JBL P1220D Manuale di istruzioni

SPECIFICATIONS

DIAMETER: 12" (304.8 MM)

SENSITIVITY (2.83 V @ 1 M): 95 dB

POWER HANDLING: 400 WRMS (1,600 WPEAK)

FREQUENCY RESPONSE: 20 ~ 450 HZ

NOMINAL IMPEDANCE:2OHMS (PER COIL)

VOICE-COIL DIAMETER: 3.0" (76.2 MM)

DIMENSIONS:

THIELE-SMALL PARAMETERS*

VOICE COIL DCRESISTANCE:R

EVC (OHMS) . . . . . 0.860

VOICE COIL INDUCTANCE @ 1 KHZ:L

EVC (MH) . . . . . . 0.330

DRIVER RADIATING AREA:S

D(IN2) . . . . . . . . 74.71

SD(CM2) . . . . . . 482.00

MOTOR FORCE FACTOR:BL(TM) . . . . . . . . 7.608

COMPLIANCE VOLUME:V

AS (FT3) . . . . . . . 1.649

VAS (LITERS) . . . . . 46.70

SUSPENSION COMPLIANCE:C

MS (µM/N) . . . . 141.55

MOVING MASS, AIR LOAD:M

MS (GRAMS). . . . 197.03

MOVING MASS, DIAPHRAGM:M

MD (GRAMS) . . . 190.95

FREE-AIR RESONANCE:F

S(HZ) . . . . . . . . 30.14

MECHANICAL Q: QMS . . . . . . . . . . . 6.38

ELECTRICAL Q: QES . . . . . . . . . . . . 0.56

TOTAL Q: QTS . . . . . . . . . . . . 0.51

MAGNETIC-GAP HEIGHT:H

AG (IN) . . . . . . . . . 0.47

HAG (MM) . . . . . . . 12.00

VOICE-COIL HEIGHT:H

VC (IN) . . . . . . . . . 1.72

HVC (MM) . . . . . . . 43.80

MAXIMUM EXCURSION:X

MAX (IN) . . . . . . . .0.63

XMAX (MM) . . . . . . 15.90

*VOICE COILS CONNECTED IN PARALLEL

SEALED BOX VOLUME

(INCLUDES DRIVER DISPLACEMENT)

SEALED

FREQUENCY RESPONSE @ 2.83 V

SEALED

TRANSDUCER EXCURSION @ 400 W

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

P1220D 12" Woofer – Technical Data

mounting depth

6.75" (172.00 mm)

cutout diameter

11.00" (280.00 mm)

outer diameter

12.31" (313.00 mm)

VBOX = 1.00 ft3 (28.32 liters)

(stuffed with loosely-packed fiberfill)

P1220D

(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

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 @ 400 W

SEALED BANDPASS BOX VOLUME

(INCLUDES DRIVER/PORT DISPLACEMENTS

)

SEALED BANDPASS

FREQUENCY RESPONSE @ 2.83 V

SEALED BANDPASS

TRANSDUCER EXCURSION @ 400 W

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

P1220D 12" Woofer – Technical Data

P1220D

(side view)

Port

fo= 28.0 Hz

diameter = 4"

length = 12.58"

VBOX = 2.25 ft3 (63.72 liters)

(stuffed with loosely-packed fiberfill)

115

110

105

100

20 Frequency 50 100 Hz 200 500 1k 2k

Out-Of-Car

In-Car

12 dB LP @ 80 Hz

Xd mM

20 Frequency 50 100 Hz 200 500 1k 2k

VREAR =

1.50 ft3 (42.48 liters)

(stuffed with loosely-packed fiberfill)

P1220D

(side view)

VFRONT =

2.00 ft3

(56.64 liters)

(stuffed with loosely-packed

fiberfill)

diam. = 6"

Port

fo= 44.9 Hz

length =

10.50"

110

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

20 Frequency 50 100 Hz 200 500 1k 2k

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