
325 W
RMS
F
REQUENCY
R
ESPONSE
:
18 ~ 500 H
Z
N
OMINAL
I
MPEDANCE
:
4
OHMS
V
OICE
-C
OIL
D
IAMETER
:
2.0" (50.7
MM
)
D
IMENSIONS
:
THIELE-SMALL PARAMETERS
V
OICE
C
OIL
D
C
R
ESISTANCE
:
R
EVC
(
OHMS
) . . . . . . 3.23
V
OICE
C
OIL
I
NDUCTANCE
@ 1
K
H
Z
: L
EVC
(
M
H) . . . . . . . 0.95
D
RIVER
R
ADIATING
A
REA
:
S
D
(
IN
2
) . . . . . . . . 82.46
S
D
(
CM
2
) . . . . . . 532.00
M
OTOR
F
ORCE
F
ACTOR
:
B
L
(T
M
) . . . . . . . . 12.62
C
OMPLIANCE
V
OLUME
:
V
AS
(
FT
3
) . . . . . . . . 3.04
V
AS
(
LITERS
) . . . . . 86.06
S
USPENSION
C
OMPLIANCE
:
C
MS
(µ
M
/N) . . . . 214.14
M
OVING
M
ASS
, A
IR
L
OAD
:
M
MS
(
GRAMS
). . . . 116.33
M
OVING
M
ASS
, D
IAPHRAGM
:
M
MD
(
GRAMS
) . . . 109.28
F
REE
-A
IR
R
ESONANCE
:
F
S
(H
Z
) . . . . . . . . 31.89
M
ECHANICAL
Q:
Q
MS
. . . . . . . . . . . 9.94
E
LECTRICAL
Q:
Q
ES
. . . . . . . . . . . . 0.47
T
OTAL
Q:
Q
TS
. . . . . . . . . . . . 0.45
M
AGNETIC
-G
AP
H
EIGHT
:
H
AG
(
IN
) . . . . . . . . . 0.31
H
AG
(
MM
) . . . . . . . . 7.92
V
OICE
-C
OIL
H
EIGHT
:
H
VC
(
IN
) . . . . . . . . . 1.25
H
VC
(
MM
) . . . . . . . 31.75
M
AXIMUM
E
XCURSION
:
X
MAX
(
IN
) . . . . . . . .0.47
X
MAX
(
MM
) . . . . . . 11.91
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
(INCLUDES DRIVER DISPLACEMENT)
SEALED
FREQUENCY RESPONSE @ 2.83 V
FREQUENCY RESPONSE @ 2.83 V
SEALED
EXCURSION/GROUP DELAY @ 400 W
EXCURSION/GROUP DELAY @ 400 W
Harman Consumer Group • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com
P1240 12" Woofer – Technical Data
mounting depth
5.38" (136.53 mm)
cutout diameter
11.061" (280.95 mm)
outer diameter
12.18" (309.47 mm)
V
BOX
=
1.25 ft
3
(35.40 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
P1240
(side view)
C
dB
100
95
90
85
80
75
70
65
60
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
12 dB LP @ 80 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
T mSec
10.0
7.5
5.0
2.5
0.0
-2.5
-5.0
-7.5
-10.0
20 Frequency 50 100 Hz 200 500 1k 2 k
Transducer Excursion
Group Delay
VENTED BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
(INCLUDES DRIVER/PORT DISPLACEMENTS)
VENTED
FREQUENCY RESPONSE @ 2.83 V
FREQUENCY RESPONSE @ 2.83 V
VENTED
EXCURSION/GROUP DELAY @ 400 W
EXCURSION/GROUP DELAY @ 400 W
SEALED BANDPASS BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
(INCLUDES DRIVER/PORT DISPLACEMENTS)
SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V
FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS
EXCURSION/GROUP DELAY @ 325 W
EXCURSION/GROUP DELAY @ 325 W
Harman Consumer Group • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com
P1240 12" Woofer – Technical Data
P1240
(side view)
Port
fo = 31.0 Hz
diameter = 4"
length = 11.27"
V
BOX
=
2.00 ft
3
(56.64 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
C
dB
105
100
95
90
85
80
75
70
65
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
12 dB LP @ 80 Hz
C
Xd mM
40
35
30
25
20
15
10
5
0
T mSec
40
30
20
10
0
-10
-20
-30
-40
20 Frequency 50 100 Hz 200 500 1k 2 k
Transducer Excursion
Group Delay
V
REAR
=
1.80 ft
3
(50.98 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
V
FRONT
=
0.75 ft
3
(21.24 liters)
P1240
(side view)
diam. = 4"
(2) Ports
fo= 68.0 Hz
length =
12.76"
C
dB
100
95
90
85
80
75
70
65
60
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
12 dB LP @ 80 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
T mSec
20
15
10
5
0
-5
-10
-15
-20
20 Frequency 50 100 Hz 200 500 1k 2 k
Transducer Excursion
Group Delay
Display
