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[. . . ] [. . . ] 139. 26 MOVING MASS, AIR LOAD: MMD (GRAMS). 131. 88 MOVING MASS, DIAPHRAGM: FS (HZ) . JBL Technical Data
90
Out-Of-Car
85
80
75
70
65
60 20 Frequency 50 100 Hz 200 500 1k
C
2k
INFINITE BAFFLE EXCURSION/GROUP DELAY @ 150 W
20. 0 Xd mM T mSec 10. 0 17. 5 7. 5
15. 0
5. 0
12. 5 Group Delay 10. 0
2. 5
0. 0
7. 5
-2. 5
5. 0 Transducer Excursion
-5. 0
2. 5
-7. 5
0. 0 20 Frequency 50 100 Hz 200 500 1k
-10. 0 2k
C
1200GTi 12" Woofer Technical Data
SEALED BOX VOLUME VENTED BOX VOLUME
length = 8. 36"
Port
fo = 31 Hz
GTi1200
(side view)
GTi1200
(side view)
VBOX = 1. 35 ft (38. 23 liters) (all sides lined with 1-inch fiberglass or fiberfill)
3
VBOX = 2. 50 ft (70. 80 liters) (all sides lined with 1-inch fiberglass or fiberfill)
3
diameter = 4. 0"
SEALED FREQUENCY RESPONSE @ 2. 83 V
100 dB In-Car 12 dB LP @ 80 Hz 95 105 110
VENTED FREQUENCY RESPONSE @ 2. 83 V
dB In-Car 12 dB LP @ 80 Hz
90
Out-Of-Car
100 Out-Of-Car
85
95
80
90
75
85
70
80
65
75
60 20 Frequency 50 100 Hz 200 500 1k
C
70 20 Frequency 50 100 Hz 200 500 1k
C
2k
2k
SEALED EXCURSION/GROUP DELAY @ 300 W
20. 0 Xd mM T mSec 10. 0 20. 0 17. 5 Group Delay 15. 0 5. 0 7. 5 17. 5
VENTED EXCURSION/GROUP DELAY @ 300 W
Xd mM T mSec 10. 0 7. 5
15. 0 Group Delay
5. 0
12. 5
2. 5
12. 5
2. 5
10. 0 Transducer Excursion 7. 5
0. 0
10. 0
0. 0
-2. 5
7. 5 Transducer Excursion
-2. 5
5. 0
-5. 0
5. 0
-5. 0
2. 5
-7. 5
2. 5
-7. 5
0. 0 20 Frequency 50 100 Hz 200 500 1k
-10. 0 2k
C
0 20 Frequency 50 100 Hz 200 500 1k
-10. 0 2k
C
JBL Technical Data . 7·51
1200GTi 12" Woofer Technical Data
SEALED BANDPASS BOX VOLUME NOTES
Port
fo = 65 Hz
length = 12. 61"
GTi1200
(side view) diam. [. . . ] [. . . ]
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