GTI800 - Thiele-Small Parameters & Technical Specs (Dimensions, frequency response, optimal box etc.)

800GTi 8" Woofer – Technical Data

SPECIFICATIONS IMPEDANCE CURVE

DIAMETER: 8" (0.32 MM) 100.0 Ohms

SENSITIVITY (2.83 V @ 1 M): 90 dB

POWER HANDLING: 300 WRMS 30.0
FREQUENCY RESPONSE: 30 HZ ~ 1 KHZ 10.0

NOMINAL IMPEDANCE: 4 OHMS

VOICE-COIL DIAMETER: 3.0" (76 MM)

DIMENSIONS: 3.0

mounting depth 1.0
4.00" (101.6 mm) 20 Frequency

50 100 Hz 200 500 1k 2k

cutout diameter INFINITE BAFFLE
7.07" (179.39 mm) FREQUENCY RESPONSE @ 2.83 V

outer diameter 95 dB
8.32" (211.14 mm)
In-Car
90 12 dB LP @ 80 Hz

THIELE-SMALL PARAMETERS 85

VOICE COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.20 80 Out-Of-Car

VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH). . . . . . . . 0.49 75

DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 32.41 70

SD (CM2). . . . . . . 210.00 65

MOTOR FORCE FACTOR: BL (TM) . . . . . . . . 10.09

COMPLIANCE VOLUME: VAS (FT3). . . . . . . . . 0.33 60
VAS (LITERS). . . . . . . 7.79
SUSPENSION COMPLIANCE: CMS (µM/N) . . . . 124.39 55 50 100 Hz 200 500 1k C
MOVING MASS, AIR LOAD: MMS (GRAMS) . . . . . 45.36 20 Frequency
MOVING MASS, DIAPHRAGM: MMD (GRAMS). . . . . 43.61 2k
FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 67.00
MECHANICAL Q: QMS. . . . . . . . . . . . 4.80 INFINITE BAFFLE
ELECTRICAL Q: QES . . . . . . . . . . . . 0.60 EXCURSION/GROUP DELAY @ 75 W
TOTAL Q: QTS . . . . . . . . . . . . 0.53
MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 0.28 8.0 Xd mM T mSec 10.0
HAG (MM) . . . . . . . . 7.11
VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 0.75 7.0 7.5
HVC (MM) . . . . . . . 19.05
MAXIMUM EXCURSION: XMAX (IN) . . . . . . . . 0.23 6.0 5.0
XMAX (MM). . . . . . . . 5.97
5.0 2.5
Group Delay 0.0

4.0

3.0 -2.5
Transducer Excursion -5.0

2.0

1.0 -7.5

0.0 100 Hz 200 C -10.0
20 Frequency 50 500 1k 2 k

7•44 . . . . . JBL Technical Data

SEALED 800GTi 8" Woofer – Technical Data
BOX VOLUME
VENTED
BOX VOLUME

length = 7.99" Port

GTi800 GTi800 fo = 51 Hz

(side view) (side view)

VBOX = 0.30 ft3 (8.50 liters) VBOX = 0.28 ft3 (7.93 liters) diameter = 2.0"

(all sides lined with 1-inch fiberglass or fiberfill) (all sides lined with 1-inch fiberglass or fiberfill)

SEALED VENTED
FREQUENCY RESPONSE @ 2.83 V FREQUENCY RESPONSE @ 2.83 V

95 dB 105 dB In-Car
12 dB LP @ 80 Hz

90 100
In-Car
12 dB LP @ 70 Hz 95 Out-Of-Car

85

80 90
Out-Of-Car
85
75

70 80

65 75

60 70

55 100 Hz 200 500 1k C 100 Hz 200 500 1k C
20 Frequency 50
65 2k
2 k 20 Frequency 50

SEALED VENTED
EXCURSION/GROUP DELAY @ 200 W EXCURSION/GROUP DELAY @ 375 W

8.0 Xd mM T mSec 10.0 20.0 Xd mM T mSec 20

7.0 7.5 17.5 15

6.0 5.0 15.0 10

5.0 2.5 12.5 Group Delay 5
0
Group Delay

4.0 0.0 10.0

3.0 -2.5 7.5 -5
-10
Transducer Excursion -15
2.0 -5.0 5.0

Transducer Excursion

1.0 -7.5 2.5

0.0 C -10.0 0 C -20
20 Frequency 50 500 1k 2 k
100 Hz 200 500 1k 2 k 20 Frequency 50 100 Hz 200

JBL Technical Data . . . . . 7•45

SEALED BANDPASS 800GTi 8" Woofer – Technical Data
BOX VOLUME
NOTES

Port length =

fo= 93 Hz 8.46"

GTi800

(side view)

VREAR = 0.28 ft3 (7.93 liters) diam. = 3"

(all sides lined with 1-inch fiberglass or fiberfill) VFRONT = 0.20 ft3
(5.66 liters)

SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V

95 dB

In-Car
90 12 dB LP @ 70 Hz

85

80 Out-Of-Car

75

70

65

60

55 100 Hz 200 500 1k C
20 Frequency 50
2k

SEALED BANDPASS
EXCURSION/GROUP DELAY @ 300 W

20.0 Xd mM T mSec 40

17.5 30

15.0 20

12.5 Group Delay 10

10.0 0

7.5 -10

5.0 Transducer Excursion -20

2.5 -30

0.0 100 Hz 200 C -40
20 Frequency 50 500 1k 2 k

7•46 . . . . . JBL Technical Data