Transcript
GT4-15 380mm Woofer – Technical Data ®
SPECIFICATIONS DIAMETER: SENSITIVITY (2.83V @ 1M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE COIL DIAMETER: DIMENSIONS:
SEALED BOX VOLUME (INCLUDES DRIVER DISPLACEMENT)
15" (380MM) 91DB 250WRMS/1000WPEAK 20HZ ~ 400HZ 4 OHMS 2" (50.70MM)
GT4-15 (side view)
3
VBOX = 1.50 ft (42.48 liters) (all sides lined with 1-inch fiberglass insulation or fiberfill)
mounting depth 6.75" (172.00mm)
SEALED FREQUENCY RESPONSE @ 2.83V
cutout diameter 14.25" (362.00mm) outer diameter 15.125" (384.17mm)
100
dB In-Car 12dB LP @ 80Hz
90
THIELE-SMALL PARAMETERS
80 Out-Of-Car
VOICE COIL DC RESISTANCE: R EVC (OHMS) . . . . . . 3.60 VOICE COIL INDUCTANCE @ 1KHZ: L EVC (M H) . . . . . . . 3.10 S D (IN 2) . . . . . . . 132.53 DRIVER RADIATING AREA: S D (CM2) . . . . . . 855.00 B L (TM) . . . . . . . . 18.32 MOTOR FORCE FACTOR: VAS (FT3) . . . . . . . . 4.70 COMPLIANCE VOLUME: VAS (LITERS) . . . . 133.00 C MS (µM/N) . . . . 128.12 SUSPENSION COMPLIANCE: MMS (GRAMS). . . . 245.80 MOVING MASS, AIR LOAD: MMD (GRAMS) . . . 231.42 MOVING MASS, DIAPHRAGM: FS (HZ) . . . . . . . . 28.36 FREE-AIR RESONANCE: Q MS . . . . . . . . . . . 7.35 MECHANICAL Q: Q ES . . . . . . . . . . . . 0.47 ELECTRICAL Q: Q TS . . . . . . . . . . . . 0.44 TOTAL Q: HAG (IN) . . . . . . . . . 1.30 MAGNETIC-GAP HEIGHT: HAG (MM) . . . . . . . 33.00 HVC (IN) . . . . . . . . . 0.31 VOICE COIL HEIGHT: HVC (MM) . . . . . . . . 8.00 X MAX (IN) . . . . . . . . 0.49 MAXIMUM EXCURSION: X MAX (MM) . . . . . . 12.50
70
60
50
40
30
20
C
20 Frequency
50
100Hz
200
500
1k
2k
SEALED TRANSDUCER EXCURSION @ 250W 20.0
XD mM
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
C
20 Frequency
50
100Hz
200
500
JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • www.jbl.com
1k
2k
GT4-15 380mm Woofer – Technical Data ®
VENTED BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS)
SEALED BANDPASS BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS) Port
length = 15.13"
fo = 40Hz
Port fo = 28Hz
GT4-15
GT4-15 (side view)
(side view)
diam. = 6"
4 ft3 (113.27 liters)
VBOX = (all sides lined with 1-inch fiberglass or fiberfill)
diameter = 6"
VENTED FREQUENCY RESPONSE @ 2.83V 110
110
(all sides lined with 1-inch fiberglass insulation or fiberfill)
(all sides lined with 1-inch fiberglass insulation or fiberfill)
dB
100
90 Out-Of-Car
Out-Of-Car
80
70
70
60
60
50
50
40
40
30
C
30 20 Frequency
50
100Hz
200
500
1k
2k
20.0
35
17.5
30
15.0
25
12.5
20
10.0
15
7.5
10
5.0
5
2.5
C
20 Frequency
50
100Hz
200
500
1k
50
100Hz
200
500
1k
2k
SEALED BANDPASS TRANSDUCER EXCURSION @ 250W
Xd mM
0
C
20 Frequency
VENTED TRANSDUCER EXCURSION @ 250W 40
VFRONT = 2 ft3 (56.63 liters)
In-Car 12dB LP @ 80Hz
In-Car 12dB LP @ 80Hz
90
80
VREAR = 3.40 ft3 (96.28 liters)
SEALED BANDPASS FREQUENCY RESPONSE @ 2.83V
dB
100
length = 14.73"
2k
Xd mM
0.0
C
20 Frequency
50
100Hz
200
500
JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • www.jbl.com
1k
2k
