Read JBL 1800.4 GTi Service Tips online
GTi1800
(side view)
(3) Ports
fo = 28 Hz
diameter = 4.0"
length = 5.47"
V
BOX
=
11.90 ft
3
(337.01 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
C
dB
115
110
105
100
95
90
85
80
75
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
12 dB LP @ 80 Hz
C
Xd mM
40
35
30
25
20
15
10
5
0
T mSec
40
30
20
10
0
-10
-20
-30
-40
20 Frequency 50 100 Hz 200 500 1k 2 k
Transducer Excursion
Group Delay
V
BOX
=
6.50 ft
3
(184.08 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
GTi1800
(side view)
C
dB
105
100
95
90
85
80
75
70
65
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 70 Hz
12 dB LP @ 70 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
T mSec
10.0
7.5
5.0
2.5
0.0
-2.5
-5.0
-7.5
-10.0
20 Frequency 50 100 Hz 200 500 1k 2 k
Transducer Excursion
Group Delay
SEALED
BOX VOLUME
BOX VOLUME
SEALED
FREQUENCY RESPONSE @ 2.83 V
FREQUENCY RESPONSE @ 2.83 V
SEALED
EXCURSION/GROUP DELAY @ 600 W
EXCURSION/GROUP DELAY @ 600 W
VENTED
BOX VOLUME
BOX VOLUME
VENTED
FREQUENCY RESPONSE @ 2.83 V
FREQUENCY RESPONSE @ 2.83 V
VENTED
EXCURSION/GROUP DELAY @ 600 W
EXCURSION/GROUP DELAY @ 600 W
1800GTi18" Woofer – Technical Data
JBL Technical Data . . . . . 7•57
Click on the first or last page to see other 1800.4 GTi service manuals if exist.