User manual JBL L20T3
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Manual abstract: user guide JBL L20T3
Detailed instructions for use are in the User's Guide.
[. . . ] [. . . ] L20T3 12" Woofer Technical Data
SPECIFICATIONS
DIAMETER: SENSITIVITY (2. 83 V @ 1 M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE-COIL DIAMETER: DIMENSIONS:
mounting depth 5. 70" (144. 78 mm)
IMPEDANCE CURVE
12" (305. 0 MM) 92 dB 280 WRMS 25 HZ ~ 2 KHZ 5 OHMS 2. 0" (50. 7 MM)
100. 0 Ohms
30. 0
10. 0
3. 0
1. 0 20 Frequency 50 100 Hz 200 500 1k 2k
cutout diameter 11. 13" (274. 32 mm) outer diameter 12. 00" (304. 80 mm)
INFINITE BAFFLE FREQUENCY RESPONSE @ 2. 83 V
105 dB In-Car 12 dB LP @ 80 Hz 100
THIELE-SMALL PARAMETERS
VOICE COIL DC RESISTANCE: R EVC (OHMS) . JBL Technical Data
95
90 Out-Of-Car 85
80
75
70
65 20 Frequency 50 100 Hz 200 500 1k
C
2k
INFINITE BAFFLE EXCURSION/GROUP DELAY @ 75 W
20. 0 Xd mM T mSec 10. 0 17. 5 7. 5
15. 0
5. 0
12. 5 Group Delay 10. 0
2. 5
0. 0
7. 5
-2. 5
5. 0
-5. 0
2. 5 Transducer Excursion 0. 0 20 Frequency 50 100 Hz 200 500 1k
-7. 5
-10. 0 2k
C
L20T3 12" Woofer Technical Data
SEALED BOX VOLUME VENTED BOX VOLUME
length = 8. 11"
Port
fo = 35 Hz
L20T3
(side view)
L20T3
(side view)
VBOX = 1. 50 ft (42. 48 liters) (all sides lined with 1-inch fiberglass or fiberfill)
3
VBOX = 2. 00 ft (56. 64 liters) (all sides lined with 1-inch fiberglass or fiberfill)
3
diameter = 4. 0"
SEALED FREQUENCY RESPONSE @ 2. 83 V
95 dB In-Car 12 dB LP @ 80 Hz 100 90 Out-Of-Car 95
VENTED FREQUENCY RESPONSE @ 2. 83 V
dB In-Car 12 dB LP @ 80 Hz
Out-Of-Car 85 90
80
80
75
75
70
70
65
65
60
60
55 20 Frequency 50 100 Hz 200 500 1k
C
55 20 Frequency 50 100 Hz 200 500 1k
C
2k
2k
SEALED EXCURSION/GROUP DELAY @ 225 W
8. 0 Xd mM T mSec 20 20. 0 7. 0 15 17. 5
VENTED EXCURSION/GROUP DELAY @ 350 W
Xd mM T mSec 40 30
6. 0
10
15. 0
20
5. 0 Group Delay 4. 0
5
12. 5 Group Delay
10
0. 0
10. 0
0
3. 0
-5
7. 5
-10
2. 0 Transducer Excursion 1. 0
-10
5. 0
-20
-15
2. 5 Transducer Excursion
-30
0. 0 20 Frequency 50 100 Hz 200 500 1k
C
-20
0 20 Frequency 50 100 Hz 200 500 1k
C
-40
2k
2k
JBL Technical Data . [. . . ] [. . . ]
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