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VENTED BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
VENTED
FREQUENCY RESPONSE @ 2.83 V
VENTED
TRANSDUCER EXCURSION @ 400 W
SEALED BANDPASS BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS
)
SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS
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
GTO1220D 12" Woofer – Technical Data
GTO1220D
(side view)
Port
f
o
= 30.0 Hz
diameter = 4"
length = 13.31"
V
BOX
=
2.25 ft
3
(63.72 liters)
(no fiberfill)
C
dB
110
105
100
95
90
85
80
75
70
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
V
REAR
=
1.50 ft
3
(42.48 liters)
(stuffed with loosely-packed fiberfill)
GTO1220D
(side view)
V
FRONT
=
2.00 ft
3
(56.64 liters)
(stuffed with loosely-packed
fiberfill)
diam. = 6"
Port
f
o
= 45.0 Hz
length =
10.57
C
dB
110
105
100
95
90
85
80
75
70
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