JBL DS120 - Sealed Enclosure Recommendations; Sealed Box Volume and Response; Sealed Enclosure Excursion and Group Delay; Vented Enclosure Recommendations

SEALED
BOX VOLUME
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED
EXCURSION/GROUP DELAY @ 100 W
VENTED
BOX VOLUME
VENTED
FREQUENCY RESPONSE @ 2.83 V
VENTED
EXCURSION/GROUP DELAY @ 175 W
DS120 12" Woofer – Technical Data
7•6 . . . . . . JBL Technical Data
V
BOX
= 1.50 ft
3
(42.48 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
DS120
(side view)
C
dB
95
90
85
80
75
70
65
60
55
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
C
Xd mM
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
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
DS120
(side view)
Port
f
o
= 34 Hz
diameter = 4.0"
length = 6.36"
V
BOX
= 2.50 ft
3
(70.80 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
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 @ 90 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
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