DOWNLOAD JBL GT 1281 (serv.man2) Service Manual ↓ Size: 79.52 KB | Pages: 2 in PDF or view online for FREE

Model
GT 1281 (serv.man2)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
79.52 KB
Type
PDF
Document
Service Tips
Brand
Device
Car Audio
File
gt-1281-sm2.pdf
Date

JBL GT 1281 (serv.man2) Service Tips ▷ View online

SPECIFICATIONS
D
IAMETER
:
12" (304.8 
MM
)
S
ENSITIVITY
(2.83 V @ 1
M
):
93 dB
P
OWER
H
ANDLING
:
300 W
RMS
F
REQUENCY
R
ESPONSE
:
18 ~ 500 H
Z
N
OMINAL
I
MPEDANCE
:
OHMS
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
) . . . . . . 7.57
V
OICE
C
OIL
I
NDUCTANCE
@ 1 
K
H
Z
: L
EVC
(
M
H) . . . . . . . 1.74
D
RIVER
R
ADIATING
A
REA
:
S
D
(
IN
2
) . . . . . . . . 82.46
S
D
(
CM
2
) . . . . . . 532.00
M
OTOR
F
ORCE
F
ACTOR
:
B
L
(T
M
) . . . . . . . . 15.75
C
OMPLIANCE
V
OLUME
:
V
AS
(
FT
3
) . . . . . . . . 5.25
V
AS
(
LITERS
) . . . . 148.69
S
USPENSION
C
OMPLIANCE
:
C
MS
M
/N) . . . . 369.97
M
OVING
M
ASS
, A
IR
L
OAD
:
M
MS
(
GRAMS
). . . . 111.19
M
OVING
M
ASS
, D
IAPHRAGM
:
M
MD
(
GRAMS
) . . . 104.14
F
REE
-A
IR
R
ESONANCE
:
F
S
(H
Z
) . . . . . . . . 24.80
M
ECHANICAL
Q:
Q
MS
. . . . . . . . . . . 6.55
E
LECTRICAL
Q:
Q
ES
. . . . . . . . . . . . 0.53
T
OTAL
Q:
Q
TS
. . . . . . . . . . . . 0.49
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
) . . . . . . . . . 1.25
H
VC
(
MM
) . . . . . . . 31.75
M
AXIMUM
E
XCURSION
:
X
MAX
(
IN
) . . . . . . . .0.47
X
MAX
(
MM
) . . . . . . 11.91
SEALED BOX VOLUME 
(INCLUDES DRIVER DISPLACEMENT)
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED 
EXCURSION/GROUP DELAY @ 375 W
Harman Consumer Group  •  250 Crossways Park Drive  •  Woodbury, NY 11797  •  VOICE: 516-496-3400  •  FAX: 516-496-4868  •  www.jbl.com
GT1281 12" Woofer – Technical Data
mounting depth
6.00" (152.00 mm)
cutout diameter
11.125" (283.00 mm)
outer diameter
12.00" (304.80 mm)
V
BOX
 = 
 
1.25 ft
(35.40 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
GT1281
(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 
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
  0.0
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
VENTED BOX VOLUME 
(INCLUDES DRIVER/PORT DISPLACEMENTS)
VENTED
FREQUENCY RESPONSE @ 2.83 V
VENTED
EXCURSION/GROUP DELAY @ 400 W
SEALED BANDPASS BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
SEALED BANDPASS
FREQUENCY RESPONSE @ 2.83 V
SEALED BANDPASS
EXCURSION/GROUP DELAY @ 300 W
Harman Consumer Group  •  250 Crossways Park Drive  •  Woodbury, NY 11797  •  VOICE: 516-496-3400  •  FAX: 516-496-4868  •  www.jbl.com
GT1281 12" Woofer – Technical Data
GT1281
(side view)
Port
fo = 30.0 Hz
diameter = 4"
length = 10.50"
V
BOX
 = 
 
2.25 ft
(63.72 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
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
7.5
5.0
2.5
  0.0
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
V
REAR
 = 
 
1.75 ft
(49.56 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
V
FRONT 
  
1.50 ft
3
              (42.48 liters)
GT1281
(side view)
diam. = 4"
(2) Ports
fo= 60.0 Hz
length =
7.00"
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
 40
  30
  20
  10
  0
-10
-20
-30
-40
20       Frequency       50                      100 Hz                200                              500                      1k                      2 k    
Transducer Excursion
Group Delay
Display

JBL GT 1281 (serv.man2) Service Tips ▷ Download

  • DOWNLOAD JBL GT 1281 (serv.man2) Service Manual ↓ Size: 79.52 KB | Pages: 2 in PDF or view online for FREE
  • Here you can View online or download the Service Tips for the JBL GT 1281 (serv.man2) in PDF for free, which will help you to disassemble, recover, fix and repair JBL GT 1281 (serv.man2) Car Audio. Information contained in JBL GT 1281 (serv.man2) Service Tips (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.