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User manual JBL 1800GTI - DOCUMENT
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 | JBL 1800GTI |  |
This product, although classified under the brand JBL, may have been manufactured by UREI after mergers, acquisitions, or a change in name.
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Manual abstract: user guide JBL 1800GTI - DOCUMENT
Detailed instructions for use are in the User's Guide.
1800GTi18" Woofer  Technical Data
SPECIFICATIONS
DIAMETER: SENSITIVITY (2.83 V @ 1 M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE-COIL DIAMETER: DIMENSIONS:
mounting depth 6.81" (173.04 mm)
IMPEDANCE CURVE
18" (0.71 MM) 95 dB 600 WRMS 20 ~ 300 HZ 4 OHMS 4.0" (102 MM)
100.0 Ohms
30.0
10.0
3.0
1.0 20 Frequency 50 100 Hz 200 500 1k 2k
cutout diameter 16.88" (428.63 mm) outer diameter 18.25" (463.55 mm)
INFINITE BAFFLE FREQUENCY RESPONSE @ 2.83 V
110 dB In-Car 12 dB LP @ 70 Hz 105
THIELE-SMALL PARAMETERS
VOICE COIL DC RESISTANCE: R EVC (OHMS) . . . . . . 2.50 VOICE COIL INDUCTANCE @ 1 KHZ: L EVC (MH). . . . . . . . 0.98 S D (IN 2) . . . . . . . 195.99 DRIVER RADIATING AREA: S D (CM2). . . . . . 1270.00 BL (TM) . . . . . . . . 13.51 MOTOR FORCE FACTOR: VAS (FT3). . . . . . . . 15.37 COMPLIANCE VOLUME: VAS (LITERS). . . . . 362.61 C MS (µM/N) . . . . 158.32 SUSPENSION COMPLIANCE: MMS (GRAMS) . . . . 177.77 MOVING MASS, AIR LOAD: MMD (GRAMS). . . . 151.75 MOVING MASS, DIAPHRAGM: FS (HZ) . . . . . . . . 30.00 FREE-AIR RESONANCE: Q MS . . . . . . . . . . . . 6.77 MECHANICAL Q: Q ES . . . . . . . . . . . . 0.46 ELECTRICAL Q: Q TS . . . . . . . . . . . . 0.43 TOTAL Q: HAG (IN) . . . . . . . . . 0.32 MAGNETIC-GAP HEIGHT: HAG (MM) . . . . . . . . 8.13 HVC (IN) . . . . . . . . . 0.75 VOICE-COIL HEIGHT: HVC (MM) . . . . . . . 19.05 X MAX (IN) . . . . . . . . 0.22 MAXIMUM EXCURSION: X MAX (MM). . . . . . . . 5.46
7·56 . . . . . JBL Technical Data
100 Out-Of-Car 95
90
85
80
75
70 20 Frequency 50 100 Hz 200 500 1k
C
2k
INFINITE BAFFLE EXCURSION/GROUP DELAY @ 150 W
20.0 Xd mM T mSec 10.0 17.5 7.5
15.0
5.0
12.5 Group Delay 10.0
2.5
0.0
7.5
-2.5
5.0
-5.0
2.5
Transducer Excursion
-7.5
0.0 20 Frequency 50 100 Hz 200 500 1k
-10.0 2k
C
1800GTi18" Woofer  Technical Data
SEALED BOX VOLUME VENTED BOX VOLUME
length = 5.47"
(3) Ports
fo = 28 Hz
GTi1800
(side view)
GTi1800
(side view)
VBOX = 6.50 ft (184.08 liters) (all sides lined with 1-inch fiberglass or fiberfill)
3
VBOX = 11.90 ft (337.01 liters) (all sides lined with 1-inch fiberglass or fiberfill)
3
diameter = 4.0"
SEALED FREQUENCY RESPONSE @ 2.83 V
105 dB In-Car 12 dB LP @ 70 Hz 115 100 Out-Of-Car 95 110
VENTED FREQUENCY RESPONSE @ 2.83 V
dB In-Car 12 dB LP @ 80 Hz
105 Out-Of-Car
90
100
85
95
80
90
75
85
70
80
65 20 Frequency 50 100 Hz 200 500 1k
C
75 20 Frequency 50 100 Hz 200 500 1k
C
2k
2k
SEALED EXCURSION/GROUP DELAY @ 600 W
20.0 Xd mM T mSec 10.0 40 17.5 7.5 35
VENTED EXCURSION/GROUP DELAY @ 600 W
Xd mM T mSec 40 30
15.0
5.0
30
Group Delay
20
12.5 Group Delay 10.0
2.5
25
10
0.0
20
0
7.5
-2.5
15 Transducer Excursion
-10
5.0 Transducer Excursion
-5.0
10
-20
2.5
-7.5
5
-30
0 20 Frequency 50 100 Hz 200 500 1k
-10.0 2k
C
0 20 Frequency 50 100 Hz 200 500 1k
C
-40
2k
JBL Technical Data . . . . . 7·57
1800GTi18" Woofer  Technical Data
SEALED BANDPASS BOX VOLUME
(3) Ports
fo = 55 Hz length = 9.11"
NOTES
GTi1800
(side view) diam. = 4"
VREAR = 6.50 ft3 (184.08 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
VFRONT = 2.20 ft3 (62.30 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
SEALED BANDPASS FREQUENCY RESPONSE @ 2.83 V
110 dB In-Car 12 dB LP @ 80 Hz 105
100 Out-Of-Car 95
90
85
80
75
70 20 Frequency 50 100 Hz 200 500 1k
C
2k
SEALED BANDPASS EXCURSION/GROUP DELAY @ 600 W
20.0 Xd mM T mSec 40 17.5 30
15.0 Group Delay
20
12.5
10
10.0
0
7.5 Transducer Excursion
-10
5.0
-20
2.5
-30
0.0 20 Frequency 50 100 Hz 200 500 1k
C
-40
2k
7·58 . . . . . JBL Technical Data
...
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