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Doubted for buy this manual as it is my first order here and at not have cover image, I assumed would haven't. However, within 24 hs, already possessed the link to download it. The manual are scanned correctly and have all what is needed. Includes adjustments and diagrams of all circuits. Very satisfied.
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Really good quality, аll readable.! Wonderful work shop. I recommend to all!
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Good quality service manual.The scheme is on A3 format and very readable.Thank you
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Very good service-manual with clear electrical diagrams. Thanks you.
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the manual is in quite good quality and it's in pdf. manual was send in less then 6h.
GT1281 12" Woofer � Technical Data
VENTED BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS) SEALED BANDPASS BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS)
length = 10.50"
Port
fo = 30.0 Hz
(2) Ports
fo = 60.0 Hz
length = 7.00"
GT1281
(side view)
GT1281
(side view)
diam. = 4"
VBOX = 2.25 ft3 (63.72 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
diameter = 4"
V
REAR (all sides lined with 1-inch fiberglass or fiberfill)
= 1.75 ft3 (49.56 liters)
V
FRONT
= 1.50 ft3 (42.48 liters)
VENTED FREQUENCY RESPONSE @ 2.83 V
100 95 dB In-Car 12 dB LP @ 80 Hz 95
SEALED BANDPASS FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz
90
Out-Of-Car
90
Out-Of-Car
85
85
80
80
75
75
70
70
65
65
60 20 Frequency 50 100 Hz 200 500 1k
C
60 20 Frequency 50 100 Hz 200 500 1k
C
2k
2k
VENTED EXCURSION/GROUP DELAY @ 400 W
20.0 Xd mM T mSec 20 17.5 15 17.5
SEALED BANDPASS EXCURSION/GROUP DELAY @ 300 W
20.0 Xd mM T mSec 40 30
15.0
10
15.0
20
12.5 Group Delay 10
5
12.5 Group Delay
10
0
10.0
0
7.5
-5
7.5
-10
5.0
-10
5.0 Transducer Excursion
-20
2.5
Transducer Excursion
-15
2.5
-30
0.0 20 Frequency 50 100 Hz 200 500 1k
C
-20
0.0 20 Frequency 50 100 Hz 200 500 1k
C
-40
2k
2k
Harman Consumer Group � 250 Crossways Park Drive � Woodbury, NY 11797 � VOICE: 516-496-3400 � FAX: 516-496-4868 � www.jbl.com
 $4.99 GT1281 JBL
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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