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GT1500 15" Woofer � Technical Data
SEALED BOX VOLUME VENTED BOX VOLUME
length = 10.86"
(2) Ports
fo = 30 Hz
GT1500
(side view)
GT1500
(side view)
VBOX = 2.50 ft3 (70.80 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
VBOX = 4.00 ft3 (113.28 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
diameter = 4.0"
SEALED FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 65 Hz 105 95 Out-Of-Car 100
VENTED FREQUENCY RESPONSE @ 2.83 V
dB In-Car 12 dB LP @ 80 Hz
90
95
Out-Of-Car
85
90
80
85
75
80
70
75
65
70
60 20 Frequency 50 100 Hz 200 500 1k
C
65 20 Frequency 50 100 Hz 200 500 1k
C
2k
2k
SEALED EXCURSION/GROUP DELAY @ 200 W
20.0 Xd mM T mSec 20 17.5 15 17.5
VENTED EXCURSION/GROUP DELAY @ 250 W
20.0 Xd mM T mSec 20 15
15.0
10
15.0
10
12.5
Group Delay
5
12.5
Group Delay
5
10.0
0
10.0
0
7.5 Transducer Excursion 5.0
-5 -10
7.5 5.0 Transducer Excursion
-5 -10
2.5
-15
2.5
-15
0 20 Frequency 50 100 Hz 200 500 1k
C
-20
0 20 Frequency 50 100 Hz 200 500 1k
C
-20
2k
2k
JBL Technical Data . . . . . 7�27
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