JBL DS120 Instruction manual

Ohms
100.0
1.0
3.0
10.0
30.0
20 Frequency 50 100 Hz 200 500 1k 2k
C
dB
105
100
95
90
85
80
75
70
65
20 Frequency 50 100 Hz 200 500 1k 2k
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
0.0
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 2k
Transducer Excursion
Group Delay
mounting depth
5.06" (128.56 mm)
cutout diameter
10.88" (276.23 mm)
outer diameter
12.13" (307.98 mm)
SPECIFICATIONS
DIAMETER: 12" (304.8 MM)
SENSITIVITY (2.83 V @ 1 M): 95 dB
POWER HANDLING: 200 WRMS
FREQUENCY RESPONSE: 30 ~ 3,000 HZ
NOMINAL IMPEDANCE:4OHMS
VOICE-COIL DIAMETER: 1.95" (49.50 MM)
DIMENSIONS:
THIELE-SMALL PARAMETERS
VOICE COIL DCRESISTANCE:R
EVC (OHMS) . . . . . . 4.40
VOICE COIL INDUCTANCE @ 1 KHZ:L
EVC (MH). . . . . . . . 2.31
DRIVER RADIATING AREA:S
D(IN2) . . . . . . . . 77.62
SD(CM2). . . . . . . 503.00
MOTOR FORCE FACTOR:BL(TM) . . . . . . . . 12.42
COMPLIANCE VOLUME:V
AS (FT3). . . . . . . . . 5.40
VAS (LITERS). . . . . 127.28
SUSPENSION COMPLIANCE:C
MS (µM/N) . . . . 354.26
MOVING MASS, AIR LOAD:M
MS (GRAMS). . . . . 73.41
MOVING MASS, DIAPHRAGM:M
MD (GRAMS). . . . . 66.92
FREE-AIR RESONANCE:F
S(HZ) . . . . . . . . 31.21
MECHANICAL Q: QMS . . . . . . . . . . . . 5.09
ELECTRICAL Q: QES . . . . . . . . . . . . 0.41
TOTAL Q: QTS . . . . . . . . . . . . 0.38
MAGNETIC-GAP HEIGHT:H
AG (IN) . . . . . . . . . 0.31
HAG (MM) . . . . . . . . 8.00
VOICE-COIL HEIGHT:H
VC (IN) . . . . . . . . . 0.67
HVC (MM) . . . . . . . 17.00
MAXIMUM EXCURSION:X
MAX (IN) . . . . . . . . 0.18
XMAX (MM). . . . . . . . 4.50
IMPEDANCE CURVE
INFINITE BAFFLE
FREQUENCY RESPONSE @ 2.83 V
INFINITE BAFFLE
EXCURSION/GROUP DELAY @ 50 W
DS120 12" Woofer – Technical Data
JBL Technical Data . . . . . . 7•5

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
VBOX = 1.50 ft3 (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 2k
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 2k
Transducer Excursion
Group Delay
DS120
(side view)
Port
fo= 34 Hz
diameter = 4.0"
length = 6.36"
VBOX = 2.50 ft3 (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 2k
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 2k
Transducer Excursion
Group Delay

SEALED BANDPASS
BOX VOLUME
SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS
EXCURSION/GROUP DELAY @ 125 W
NOTES
VREAR = 1.60 ft3 (45.31 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
VFRONT = 0.60 ft3
(17.00 liters)
DS120
(side view)
diam. = 4"
Port
fo= 65 Hz
length =
9.94"
C
dB
100
95
90
85
80
75
70
65
60
20 Frequency 50 100 Hz 200 500 1k 2k
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
0.0
T mSec 40
30
20
10
0
-10
-20
-30
-40
20 Frequency 50 100 Hz 200 500 1k 2k
Transducer Excursion
Group Delay
DS120 12" Woofer – Technical Data
JBL Technical Data . . . . . . 7•7