A U T O M O T I V E S U B W O O F E R S
SERIES
Grand Touring® Series
GT1041, GT1041D, GT1081, GT1241, GT1241D, GT1281
Owner’s Manual
Figure 2. Series connection
To design a subwoofer system that
m axim izes available am plifier power,
keep the following rules in m ind:
1. The total system im pedance of
woofers in parallel = 1/(1/w1 + 1/w2
1/w3...) where w is the nom inal im ped-
ance of the woofer.
2. The total system im pedance of voice
Connecting Your Subw oofer to Your
Am plifier
2. You m ay connect the coils of a dual-
voice-coil woofer in series, but NEVER
connect separate woofers in series.
Because the am plifier-dam ping factor
(the am plifier’s ability to control the
m otion of the woofer) is expressed as
a ratio of term inal im pedance (the sum
of speaker im pedance, wire resistance
and the D.C. resistance of any
crossover coil connected to the
woofer) to am plifier-output im ped-
ance, connecting woofers in series
reduces the dam ping factor of the
am plifier to a value less than 1. This
will result in poor transient response.
3. You m ust use both coils of a dual-
voice-coil woofer either in series or in
parallel.
J BL GT Series subwoofers are available
in three different configurations: single
4-ohm voice coil, single 8-ohm voice coil
and dual 4-ohm voice coils. Depending
on the am plifier you are using, you m ay
use either single- or dual-voice-coil
subwoofers in singles or m ultiples to
m axim ize the power available from your
am plifier. To achieve the m axim um
am plifier output possible, you should
design a speaker system that provides
the lowest im pedance that your am plifier
is rated to drive safely. When designing
a subwoofer system , abide by the
following rules:
+
coils (or woofers) in series = w1
2 + w3...
+
w
The diagram s below and at right show
parallel and series speaker connections.
Figure 1. Parallel connection
1. Don’t m ix different subwoofer or enclo-
sure types in the sam e system (use all
single-coil 4-ohm woofers, all single-
coil 8-ohm woofers, or all dual-coil
woofers).
4. Most am plifiers deliver exactly the
sam e am ount of power bridged into
a 4-ohm load as they do running a
2-ohm stereo load.
0 3
Specifications
GT1041
GT1041D
GT1081
GT1241
GT1241D
GT1281
Configuration
10" subwoofer
10" subwoofer
10" subwoofer
12" subwoofer
12" subwoofer
12" subwoofer
Recom m ended Am plifier
Pow er Range
18W – 275W
4 ohms
18W – 275W
dual 4 ohms
90dB
18W – 275W
8 ohms
18W – 300W
4 ohms
18W – 300W
dual 4 ohms
93dB
18W – 300W
8 ohms
Im pedance
Sensitivity
90dB
90dB
93dB
93dB
Frequency Response
Mounting Depth
20Hz – 500Hz
20Hz – 500Hz
20Hz – 500Hz
18Hz – 500Hz
6" (153m m )
18Hz – 500Hz
6" (153m m )
18Hz – 500Hz
6" (153m m )
5-3/8" (137m m )
9-1/4" (235m m )
5-3/8" (137m m )
9-1/4" (235m m )
5-3/8" (137m m )
9-1/4" (235m m )
Cut-Out Diam eter
11-1/8" (283m m )
11-1/8" (283m m )
11-1/8" (283m m )
Declaration of Conformity
We, JBL Europe A/S
Kongevejen 194B
DK-3460 Birkerod
DENMARK
declare in own responsibility, that the products
described in this owner’s manual are in compliance
with technical standards:
EN 50081-1:1992
EN 50082-1:1992
Steen Michaelsen
JBL Europe A/S
JBL Consumer Products, 250 Crossways Park Drive, Woodbury, NY 11797
800-336-4JBL (4525) www.jbl.com Part No. GTSUBOM Made in USA
Birkerod. DENMARK. 5/99
|
Intel Frozen Dessert Maker IXP400 User Manual
Invacare Personal Lift 5143 User Manual
JAI Security Camera CV A60 User Manual
Jenn Air Microwave Oven W10259841B User Manual
JVC Car Stereo System KW XR614 User Manual
Kenmore Dishwasher 6651327 User Manual
Kensington Video Game Keyboard K39561 User Manual
Kenwood Blender BL760 User Manual
Kettler Elliptical Trainer Mondeo User Manual
KitchenAid Range KGSK901 User Manual