Gt800 8" Woofer – Technical Data

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GT800 8" Woofer – Technical Data SPECIFICATIONS DIAMETER: SENSITIVITY (2.83 V @ 1 M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE-COIL DIAMETER: DIMENSIONS: IMPEDANCE CURVE 8" (203.2 MM) 93 dB 200 WRMS 35 ~ 5,000 HZ 4 OHMS 1.5" (38.1 MM) 100.0 Ohms 30.0 10.0 3.0 mounting depth 3.82" (97.00 mm) 1.0 20 Frequency 100 Hz 200 500 1k 2k INFINITE BAFFLE FREQUENCY RESPONSE @ 2.83 V cutout diameter 7.13" (181.00 mm) outer diameter 8.32" (211.14 mm) 50 95 dB In-Car 12 dB LP @ 80 Hz 90 THIELE-SMALL PARAMETERS 85 Out-Of-Car VOICE COIL DC RESISTANCE: R EVC (OHMS) . . . . . . 3.03 VOICE COIL INDUCTANCE @ 1 KHZ: L EVC (M H). . . . . . . . 1.62 S D (IN 2) . . . . . . . . 33.02 DRIVER RADIATING AREA: S D (CM2). . . . . . . 214.00 B L (TM) . . . . . . . . . 9.06 MOTOR FORCE FACTOR: VAS (FT3). . . . . . . . . 1.04 COMPLIANCE VOLUME: VAS (LITERS). . . . . . 24.60 C MS (µM/N) . . . . 378.28 SUSPENSION COMPLIANCE: MMS (GRAMS) . . . . . 46.86 MOVING MASS, AIR LOAD: MOVING MASS, DIAPHRAGM: MMD (GRAMS). . . . . 45.06 FS (HZ) . . . . . . . . 37.80 FREE-AIR RESONANCE: Q MS . . . . . . . . . . . 12.42 MECHANICAL Q: Q ES . . . . . . . . . . . . 0.41 ELECTRICAL Q: Q TS . . . . . . . . . . . . 0.40 TOTAL Q: HAG (IN) . . . . . . . . . 0.31 MAGNETIC-GAP HEIGHT: HAG (MM) . . . . . . . . 7.92 HVC (IN) . . . . . . . . . 0.61 VOICE-COIL HEIGHT: HVC (MM) . . . . . . . 15.47 X MAX (IN) . . . . . . . . 0.15 MAXIMUM EXCURSION: X MAX (MM). . . . . . . . 3.77 80 75 70 65 60 55 C 20 Frequency 100 Hz 200 500 1k 2k INFINITE BAFFLE EXCURSION/GROUP DELAY @ 75 W 8.0 T mSec Xd mM 10.0 7.0 7.5 6.0 5.0 5.0 2.5 Group Delay 0.0 4.0 -2.5 3.0 Transducer Excursion 2.0 -5.0 1.0 -7.5 0.0 -10.0 2k C 20 7•8 . . . . . . JBL Technical Data 50 Frequency 50 100 Hz 200 500 1k GT800 8" Woofer – Technical Data VENTED BOX VOLUME SEALED BOX VOLUME length = 11.02" GT800 GT800 (side view) (side view) 3 VBOX = 0.61 ft (17.28 liters) (all sides lined with 1-inch fiberglass or fiberfill) 3 VBOX = 0.36 ft (10.20 liters) (all sides lined with 1-inch fiberglass or fiberfill) SEALED FREQUENCY RESPONSE @ 2.83 V 95 Port fo = 37 Hz diameter = 2.5" VENTED FREQUENCY RESPONSE @ 2.83 V dB 100 90 In-Car 12 dB LP @ 70 Hz 95 85 Out-Of-Car 90 dB In-Car 12 dB LP @ 90 Hz Out-Of-Car 80 85 75 80 70 75 65 70 60 65 55 60 C 20 Frequency 50 100 Hz 200 500 1k 2k SEALED EXCURSION/GROUP DELAY @ 100 W 8.0 Frequency 50 100 Hz 200 500 1k 2k VENTED EXCURSION/GROUP DELAY @ 100 W T mSec Xd mM C 20 10 40 T mSec Xd mM 20 Group Delay 7.5 35 15 5.0 30 10 5.0 2.5 25 5 4.0 0.0 20 0 3.0 -2.5 15 7.0 Transducer Excursion 6.0 Group Delay -5 Transducer Excursion 2.0 -5.0 10 -10 1.0 -7.5 5 -15 -10 0 0.0 C 20 Frequency 50 100 Hz 200 500 1k 2k C 20 Frequency 50 100 Hz 200 500 1k 2k JBL Technical Data . . . . . . 7•9 -20 GT800 8" Woofer – Technical Data SEALED BANDPASS BOX VOLUME NOTES Port fo = 80 Hz length = 9.85" GT800 (side view) diam. = 3" VREAR = 0.45 ft3 (12.74 liters) (all sides lined with 1-inch fiberglass or fiberfill) VFRONT = 0.20 ft3 (5.66 liters) SEALED BANDPASS FREQUENCY RESPONSE @ 2.83 V 95 In-Car 12 dB LP @ 80 Hz dB 90 Out-Of-Car 85 80 75 70 65 60 55 C 20 Frequency 50 100 Hz 200 500 1k 2k SEALED BANDPASS EXCURSION/GROUP DELAY @ 100 W 20.0 T mSec Xd mM 100 17.5 75 15.0 50 25 12.5 Group Delay 0 10.0 -25 7.5 Transducer Excursion 5.0 -50 2.5 -75 0.0 -100 2k C 20 Frequency 50 100 Hz 200 7•10 . . . . . JBL Technical Data 500 1k