JBL Power P1242 Handleiding
Lees hieronder de 📖 handleiding in het Nederlandse voor JBL Power P1242 (4 pagina's) in de categorie Subwoofer. Deze handleiding was nuttig voor 10 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld
Pagina 1/4
Automotive Subwoofers Owner’s Manual P1040 P1042 P1240 P1242
Thank you for purchasing a new
JBL GTp subwoofer. Subwoofer
installation requires woodworking
skills and some experience
disassembling and reassembling
automotive interiors. If you lack
the tools or necessary skills, have
your subwoofer installed by an
authorized JBL dealer.
Warning: Playing loud music in
an automobile can permanently
damage your hearing as well as
hinder your ability to hear traffic.
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.
GTp subwoofers are optimized
to perform best in small, sealed,
vented and prefabricated bandpass
enclosures. While infinite-baffle
mounting of GTp subs is possible,
power handling will be greatly
compromised because there’s no
enclosed volume of air to prevent
the speaker’s cone from moving
past its limit. For this reason, we
do not recommend infinite-baffle
mounting for GTp subwoofers.
You should choose the enclosure
you will use based on the type of
music you listen to, how much
amplifier 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
woofer’s movement, a woofer
mounted in a sealed enclosure will
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 construction
is straightforward and there are
many prefabricated sealed
enclosures available. An optimum
sealed enclosure is always smaller
than other types of enclosures
optimized for a particular speaker,
so they require the smallest amount
of space inside the vehicle.
Vented enclosures provide better
efficiency in the 40Hz – 50Hz range
but this efficiency 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
amplifier, 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
specific relationship with the
characteristics of the woofer, the
enclosure must be built exactly to
the specifications provided. While
there are some prefabricated
vented boxes available, matching a
prefabricated box to a particular
woofer is difficult. If you wish to use
a vented enclosure, we strongly
recommend having your authorized
JBL dealer build 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 amplifier 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 and the aid
of 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
enclosure design sheet included
with this woofer. 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.
02
Choosing an Enclosure JBL Pro Power GTp Series
03
JBL GTp subwoofers are available
in two different configurations:
single 4-ohm voice coil and dual
4-ohm voice coils. Depending on
the amplifier you are using, you
may use either single-voice-coil
or dual-voice-coil subwoofers in
singles or multiples to maximize
the power available from your
amplifier. To achieve the maximum
ampli er output possible, youfi
should design a speaker system
that provides the lowest impedance
that your ampli er is rated to fi
drive safely. When designing a
subwoofer system, consider the
following rules:
1. Don t mix different subwoofer ’
or enclosure types in the same
system (use all single-coil
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
amplifier-damping factor (the
ampli er s ability to control thefi ’
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 ampli er-outputfi
impedance, connecting separate
woofers in series reduces the
damping factor of the ampli er fi
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 connected
either in series or in parallel.
4. Most ampli ers deliver exactlyfi
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 amplifier
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 impedance of the
woofer.
2. The total system impedance
of voice coils (or woofers) in
series = w1+ w2+ w3...
The diagrams below and at right
show parallel and series speaker
connections.
Figure 1. Parallel connection
Figure 2. Series connection
POS ( + )
NEG ( – )
RED
STRIPE
POS ( + )
BLACK
STRIPE
NEG ( – )
POS ( + ) NEG ( )–
RED
STRIPE
POS ( + )
BLACK
STRIPE
NEG ( )–
Connecting Your Subwoofer to Your Amplifier JBL Pro Power GTp Series
Product specificaties
| Merk: | JBL |
| Categorie: | Subwoofer |
| Model: | Power P1242 |
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