JBL GT1281
Instrukcja Serwisowa

GT1281 12" Woofer � Technical Data
VENTED BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS) SEALED BANDPASS BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS)

length = 10.50"

Port
fo = 30.0 Hz

(2) Ports
fo = 60.0 Hz

length = 7.00"

GT1281
(side view)

GT1281
(side view)

diam. = 4"

VBOX = 2.25 ft3 (63.72 liters)
(all sides lined with 1-inch fiberglass or fiberfill)

diameter = 4"

V

REAR (all sides lined with 1-inch fiberglass or fiberfill)

= 1.75 ft3 (49.56 liters)

V

FRONT

= 1.50 ft3 (42.48 liters)

VENTED FREQUENCY RESPONSE @ 2.83 V
100 95 dB In-Car 12 dB LP @ 80 Hz 95

SEALED BANDPASS FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz

90

Out-Of-Car

90

Out-Of-Car

85

85

80

80

75

75

70

70

65

65

60 20 Frequency 50 100 Hz 200 500 1k

C

60 20 Frequency 50 100 Hz 200 500 1k

C

2k

2k

VENTED EXCURSION/GROUP DELAY @ 400 W
20.0 Xd mM T mSec 20 17.5 15 17.5

SEALED BANDPASS EXCURSION/GROUP DELAY @ 300 W
20.0 Xd mM T mSec 40 30

15.0

10

15.0

20

12.5 Group Delay 10

5

12.5 Group Delay

10

0

10.0

0

7.5

-5

7.5

-10

5.0

-10

5.0 Transducer Excursion

-20

2.5

Transducer Excursion

-15

2.5

-30

0.0 20 Frequency 50 100 Hz 200 500 1k

C

-20

0.0 20 Frequency 50 100 Hz 200 500 1k

C

-40

2k

2k

Harman Consumer Group � 250 Crossways Park Drive � Woodbury, NY 11797 � VOICE: 516-496-3400 � FAX: 516-496-4868 � www.jbl.com