SPECIFICATIONS
D
IAMETER
:
12" (304.8
MM
)
S
ENSITIVITY
(2.83 V @ 1
M
):
93 dB
P
OWER
H
ANDLING
:
250 W
RMS
(1,000 W
PEAK
)
F
REQUENCY
R
ESPONSE
:
23 ~ 450 H
Z
N
OMINAL
I
MPEDANCE
:
4
OHMS
V
OICE
-C
OIL
D
IAMETER
:
2.0" (50.8
MM
)
D
IMENSIONS
:
THIELE-SMALL PARAMETERS
V
OICE
C
OIL
D
C
R
ESISTANCE
:
R
EVC
(
OHMS
) . . . . . . 3.56
V
OICE
C
OIL
I
NDUCTANCE
@ 1
K
H
Z
: L
EVC
(
M
H) . . . . . . . 2.54
D
RIVER
R
ADIATING
A
REA
:
S
D
(
IN
2
) . . . . . . . . 82.31
S
D
(
CM
2
) . . . . . . 531.00
M
OTOR
F
ORCE
F
ACTOR
:
B
L
(T
M
) . . . . . . . . 14.78
C
OMPLIANCE
V
OLUME
:
V
AS
(
FT
3
) . . . . . . . . 3.22
V
AS
(
LITERS
) . . . . . 91.12
S
USPENSION
C
OMPLIANCE
:
C
MS
(µ
M
/N) . . . . 227.58
M
OVING
M
ASS
, A
IR
L
OAD
:
M
MS
(
GRAMS
). . . . 181.74
M
OVING
M
ASS
, D
IAPHRAGM
:
M
MD
(
GRAMS
) . . . 174.70
F
REE
-A
IR
R
ESONANCE
:
F
S
(H
Z
) . . . . . . . . 24.75
M
ECHANICAL
Q:
Q
MS
. . . . . . . . . . . 6.46
E
LECTRICAL
Q:
Q
ES
. . . . . . . . . . . . 0.46
T
OTAL
Q:
Q
TS
. . . . . . . . . . . . 0.43
M
AGNETIC
-G
AP
H
EIGHT
:
H
AG
(
IN
) . . . . . . . . . 1.30
H
AG
(
MM
) . . . . . . . 33.00
V
OICE
-C
OIL
H
EIGHT
:
H
VC
(
IN
) . . . . . . . . . 0.31
H
VC
(
MM
) . . . . . . . . 8.00
M
AXIMUM
E
XCURSION
:
X
MAX
(
IN
) . . . . . . . . 0.49
X
MAX
(
MM
) . . . . . . 12.50
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED
TRANSDUCER EXCURSION @ 300 W
JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com
GT120 12" Woofer – Technical Data
mounting depth
6.25" (158.75 mm)
cutout diameter
11.125" (283.00 mm)
outer diameter
12.25" (311.15 mm)
V
BOX
=
1.00 ft
3
(28.32 liters)
(stuffed with loosely-packed fiberfill)
GT120
(side view)
C
dB
100
90
80
70
60
50
40
30
20
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
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
20 Frequency 50 100 Hz 200 500 1k 2 k
