JBL P-1200 Manuale di istruzioni
SPECIFICATIONS
DIAMETER: 12" (305.0 MM)
SENSITIVITY (2.83 V @ 1 M): 92 dB
POWER HANDLING: 280 WRMS
FREQUENCY RESPONSE: 25 HZ~ 2 KHZ
NOMINAL IMPEDANCE:5OHMS
VOICE-COIL DIAMETER: 2.0" (50.7 MM)
DIMENSIONS:
THIELE-SMALL PARAMETERS
VOICE COIL DCRESISTANCE:R
EVC (OHMS) . . . . . . 4.50
VOICE COIL INDUCTANCE @ 1 KHZ:L
EVC (MH). . . . . . . . 1.00
DRIVER RADIATING AREA:S
D(IN2) . . . . . . . . 85.03
SD(CM2). . . . . . . 551.00
MOTOR FORCE FACTOR:BL(TM) . . . . . . . . 13.10
COMPLIANCE VOLUME:V
AS (FT3). . . . . . . . . 5.21
VAS (LITERS). . . . . 123.00
SUSPENSION COMPLIANCE:C
MS (µM/N) . . . . 285.30
MOVING MASS, AIR LOAD:M
MS (GRAMS). . . . . 98.65
MOVING MASS, DIAPHRAGM:M
MD (GRAMS). . . . . 91.00
FREE-AIR RESONANCE:F
S(HZ) . . . . . . . . 30.00
MECHANICAL Q: QMS . . . . . . . . . . . . 5.50
ELECTRICAL Q: QES . . . . . . . . . . . . 0.49
TOTAL Q: QTS . . . . . . . . . . . . 0.45
MAGNETIC-GAP HEIGHT:H
AG (IN) . . . . . . . . . 7.11
HAG (MM) . . . . . . . . 0.28
VOICE-COIL HEIGHT:H
VC (IN) . . . . . . . . 22.61
HVC (MM) . . . . . . . . 0.90
MAXIMUM EXCURSION:X
MAX (IN) . . . . . . . . 0.31
XMAX (MM). . . . . . . . 7.75
IMPEDANCE CURVE
INFINITE BAFFLE
FREQUENCY RESPONSE @ 2.83 V
INFINITE BAFFLE
EXCURSION/GROUP DELAY @ 75 W
P1200 12" Woofer – Technical Data
7•38 . . . . . JBL Technical Data
mounting depth
5.70" (144.78 mm)
cutout diameter
11.13" (274.32 mm)
outer diameter
12.00" (304.80 mm)
Ohms
100.0
1.0
3.0
10.0
30.0
20 Frequency 50 100 Hz 200 500 1k 2k
C
dB
105
100
95
90
85
80
75
70
65
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
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
P1200
(side view)
Port
fo= 35 Hz
diameter = 4.0"
length = 8.11"
VBOX = 2.00 ft3 (56.64 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
C
dB
100
95
90
80
75
70
65
60
55
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
T mSec 40
30
20
10
0
-10
-20
-30
-40
20 Frequency 50 100 Hz 200 500 1k 2k
Transducer Excursion
Group Delay
VBOX = 1.50 ft3 (42.48 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
P1200
(side view)
C
dB
95
90
85
80
75
70
65
60
55
20 Frequency 50 100 Hz 200 500 1k 2k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
C
Xd mM
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
T mSec 20
15
10
5
0.0
-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 @ 225 W
VENTED
BOX VOLUME
VENTED
FREQUENCY RESPONSE @ 2.83 V
VENTED
EXCURSION/GROUP DELAY @ 350 W
P1200 12" Woofer – Technical Data
JBL Technical Data . . . . . 7•39
SEALED BANDPASS
BOX VOLUME
SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS
EXCURSION/GROUP DELAY @ 200 W
NOTES
P1200 12" Woofer – Technical Data
7•40 . . . . . JBL Technical Data
VREAR =
1.50 ft3 (42.48 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
P1200
(side view)
VFRONT = 0.77 ft3
(21.81 liters)
(all sides lined with 1-inch
fiberglass or fiberfill)
diam. = 4"
Port
fo= 65 Hz
length =
5.27"
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 @ 90 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
T mSec 40
30
20
10
0
-10
-20
-30
-40
20 Frequency 50 100 Hz 200 500 1k 2k
Transducer Excursion
Group Delay
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