JBL GT120
Manual de Servicio

GT120 12" Woofer � Technical Data
SPECIFICATIONS
DIAMETER: SENSITIVITY (2.83 V @ 1 M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE-COIL DIAMETER: DIMENSIONS:
mounting depth 6.25" (158.75 mm)

12" (304.8 MM) 93 dB 250 WRMS (1,000 WPEAK) 23 ~ 450 HZ 4 OHMS 2.0" (50.8 MM)

SEALED BOX VOLUME (INCLUDES DRIVER DISPLACEMENT)

GT120
(side view)

VBOX = 1.00 ft3 (28.32 liters)
(stuffed with loosely-packed fiberfill)

cutout diameter 11.125" (283.00 mm) outer diameter 12.25" (311.15 mm)

SEALED FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz 90 Out-Of-Car

THIELE-SMALL PARAMETERS
VOICE COIL DC RESISTANCE: R
EVC

80 70

(OHMS) . . . . . . 3.56

VOICE COIL INDUCTANCE @ 1 KHZ: L EVC (MH) . . . . . . . 2.54 DRIVER RADIATING AREA: MOTOR FORCE FACTOR: COMPLIANCE VOLUME: SUSPENSION COMPLIANCE: MOVING MASS, AIR LOAD: MOVING MASS, DIAPHRAGM: FREE-AIR RESONANCE: MECHANICAL Q: ELECTRICAL Q: TOTAL Q: MAGNETIC-GAP HEIGHT: VOICE-COIL HEIGHT: MAXIMUM EXCURSION: S D (IN 2) . . . . . . . . 82.31 S D (CM2) . . . . . . 531.00 BL (TM) . . . . . . . . 14.78 VAS (FT3) . . . . . . . . 3.22 VAS (LITERS) . . . . . 91.12 C MS (µM/N) . . . . 227.58 MMS (GRAMS). . . . 181.74 MMD (GRAMS) . . . 174.70 FS (HZ) . . . . . . . . 24.75 Q MS . . . . . . . . . . . 6.46 Q ES . . . . . . . . . . . . 0.46 Q TS . . . . . . . . . . . . 0.43 HAG (IN) . . . . . . . . . 1.30 HAG (MM) . . . . . . . 33.00 H (IN) . . . . . . . . . 0.31
VC

60 50 40

30
C

20 20 Frequency 50 100 Hz 200 500 1k

2k

SEALED TRANSDUCER EXCURSION @ 300 W
20.0 Xd mM 17.5 15.0

12.5

10.0

7.5

HVC (MM) . . . . . . . . 8.00 X MAX (IN) . . . . . . . . 0.49 X MAX (MM) . . . . . . 12.50

5.0 2.5 0.0 20 Frequency 50 100 Hz 200 500 1k
C

2k

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