SPECIFICATIONS
D
IAMETER
:
18" (0.71
MM
)
S
ENSITIVITY
(2.83 V @ 1
M
):
95 dB
P
OWER
H
ANDLING
:
600 W
RMS
F
REQUENCY
R
ESPONSE
:
20 ~ 300 H
Z
N
OMINAL
I
MPEDANCE
:
4
OHMS
V
OICE
-C
OIL
D
IAMETER
:
4.0" (102
MM
)
D
IMENSIONS
:
THIELE-SMALL PARAMETERS
V
OICE
C
OIL
D
C
R
ESISTANCE
:
R
EVC
(
OHMS
) . . . . . . 2.50
V
OICE
C
OIL
I
NDUCTANCE
@ 1
K
H
Z
: L
EVC
(
M
H). . . . . . . . 0.98
D
RIVER
R
ADIATING
A
REA
:
S
D
(
IN
2
) . . . . . . . 195.99
S
D
(
CM
2
) . . . . . . 1270.00
M
OTOR
F
ORCE
F
ACTOR
:
B
L
(T
M
) . . . . . . . . 13.51
C
OMPLIANCE
V
OLUME
:
V
AS
(
FT
3
). . . . . . . . 15.37
V
AS
(
LITERS
). . . . . 362.61
S
USPENSION
C
OMPLIANCE
:
C
MS
(µ
M
/N) . . . . 158.32
M
OVING
M
ASS
, A
IR
L
OAD
:
M
MS
(
GRAMS
) . . . . 177.77
M
OVING
M
ASS
, D
IAPHRAGM
:
M
MD
(
GRAMS
). . . . 151.75
F
REE
-A
IR
R
ESONANCE
:
F
S
(H
Z
) . . . . . . . . 30.00
M
ECHANICAL
Q:
Q
MS
. . . . . . . . . . . . 6.77
E
LECTRICAL
Q:
Q
ES
. . . . . . . . . . . . 0.46
T
OTAL
Q:
Q
TS
. . . . . . . . . . . . 0.43
M
AGNETIC
-G
AP
H
EIGHT
:
H
AG
(
IN
) . . . . . . . . . 0.32
H
AG
(
MM
) . . . . . . . . 8.13
V
OICE
-C
OIL
H
EIGHT
:
H
VC
(
IN
) . . . . . . . . . 0.75
H
VC
(
MM
) . . . . . . . 19.05
M
AXIMUM
E
XCURSION
:
X
MAX
(
IN
) . . . . . . . . 0.22
X
MAX
(
MM
). . . . . . . . 5.46
IMPEDANCE CURVE
INFINITE BAFFLE
FREQUENCY RESPONSE @ 2.83 V
INFINITE BAFFLE
EXCURSION/GROUP DELAY @ 150 W
1800GTi18" Woofer – Technical Data
7•56 . . . . . JBL Technical Data
mounting depth
6.81" (173.04 mm)
cutout diameter
16.88" (428.63 mm)
outer diameter
18.25" (463.55 mm)
Ohms
100.0
1.0
3.0
10.0
30.0
20 Frequency 50 100 Hz 200 500 1k 2k
C
dB
110
105
100
95
90
85
80
75
70
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 70 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
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
