JBL GT1200 Manuale di istruzioni

SPECIFICATIONS

DIAMETER: 12" (304.8 MM)

SENSITIVITY (2.83 V @ 1 M): 95 dB

POWER HANDLING: 280 WRMS

FREQUENCY RESPONSE: 25 ~ 3,000 HZ

NOMINAL IMPEDANCE:4OHMS

VOICE-COIL DIAMETER: 2.0" (50.7 MM)

DIMENSIONS:

THIELE-SMALL PARAMETERS

VOICE COIL DCRESISTANCE:R

EVC (OHMS) . . . . . . 3.17

VOICE COIL INDUCTANCE @ 1 KHZ:L

EVC (MH). . . . . . . . 2.16

DRIVER RADIATING AREA:S

D(IN2) . . . . . . . . 82.10

SD(CM2). . . . . . . 532.00

MOTOR FORCE FACTOR:BL(TM) . . . . . . . . 12.82

COMPLIANCE VOLUME:V

AS (FT3). . . . . . . . . 6.60

VAS (LITERS). . . . . 155.73

SUSPENSION COMPLIANCE:C

MS (µM/N) . . . . 387.48

MOVING MASS, AIR LOAD:M

MS (GRAMS) . . . . 105.69

MOVING MASS, DIAPHRAGM:M

MD (GRAMS). . . . . 98.64

FREE-AIR RESONANCE:F

S(HZ) . . . . . . . . 24.80

MECHANICAL Q: QMS . . . . . . . . . . . 11.76

ELECTRICAL Q: QES . . . . . . . . . . . . 0.32

TOTAL Q: QTS . . . . . . . . . . . . 0.31

MAGNETIC-GAP HEIGHT:H

AG (IN) . . . . . . . . . 0.31

HAG (MM) . . . . . . . . 7.92

VOICE-COIL HEIGHT:H

VC (IN) . . . . . . . . . 0.88

HVC (MM) . . . . . . . 22.23

MAXIMUM EXCURSION:X

MAX (IN) . . . . . . . . .0.28

XMAX (MM). . . . . . . . 7.15

IMPEDANCE CURVE

INFINITE BAFFLE

FREQUENCY RESPONSE @ 2.83 V

INFINITE BAFFLE

EXCURSION/GROUP DELAY @ 75 W

GT1200 12" Woofer – Technical Data

7•20 . . . . . JBL Technical Data

Ohms

100.0

1.0

3.0

10.0

30.0

20 Frequency 50 100 Hz 200 500 1k 2k

105

100

20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP @ 80 Hz

Xd mM

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

0.0

T mSec 10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

-7.5

-10.0

20 Frequency 50 100 Hz 200 500 1k 2k

Transducer Excursion

Group Delay

mounting depth

5.75" (146.05 mm)

cutout diameter

11.13" (283.00 mm)

outer diameter

12.18" (309.44 mm)

VBOX = 1.20 ft3 (33.98 liters)

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

GT1200

(side view)

100

20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP @ 90 Hz

Xd mM

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

0.0

T mSec 10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

-7.5

-10.0

20 Frequency 50 100 Hz 200 500 1k 2k

Transducer Excursion

Group Delay

GT1200

(side view)

Port

fo= 30 Hz

diameter = 4.0"

length = 14.00"

VBOX = 1.80 ft3 (50.98 liters)

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

105

100

20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP @ 90 Hz

Xd mM

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

T mSec 20

-5

-10

-15

-20

20 Frequency 50 100 Hz 200 500 1k 2k

Transducer Excursion

Group Delay

SEALED

BOX VOLUME

SEALED

FREQUENCY RESPONSE @ 2.83 V

SEALED

EXCURSION/GROUP DELAY @ 250 W

VENTED

BOX VOLUME

VENTED

FREQUENCY RESPONSE @ 2.83 V

VENTED

EXCURSION/GROUP DELAY @ 275 W

GT1200 12" Woofer – Technical Data

JBL Technical Data . . . . . 7•21

SEALED BANDPASS

BOX VOLUME

SEALED BANDPASS

FREQUENCY RESPONSE @ 2.83 V

SEALED BANDPASS

EXCURSION/GROUP DELAY @ 200 W

NOTES

GT1200 12" Woofer – Technical Data

7•22 . . . . . JBL Technical Data

VREAR =

1.20 ft3 (33.98 liters)

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

VFRONT =

0.50 ft3

(14.16 liters)

GT1200

(side view)

diam. = 4"

Port

fo= 70 Hz

length =

8.11"

100

20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP @ 95 Hz

Xd mM

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

0.0

T mSec 40

-10

-20

-30

-40

20 Frequency 50 100 Hz 200 500 1k 2k

Transducer Excursion

Group Delay

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