GT 1200D - JBL Car Audio Service Tips (repair manual)

Model: GT 1200D
Pages: 3 Few pages! See other manuals at the bottom of the first or last page.
Size: 141.88 KB
Type: PDF
Document: Service Tips
Brand: JBL
Device: Car Audio
File: gt-1200d.pdf
Date: 2018-11-20

Next: JBL GT 1200D (serv.man2) User Guide / Operation Manual

Read JBL GT 1200D Service Tips online

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
mounting depth
5.75" (146.05 mm)
cutout diameter
11.13" (283.00 mm)
outer diameter
12.18" (309.44 mm)
SPECIFICATIONS
D
IAMETER
:
12" (304.8 
MM
)
S
ENSITIVITY
(2.83V @ 1 
M
):
95 dB
P
OWER
H
ANDLING
:
280 W
RMS
F
REQUENCY
R
ESPONSE
:
25 ~ 3,000 H
Z
N
OMINAL
I
MPEDANCE
:
4 
OHMS
(
PER COIL
)
V
OICE
-C
OIL
D
IAMETER
:
2.0" (50.7 
MM
)
D
IMENSIONS
:
THIELE-SMALL PARAMETERS*
V
OICE
C
OIL
D
C
R
ESISTANCE
:
R
EVC
(
OHMS
) . . . . . . 1.60
V
OICE
C
OIL
I
NDUCTANCE
@ 1 
K
H
Z
: L
EVC
(
M
H) . . . . . . . 1.12
D
RIVER
R
ADIATING
A
REA
:
S
D
(
IN
2) . . . . . . . . 82.10
S
D
(
CM
2) . . . . . . 532.00
M
OTOR
F
ORCE
F
ACTOR
:
B
L
(T
M
) . . . . . . . . . 7.42
C
OMPLIANCE
V
OLUME
:
V
AS
(
FT
3) . . . . . . . . 7.12
V
AS
(
LITERS
) . . . . 168.00
S
USPENSION
C
OMPLIANCE
:
C
MS
(µ
M
/N) . . . . 420.00
M
OVING
M
ASS
, A
IR
L
OAD
:
M
MS
(
GRAMS
). . . . . 99.41
M
OVING
M
ASS
, D
IAPHRAGM
:
M
MD
(
GRAMS
) . . . . 92.36
F
REE
-A
IR
R
ESONANCE
:
F
S
(H
Z
) . . . . . . . . 24.63
M
ECHANICAL
Q:
Q
MS
. . . . . . . . . . . 11.29
E
LECTRICAL
Q:
Q
ES
. . . . . . . . . . . . 0.48
T
OTAL
Q:
Q
TS
. . . . . . . . . . . . 0.43
M
AGNETIC
-G
AP
H
EIGHT
:
H
AG
(
IN
) . . . . . . . . . 0.31
H
AG
(
MM
) . . . . . . . . 7.92
V
OICE
-C
OIL
H
EIGHT
:
H
VC
(
IN
) . . . . . . . . . 0.88
H
VC
(
MM
) . . . . . . . 22.23
M
AXIMUM
E
XCURSION
:
X
MAX
(
IN
). . . . . . . . .0.28
X
MAX
(
MM
) . . . . . . . 7.15
*
VOICE COILS CONNECTED IN PARALLEL
IMPEDANCE CURVE
INFINITE BAFFLE
FREQUENCY RESPONSE @ 2.83 V
INFINITE BAFFLE
EXCURSION/GROUP DELAY @ 75 W
GT1200d 12" Woofer – Technical Data
JBL Technical Data . . . . . 7•23

SEALED 
BOX VOLUME
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED 
EXCURSION/GROUP DELAY @ 175 W
VENTED
BOX VOLUME
VENTED
FREQUENCY RESPONSE @ 2.83 V
VENTED
EXCURSION/GROUP DELAY @ 225 W
GT1200d 12" Woofer – Technical Data
7•24 . . . . . JBL Technical Data
V
BOX
 = 
 
1.25 ft
3 
(35.40 liters)
(stuffed with loosely-packed fiberfill)
GT1200d
(side view)
C
dB    
100
   95
   90
   85
   80
   75
   70
   65
   60
20       Frequency       50                      100 Hz                200                              500                      1k                      2 k    
Out-Of-Car
In-Car
12 dB LP @ 80 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
GT1200d
(side view)
Port
fo = 30 Hz
diameter = 4.0"
length = 12.26"
V
BOX
 = 
 
2.00 ft
3 
(56.64 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
 20
  15
  10
  5
  0
-5
-10
-15
-20
20       Frequency       50                      100 Hz                200                              500                      1k                      2 k    
Transducer Excursion
Group Delay

SEALED BANDPASS
BOX VOLUME
SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS
EXCURSION/GROUP DELAY @ 150 W
NOTES
V
REAR
 = 
 
1.20 ft
3 
(33.98 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
V
FRONT 
= 
  
0.60 ft
3
              (16.99 liters)
GT1200d
(side view)
diam. = 4"
Port
fo= 65 Hz
length =
9.95"
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
  0.0
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
GT1200d 12" Woofer – Technical Data
JBL Technical Data . . . . . 7•25

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