JBL GT1241D Instruction manual

SPECIFICATIONS

DIAMETER: 12" (304.8 MM)

SENSITIVITY (2.83 V @ 1 M): 93 dB

POWER HANDLING: 300 WRMS

FREQUENCY RESPONSE: 18 ~ 500 HZ

NOMINAL IMPEDANCE:4OHMS (PER COIL)

VOICE-COIL DIAMETER: 2.0" (50.7 MM)

DIMENSIONS:

THIELE-SMALL PARAMETERS*

VOICE COIL DCRESISTANCE:R

EVC (OHMS) . . . . . . 1.92

VOICE COIL INDUCTANCE @ 1 KHZ:L

EVC (MH) . . . . . . . 1.33

DRIVER RADIATING AREA:S

D(IN2) . . . . . . . . 82.46

SD(CM2) . . . . . . 532.00

MOTOR FORCE FACTOR:BL(TM) . . . . . . . . . 9.09

COMPLIANCE VOLUME:V

AS (FT3) . . . . . . . . 5.17

VAS (LITERS) . . . . 146.33

SUSPENSION COMPLIANCE:C

MS (µM/N) . . . . 354.09

MOVING MASS, AIR LOAD:M

MS (GRAMS). . . . 143.74

MOVING MASS, DIAPHRAGM:M

MD (GRAMS) . . . 136.69

FREE-AIR RESONANCE:F

S(HZ) . . . . . . . . 22.00

MECHANICAL Q: QMS . . . . . . . . . . . 8.35

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

TOTAL Q: QTS . . . . . . . . . . . . 0.44

MAGNETIC-GAP HEIGHT:H

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

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

VOICE-COIL HEIGHT:H

VC (IN) . . . . . . . . . 1.25

HVC (MM) . . . . . . . 31.75

MAXIMUM EXCURSION:X

MAX (IN) . . . . . . . .0.47

XMAX (MM) . . . . . . 11.91

*VOICE COILS CONNECTED IN PARALLEL

SEALED BOX VOLUME

(INCLUDES DRIVER DISPLACEMENT)

SEALED

FREQUENCY RESPONSE @ 2.83 V

SEALED

EXCURSION/GROUP DELAY @ 300 W

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

GT1241D 12" Woofer – Technical Data

mounting depth

6.00" (152.00 mm)

cutout diameter

11.125" (283.00 mm)

outer diameter

12.00" (304.80 mm)

VBOX = 1.25 ft3 (35.40 liters)

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

GT1241D

(side view)

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

VENTED BOX VOLUME (INCLUDES

(INCLUDES DRIVER/PORT DISPLACEMENTS)

VENTED

FREQUENCY RESPONSE @ 2.83 V

VENTED

EXCURSION/GROUP DELAY @ 300 W

SEALED BANDPASS BOX VOLUME

(INCLUDES DRIVER/PORT DISPLACEMENTS)

SEALED BANDPASS

FREQUENCY RESPONSE @ 2.83 V

SEALED BANDPASS

EXCURSION/GROUP DELAY @ 300 W

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

GT1241D 12" Woofer – Technical Data

GT1241D

(side view)

Port

fo= 35.0 Hz

diameter = 4"

length = 8.00"

VBOX = 2.00 ft3 (56.64 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 @ 80 Hz

Xd mM

T mSec 20

-5

-10

-15

-20

20 Frequency 50 100 Hz 200 500 1k 2k

Transducer Excursion

Group Delay

VREAR =

2.50 ft3 (70.80 liters)

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

VFRONT =

1.25 ft3

(35.40 liters)

GT1241D

(side view)

diam. = 4"

(2)Ports

fo= 55.0 Hz

length =

11.00"

105

100

20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP @ 60 Hz

Xd mM

T mSec 20

-5

-10

-15

-20

20 Frequency 50 100 Hz 200 500 1k 2k

Transducer Excursion

Group Delay

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