JBL P1220 Gebrauchsanweisung
SPECIFICATIONS
DIAMETER: 12" (304.8 MM)
SENSITIVITY (2.83 V @ 1 M): 91 dB
POWER HANDLING: 400 WRMS (1,600 WPEAK)
FREQUENCY RESPONSE: 20 ~ 450 HZ
NOMINAL IMPEDANCE:2OHMS
VOICE-COIL DIAMETER: 3.0" (76.2 MM)
DIMENSIONS:
THIELE-SMALL PARAMETERS
VOICE COIL DCRESISTANCE:R
EVC (OHMS) . . . . . . 1.95
VOICE COIL INDUCTANCE @ 1 KHZ:L
EVC (MH) . . . . . . . 0.99
DRIVER RADIATING AREA:S
D(IN2) . . . . . . . . 74.71
SD(CM2) . . . . . . 482.00
MOTOR FORCE FACTOR:BL(TM) . . . . . . . . 12.50
COMPLIANCE VOLUME:V
AS (FT3) . . . . . . . . 1.67
VAS (LITERS) . . . . . 47.40
SUSPENSION COMPLIANCE:C
MS (µM/N) . . . . 143.68
MOVING MASS, AIR LOAD:M
MS (GRAMS). . . . 214.80
MOVING MASS, DIAPHRAGM:M
MD (GRAMS) . . . 208.72
FREE-AIR RESONANCE:F
S(HZ) . . . . . . . . 28.65
MECHANICAL Q: QMS . . . . . . . . . . . 6.71
ELECTRICAL Q: QES . . . . . . . . . . . . 0.48
TOTAL Q: QTS . . . . . . . . . . . . 0.45
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
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED
TRANSDUCER EXCURSION @ 450 W
JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com
P1220 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)
P1220
(side view)
C
dB
100
95
90
85
80
75
70
65
60
20 Frequency 50 100 Hz 200 500 1k 2k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
C
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 @ 500 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
P1220 12" Woofer – Technical Data
P1220
(side view)
Port
fo= 28.0 Hz
diameter = 4"
length = 12.58"
VBOX = 2.25 ft3 (63.72 liters)
(stuffed with loosely-packed fiberfill)
C
dB
110
105
100
95
90
85
80
75
70
20 Frequency 50 100 Hz 200 500 1k 2k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
C
Xd mM
40
35
30
25
20
15
10
5
0
20 Frequency 50 100 Hz 200 500 1k 2k
VREAR =
1.50 ft3 (42.48 liters)
(stuffed with loosely-packed fiberfill)
P1220
(side view)
VFRONT =
2.00 ft3
(56.64 liters)
(stuffed with loosely-packed
fiberfill)
diam. = 6"
Port
fo= 44.9 Hz
length =
10.50"
C
dB
110
105
100
95
90
85
80
75
70
20 Frequency 50 100 Hz 200 500 1k 2k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
C
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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