1200GTi 12" Woofer Technical Data

SPECIFICATIONS

DIAMETER: SENSITIVITY (2.83 V @ 1 M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE-COIL DIAMETER: DIMENSIONS:
mounting depth 4.25" (107.95 mm)

IMPEDANCE CURVE

12" (0.47 MM) 93 dB 600 WRMS 20 ~ 300 HZ 4 OHMS 4.0" (102.0 MM)

100.0 Ohms

1.Frequency Hz 1k 2k
cutout diameter 11.19" (284.16 mm) outer diameter 12.19" (309.56 mm)
INFINITE BAFFLE FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz 95

THIELE-SMALL PARAMETERS

VOICE COIL DC RESISTANCE: R EVC (OHMS). 2.50 VOICE COIL INDUCTANCE @ 1 KHZ: L EVC (M H). 0.98 S D (IN 2). 84.57 DRIVER RADIATING AREA: S D (CM2). 548.00 B L (TM). 12.48 MOTOR FORCE FACTOR: VAS (FT3). 2.40 COMPLIANCE VOLUME: VAS (LITERS). 56.66 C MS (M/N). 132.87 SUSPENSION COMPLIANCE: MMS (GRAMS). 139.26 MOVING MASS, AIR LOAD: MMD (GRAMS). 131.88 MOVING MASS, DIAPHRAGM: FS (HZ). 37.00 FREE-AIR RESONANCE: Q MS. 4.89 MECHANICAL Q: Q ES. 0.52 ELECTRICAL Q: Q TS. 0.47 TOTAL Q: HAG (IN). 0.32 MAGNETIC-GAP HEIGHT: HAG (MM). 8.12 HVC (IN). 0.75 VOICE-COIL HEIGHT: HVC (MM). 19.05 X MAX (IN). 0.22 MAXIMUM EXCURSION: X MAX (MM). 5.46

750. JBL Technical Data

Out-Of-Car

Frequency Hz 1k

INFINITE BAFFLE EXCURSION/GROUP DELAY @ 150 W
20.0 Xd mM T mSec 10.0 17.5 7.5

12.5 Group Delay 10.0

5.0 Transducer Excursion

0.Frequency Hz 1k

-10.0 2k
SEALED BOX VOLUME VENTED BOX VOLUME

length = 8.36"

fo = 31 Hz

GTi1200

(side view)
VBOX = 1.35 ft (38.23 liters) (all sides lined with 1-inch fiberglass or fiberfill)
VBOX = 2.50 ft (70.80 liters) (all sides lined with 1-inch fiberglass or fiberfill)

diameter = 4.0"

SEALED FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz 110
VENTED FREQUENCY RESPONSE @ 2.83 V
dB In-Car 12 dB LP @ 80 Hz

100 Out-Of-Car

SEALED EXCURSION/GROUP DELAY @ 300 W
20.0 Xd mM T mSec 10.0 20.0 17.5 Group Delay 15.0 5.0 7.5 17.5
VENTED EXCURSION/GROUP DELAY @ 300 W

Xd mM T mSec 10.0 7.5

15.0 Group Delay
10.0 Transducer Excursion 7.5

7.5 Transducer Excursion

JBL Technical Data. 751
SEALED BANDPASS BOX VOLUME NOTES

fo = 65 Hz

length = 12.61"
(side view) diam. = 4"

VREAR =

1.35 ft3 (38.23 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
VFRONT = 0.50 ft3 (14.16 liters)
SEALED BANDPASS FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS EXCURSION/GROUP DELAY @ 500 W
20.0 Xd mM T mSec 100 17.5 75
7.5 Transducer Excursion 5.0

-100 2k

752. JBL Technical Data