[. . . ] [. . . ] 7·39
P1200 12" Woofer Technical Data
SEALED BANDPASS BOX VOLUME
Port
fo = 65 Hz length = 5. 27"
NOTES
P1200
(side view) diam. = 4"
VREAR = 1. 50 ft3 (42. 48 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
VFRONT = 0. 77 ft3 (21. 81 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
SEALED BANDPASS FREQUENCY RESPONSE @ 2. 83 V
100 dB In-Car 12 dB LP @ 90 Hz 95 Out-Of-Car
90
85
80
75
70
65
60 20 Frequency 50 100 Hz 200 500 1k
C
2k
SEALED BANDPASS EXCURSION/GROUP DELAY @ 200 W
20. 0 Xd mM T mSec 40 17. 5 30
15. 0
20
12. 5
Group Delay
10
10. 0
0
7. 5
-10
5. 0 Transducer Excursion
-20
2. 5
-30
0. 0 20 Frequency 50 100 Hz 200 500 1k
C
-40
2k
7·40 . [. . . ] [. . . ]