Read JBL P1520e (serv.man9) User Guide / Operation Manual online
Thank you for choosing a JBL POWER
subwoofer. POWER subwoofers are
designed to provide maximum sound output
in a variety of enclosure types while
maintaining the superb sound quality
associated with JBL. To ensure the best
subwoofer performance, we strongly
recommend that installation be entrusted to a
qualified professional. Although these
instructions explain how to install a POWER
subwoofer in a general sense, they don’t
show the specific installation procedures that
may be required for your particular vehicle. If
you feel you don’t have the necessary tools
or experience, don’t attempt the installation
yourself; rather, ask your authorized JBL
dealer about professional installation options.
subwoofer. POWER subwoofers are
designed to provide maximum sound output
in a variety of enclosure types while
maintaining the superb sound quality
associated with JBL. To ensure the best
subwoofer performance, we strongly
recommend that installation be entrusted to a
qualified professional. Although these
instructions explain how to install a POWER
subwoofer in a general sense, they don’t
show the specific installation procedures that
may be required for your particular vehicle. If
you feel you don’t have the necessary tools
or experience, don’t attempt the installation
yourself; rather, ask your authorized JBL
dealer about professional installation options.
Warning: Playing loud music in an
automobile can hinder your ability to hear
traffic, as well as permanently damage your
hearing. 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.
automobile can hinder your ability to hear
traffic, as well as permanently damage your
hearing. 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.
Your car and bass reproduction
Depending on the size of the vehicle’s
interior listening space, reproduced
frequencies below 80Hz may be boosted by
nearly 12dB per octave as frequency
decreases. This effect, commonly know as
transfer function or cabin gain, plays an
important role in defining the in-car
frequency response of your subwoofer.
Depending on the size of the vehicle’s
interior listening space, reproduced
frequencies below 80Hz may be boosted by
nearly 12dB per octave as frequency
decreases. This effect, commonly know as
transfer function or cabin gain, plays an
important role in defining the in-car
frequency response of your subwoofer.
Power handling Limitations
The power handling capacity of any
subwoofer is related to the excursion limit of
its suspension and its ability to dissipate heat.
A speaker reaches its excursion-limited
power-handling capacity when its suspension
is stretched to its limit.
Thermal power handling is determined by the
amount of heat that may be dissipated by the
driver’s voice coil. The power-handling rating
assigned to your POWER subwoofer is its
thermal-power-handling rating. This rating
assumes a clean (unclipped) signal. A clipped
waveform has much higher average power,
due to the longer duty cycle at the top and
bottom of the waveform; it will heat the
woofer’s voice coil faster than a clean signal
and may damage the voice coil. A square
wave has a 100% duty cycle and is
extremely dangerous for any speaker.
Audible distortion in the output of your
woofer is an indication that your amplifier
may be clipping, which could damage your
speakers over time.
The power handling capacity of any
subwoofer is related to the excursion limit of
its suspension and its ability to dissipate heat.
A speaker reaches its excursion-limited
power-handling capacity when its suspension
is stretched to its limit.
Thermal power handling is determined by the
amount of heat that may be dissipated by the
driver’s voice coil. The power-handling rating
assigned to your POWER subwoofer is its
thermal-power-handling rating. This rating
assumes a clean (unclipped) signal. A clipped
waveform has much higher average power,
due to the longer duty cycle at the top and
bottom of the waveform; it will heat the
woofer’s voice coil faster than a clean signal
and may damage the voice coil. A square
wave has a 100% duty cycle and is
extremely dangerous for any speaker.
Audible distortion in the output of your
woofer is an indication that your amplifier
may be clipping, which could damage your
speakers over time.
Choosing an enclosure
POWER subwoofers are optimized to
perform best in sealed and vented
enclosures. While infinite-baffle mounting of
POWER subs is possible, power handling will
be compromised since there will be no
enclosed volume of air to help the speaker’s
suspension control the motion of the
woofer’s cone. For this reason, we do not
recommend infinite-baffle mounting for high
power applications.
You should choose the enclosure you’ll use
based on the type of music you listen to, how
much amplifier power you’ll use to drive
subwoofer, and how much space inside the
vehicle you can devote to a subwoofer
enclosure.
POWER subwoofers are optimized to
perform best in sealed and vented
enclosures. While infinite-baffle mounting of
POWER subs is possible, power handling will
be compromised since there will be no
enclosed volume of air to help the speaker’s
suspension control the motion of the
woofer’s cone. For this reason, we do not
recommend infinite-baffle mounting for high
power applications.
You should choose the enclosure you’ll use
based on the type of music you listen to, how
much amplifier power you’ll use to drive
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 at low frequencies 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 type of
music. Sealed-enclosure construction is
straightforward. An optimum sealed
enclosure is always smaller than other types
of enclosure that are optimized for a
particular speaker, so they require the least
space inside the vehicle.
most control over the woofer’s movement, a
woofer mounted in a sealed enclosure will
handle more power at low frequencies 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 type of
music. Sealed-enclosure construction is
straightforward. An optimum sealed
enclosure is always smaller than other types
of enclosure that are optimized for a
particular speaker, so they require the least
space inside the vehicle.
02
The Official Brand of Live Music
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