JBL GT120 Technical Data Manual

Contents

specifications

SPECIFICATIONSDIAMETER: 12" (304.8 MM)SENSITIVITY (2.83 V @ 1 M): 93 dBPOWER HANDLING: 250 WRMS (1,000 WPEAK)FREQUENCY RESPONSE: 23 ~ 450 HZNOMINAL IMPEDANCE: 4 OHMSVOICE-COIL DIAMETER: 2.0" (50.8 MM)DIMENSIONS:THIELE-SMALL PARAMETERSVOICE COIL DC RESISTANCE: R EVC (OHMS) . . . . . . 3.56VOICE COIL INDUCTANCE @ 1 KHZ: L EVC (M H) . . . . . . . 2.54DRIVER RADIATING AREA: S D (IN 2) . . . . . . . . 82.31S D (CM2) . . . . . . 531.00MOTOR FORCE FACTOR: B L (TM) . . . . . . . . 14.78COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 3.22VAS (LITERS) . . . . . 91.12SUSPENSION COMPLIANCE: C MS (μM/N) . . . . 227.58MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 181.74MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 174.70FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 24.75MECHANICAL Q: Q MS . . . . . . . . . . . 6.46ELECTRICAL Q: Q ES . . . . . . . . . . . . 0.46TOTAL Q: Q TS . . . . . . . . . . . . 0.43MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 1.30HAG (MM) . . . . . . . 33.00VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 0.31HVC (MM) . . . . . . . . 8.00MAXIMUM EXCURSION: X MAX (IN) . . . . . . . . 0.49X MAX (MM) . . . . . . 12.50SEALED BOX VOLUME(INCLUDES DRIVER DISPLACEMENT)SEALEDFREQUENCY RESPONSE @ 2.83 VSEALEDTRANSDUCER EXCURSION @ 300 WJBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.comGT120 12" Woofer – Technical Datamounting depth6.25" (158.75 mm)cutout diameter11.125" (283.00 mm)outer diameter12.25" (311.15 mm)VBOX = 1.00 ft3 (28.32 liters)(stuffed with loosely-packed fiberfill)GT120(side view)CdB100908070605040302020 Frequency 50 100 Hz 200 500 1k 2 kOut-Of-CarIn-Car12 dB LP @ 80 HzCXd mM20.017.515.012.510.07.55.02.50.020 Frequency 50 100 Hz 200 500 1k 2 k

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