JBL Grand Touring GT1041 Handleiding
Lees hieronder de š handleiding in het Nederlandse voor JBL Grand Touring GT1041 (4 pagina's) in de categorie Subwoofer. Deze handleiding was nuttig voor 6 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld
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Grand TouringĀ®Series
GT1041, GT1041 , GT1081, GT1241, GT1241 , GT1281D D
Ownerās Manual
A U T O M O T I V E S U B W O O F E R S
S E R I E S
Thank you for purchasing a new
JBL GT Series subwoofer. Subwoofer
installation often requires woodworking
skills and some experience disassem-
bling and reassembling automotive inte-
riors. If you lack the tools or necessary
skills, have your subwoofer installed by
an authorized JBL dealer.
Warning: Playing loud music in an auto-
mobile can permanently damage your
hearing as well as hinder your ability to
hear trafļ¬c. We recommend listening at
low levels while driving. JBL accepts no
liability for hearing loss, bodily injury or
property damage resulting from use or
misuse of this product.
construction is straightforward and there
are many prefabricated sealed enclo-
sures available. An optimum sealed
enclosure is always smaller than other
types of enclosures optimized for a par-
ticular speaker, so they require the small-
est amount of space inside the vehicle.
Vented enclosures provide better efļ¬-
ciency in the 40Hz ā 50Hz range, but this
efļ¬ciency comes at the expense of sound
in the lowest octave (below 40Hz), and at
the expense of some control and power
handling. If you are using a small
ampliļ¬er, a vented box will provide more
bass output from less power. Vented
enclosures are also well suited to a
variety of music types. Because vented
enclosures require the volume of the
enclosure and the size of the port to have
a speciļ¬c relationship with the character-
istics of the woofer, the enclosure must
be built exactly to the speciļ¬cations
provided. While there are some prefabri-
cated vented boxes available, matching a
prefabricated box to a particular woofer
is difļ¬cult. If you wish to use a vented
enclosure, we strongly recommend
having your authorized JBL dealer build
02
Choosing an Enclosure
GT Series subwoofers are optimized to
perform best in small sealed, vented
and prefabricated bandpass enclosures.
While inļ¬nite-bafļ¬e mounting of
GT Series subs is possible, power
handling is greatly compromised
because thereās no enclosed volume of
air to prevent the speakerās cone from
moving past its limit. For this reason,
we do not recommend inļ¬nite-bafļ¬e
mounting for GT Series subwoofers.
You should choose the enclosure you
will use based on the type of music you
listen to, how much ampliļ¬er power you
will use for the subwoofer and how
much space inside the vehicle you can
devote to a subwoofer enclosure.
Because a sealed enclosure provides the
most control over the wooferās move-
ment, a woofer mounted in a sealed
enclosure can handle more power than a
woofer mounted in another enclosure
type. Sealed enclosures provide more
accurate sonic reproduction than other
enclosure types, so they are well suited
to all types of music. Sealed-enclosure
it, or verify that your design is correct
if you wish to build it yourself. An
optimum vented enclosure is always
larger than the optimum sealed box for
the same woofer, and will require more
space inside the vehicle.
Bandpass enclosures often provide
the most output available from any
ampliļ¬er-and-subwoofer combination at
the expense of sonic accuracy. If sheer
SPL (sound-pressure level) is what you
desire most, choose a bandpass
enclosure. Bandpass-enclosure design
is very tricky; using a computer and
enclosure-design software is necessary.
If you are an experienced installer or
have some woodworking experience,
you may wish to build the enclosure
described in the
Speciļ¬cations
chart in
this manual. Fortunately, there are many
prefabricated bandpass boxes available,
and they are all optimized to extract the
most output possible from any woofer.
Bandpass enclosures can be quite large
and may require a lot of space inside
your vehicle.
03
Connecting Your Subwoofer to Your
Ampliļ¬er
JBL GT Series subwoofers are available
in three diīerent conļ¬gurations: single
4-ohm voice coil, single 8-ohm voice coil
and dual 4-ohm voice coils. Depending
on the ampliļ¬er you are using, you may
use either single- or dual-voice-coil
subwoofers in singles or multiples to
maximize the power available from your
ampliļ¬er. To achieve the maximum
ampliļ¬er output possible, you should
design a speaker system that provides
the lowest impedance that your ampliļ¬er
is rated to drive safely. When designing
a subwoofer system, abide by the
following rules:
1. Donāt mix diīerent subwoofer or enclo-
sure types in the same system (use all
single-coil 4-ohm woofers, all single-
coil 8-ohm woofers, or all dual-coil
woofers).
2. You may connect the coils of a dual-
voice-coil woofer in series, but NEVER
connect separate woofers in series.
Because the ampliļ¬er-damping factor
(the ampliļ¬erās ability to control the
motion of the woofer) is expressed as
a ratio of terminal impedance (the sum
of speaker impedance, wire resistance
and the D.C. resistance of any
crossover coil connected to the
woofer) to ampliļ¬er-output imped-
ance, connecting woofers in series
reduces the damping factor of the
ampliļ¬er to a value less than 1. This
will result in poor transient response.
3. You must use both coils of a dual-
voice-coil woofer either in series or in
parallel.
4. Most ampliļ¬ers deliver exactly the
same amount of power bridged into
a 4-ohm load as they do running a
2-ohm stereo load.
To design a subwoofer system that
maximizes available ampliļ¬er power,
keep the following rules in mind:
1. The total system impedance of
woofers in parallel = 1/(1/w1 + 1/w2 +
1/w3...) where w is the nominal imped-
ance of the woofer.
2. The total system impedance of voice
coils (or woofers) in series = w
1 +
w2 + w3...
The diagrams below and at right show
parallel and series speaker connections.
Figure 1. Parallel connection
Figure 2. Series connection
Product specificaties
| Merk: | JBL |
| Categorie: | Subwoofer |
| Model: | Grand Touring GT1041 |
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