SPECIFICATIONS
DIAMETER: 12" (304.8 MM)
S
ENSITIVITY (2.83 V @ 1 M): 91 dB
P
OWER HANDLING: 300 W
RMS
(1,200 W
PEAK
)
F
REQUENCY RESPONSE: 20 ~ 450 HZ
NOMINAL IMPEDANCE:2 OHMS
VOICE-COIL DIAMETER: 3.0" (76.2 MM)
D
IMENSIONS:
THIELE-SMALL PARAMETERS
VOICE COIL DC RESISTANCE:R
EVC
(OHMS) . . . . . . 2.04
V
OICE COIL INDUCTANCE @ 1 KHZ:L
EVC
(MH) . . . . . . . 0.70
D
RIVER RADIATING AREA:S
D
(IN
2
) . . . . . . . . 74.71
S
D
(CM
2
) . . . . . . 482.00
M
OTOR FORCE FACTOR:BL (TM) . . . . . . . . 12.33
C
OMPLIANCE VOLUME:V
AS
(FT
3
) . . . . . . . . 1.73
V
AS
(LITERS) . . . . . 49.03
S
USPENSION COMPLIANCE:C
MS
(µM/N) . . . . 148.61
M
OVING MASS, AIR LOAD:M
MS
(GRAMS). . . . 220.77
MOVING MASS, DIAPHRAGM:M
MD
(GRAMS) . . . 214.68
F
REE-AIR RESONANCE:F
S
(HZ) . . . . . . . . 27.79
M
ECHANICAL Q: Q
MS
. . . . . . . . . . . 6.18
E
LECTRICAL Q: Q
ES
. . . . . . . . . . . . 0.52
T
OTAL Q: Q
TS
. . . . . . . . . . . . 0.48
M
AGNETIC-GAP HEIGHT:H
AG
(IN) . . . . . . . . . 0.47
H
AG
(MM) . . . . . . . 12.00
V
OICE-COIL HEIGHT:H
VC
(
IN) . . . . . . . . . 1.28
H
VC
(MM) . . . . . . . 32.50
M
AXIMUM EXCURSION:X
MAX
(IN) . . . . . . . . 0.40
X
MAX
(
MM) . . . . . . 10.25
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED
TRANSDUCER EXCURSION @ 400 W
JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com
GTO1220 12" Woofer – Technical Data
mounting depth
6.81" (174.00 mm)
cutout diameter
10.88" (277.00 mm)
outer diameter
12.31" (313.00 mm)
V
BOX
=
1.00 ft
3
(28.32 liters)
(stuffed with loosely-packed fiberfill)
GTO1220
(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
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
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