JBL GT120D Manuale di istruzioni

SPECIFICATIONS

DIAMETER: 12" (304.8 MM)

SENSITIVITY (2.83 V @ 1 M): 93 dB

POWER HANDLING: 250 WRMS (1,000 WPEAK)

FREQUENCY RESPONSE: 23 ~ 450 HZ

NOMINAL IMPEDANCE:4OHMS

VOICE-COIL DIAMETER: 2.0" (50.8 MM)

DIMENSIONS:

THIELE-SMALL PARAMETERS

VOICE COIL DCRESISTANCE:R

EVC (OHMS) . . . . . . 3.56

VOICE COIL INDUCTANCE @ 1 KHZ:L

EVC (MH) . . . . . . . 2.54

DRIVER RADIATING AREA:S

D(IN2) . . . . . . . . 82.31

SD(CM2) . . . . . . 531.00

MOTOR FORCE FACTOR:BL(TM) . . . . . . . . 14.78

COMPLIANCE VOLUME:V

AS (FT3) . . . . . . . . 3.22

VAS (LITERS) . . . . . 91.12

SUSPENSION COMPLIANCE:C

MS (µM/N) . . . . 227.58

MOVING MASS, AIR LOAD:M

MS (GRAMS). . . . 181.74

MOVING MASS, DIAPHRAGM:M

MD (GRAMS) . . . 174.70

FREE-AIR RESONANCE:F

S(HZ) . . . . . . . . 24.75

MECHANICAL Q: QMS . . . . . . . . . . . 6.46

ELECTRICAL Q: QES . . . . . . . . . . . . 0.46

TOTAL Q: QTS . . . . . . . . . . . . 0.43

MAGNETIC-GAP HEIGHT:H

AG (IN) . . . . . . . . . 1.30

HAG (MM) . . . . . . . 33.00

VOICE-COIL HEIGHT:H

VC (IN) . . . . . . . . . 0.31

HVC (MM) . . . . . . . . 8.00

MAXIMUM EXCURSION:X

MAX (IN) . . . . . . . . 0.49

XMAX (MM) . . . . . . 12.50

SEALED BOX VOLUME

(INCLUDES DRIVER DISPLACEMENT)

SEALED

FREQUENCY RESPONSE @ 2.83 V

SEALED

TRANSDUCER EXCURSION @ 300 W

JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com

GT120d 12" Woofer – Technical Data

mounting depth

6.25" (158.75 mm)

cutout diameter

11.125" (283.00 mm)

outer diameter

12.25" (311.15 mm)

VBOX = 1.00 ft3 (28.32 liters)

(stuffed with loosely-packed fiberfill)

GT120d

(side view)

100

20 20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP@ 80Hz

Xd mM

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

0.0 20 Frequency 50 100 Hz 200 500 1k 2k

VENTED BOX VOLUME

(INCLUDES DRIVER/PORT DISPLACEMENTS)

VENTED

FREQUENCY RESPONSE @ 2.83 V

VENTED

TRANSDUCER EXCURSION @ 300 W

SEALED BANDPASS BOX VOLUME

(INCLUDES DRIVER/PORT DISPLACEMENTS

)

SEALED BANDPASS

FREQUENCY RESPONSE @ 2.83 V

SEALED BANDPASS

TRANSDUCER EXCURSION @ 300 W

JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com

GT120d 12" Woofer – Technical Data

GT120d

(side view)

Port

fo= 30.0 Hz

diameter = 4"

length = 13.31"

VBOX = 2.25 ft3 (63.72 liters)

(no fiberfill)

110

100

30 20 Frequency 50 100Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP@ 80Hz

Xd mM

0 20 Frequency 50 100 Hz 200 500 1k 2k

VFRONT = 2.00 ft3

(56.64 liters)

(stuffed with loosely-packed

fiberfill)

diam. = 6"

Port

fo= 45.0 Hz length =

10.57"

VREAR = 1.50 ft3 (42.48 liters)

(stuffed with loosely-packed fiberfill)

GT120d

(side view)

110

100

30 20 Frequency 50 100Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP@ 80Hz

Xd mM

20 Frequency 50 100Hz 200 500 1k 2k

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

0.0

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