Jbl Power Series Bpx1100 1 Users Manual Amp OM

BPx2200.1 to the manual fcd71777-484b-4b00-b6a8-fa625e210a24

2015-02-04

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car audio
power amplifier
owner’s manual
THANK YOU
for purchasing a JBL Power Series®amplifier.
In order that we may better serve you should you
require warranty service for your new amplifier, please
retain your original purchase receipt and return the
enclosed warranty registration card.
INSTALLATION
WARNING: Playing loud music
in an automobile can hinder your
ability to hear traffic and permanently
damage your hearing. We recommend
listening at low or moderate levels
while driving your car. JBL accepts
no liability for hearing loss, bodily
injury or property damage resulting
from the use or misuse of this product.
IMPORTANT: To get the best
performance from your JBL Power
Series®amplifiers, we strongly recom-
mend that installation be entrusted to
a qualified professional. Although
these instructions explain how to
install JBL Power Series amplifiers in
a general sense, they do not show
specific installation methods that may
be required for your particular vehicle.
If you do not have the necessary tools
or experience, do not attempt the
installation yourself. Instead, please
ask your authorized JBL car audio
dealer about professional installation.
INSTALLATION
WARNINGS AND TIPS
• Always wear protective eyewear
when using tools.
• Turn off all audio systems and other
electrical devices before you start.
Disconnect the (–) negative lead from
your vehicle’s battery.
• Check clearances on both sides of a
planned mounting surface before
drilling any holes or installing any
screws. Remember that the screws
can extend behind the surface.
• At the installation sites, locate and
make a note of all fuel lines,
hydraulic brake lines, vacuum lines,
and electrical wiring. Use extreme
caution when cutting or drilling in
and around these areas.
• Before drilling or cutting holes, use
a utility knife to remove unwanted
fabric or vinyl to keep material from
snagging in a drill bit.
•When routing cables, keep input-
signal cables away from power
cables and speaker wires.
• When making connections, make
certain they are secure and properly
insulated.
• If the amplifier’s fuse must be
replaced, use only the same type and
rating as that of the original. Do not
substitute another kind.
CHOOSING A LOCATION
AND MOUNTING THE
AMPLIFIER
Amplifiers need air to stay cool.
Suitable locations are under a seat
(provided the amplifier doesn’t
interfere with the seat adjustment
mechanism), in the trunk, or in any
other location which provides enough
air for the amp to cool itself. Do not
mount the amplifier with the heat sink
facing downward, as this makes
convection cooling of the amplifier
impossible.
Mount the amplifier so that it is not
damaged by the feet of backseat
passengers or shifting cargo in the
trunk. Mount the amplifier so that it
remains dry – never mount an amplifier
outside the car or in the engine
compartment. Using the amplifier as
a template, mark the location of the
mounting holes on the mounting
surface, drill pilot holes, and attach
the amplifier to the mounting surface
with screws. Make sure the amplifier
is mounted securely.
POWER CONNECTIONS
The Power Series amplifiers are
capable of delivering extremely high
power levels, and require a heavy-duty
and reliable connection to the vehicle’s
electrical system in order to perform
optimally. Please adhere to the
following instructions carefully:
Ground Connection
Connect the amplifier’s Ground (GND)
terminal to a solid point on the
vehicle’s metal chassis, as close to
the amplifier as possible. Refer to the
chart below to determine minimum
wire-gauge size. Scrape away any
paint from this location; use a star-type
lock washer to secure the connection.
Power Connection
Connect a wire (see chart at right for
appropriate gauge) directly to the
vehicle’s positive battery terminal,
and install an appropriate fuse holder
within 18" of the battery terminal. Do
not install the fuse at this time. Route
the wire to the amplifier’s location, and
connect it to the amplifier’s Positive
(BATT +) terminal. Be sure to use
appropriate grommets whenever
routing wires through the firewall
or other sheet metal. Failure to
adequately protect the positive wire
from potential damage may result in
a vehicle fire. When you are done
routing and connecting this wire, you
may install the fuse at the battery.
NOTE: The BPx2200.1 is supplied
with an external 150A fuse. If you
are running a dedicated wire to this
amplifier, this fuse should be installed
near the battery, as specified above. If
you are running multiple amplifiers off
a power distribution block, this fuse
should be installed between the
distribution block and the BPx2200.1.
In any case, a fuse must be installed
within 18" of the battery terminal.
Remote Connection
Connect the amplifier’s Remote (REM)
terminal to the source unit’s Remote
Turn-On lead using a minimum of
18-gauge wire.
Speaker Connections
Refer to the application guides on
the pages that follow. Speaker
connections should be made using
a minimum of 16-gauge wire.
Wire Gauge Chart
Amplifier Maximum Minimum
Model Current Draw Wire Gauge
Px300.4 78A #6 AWG
Px600.2 78A #6 AWG
BPx500.1 50A #8 AWG
BPx1100.1 110A #4 AWG
BPx2200.1 190A 2x #4 AWG
These recommendations assume
7' – 10' wire runs. If your installation
differs markedly, you will need to
adjust the wire gauge accordingly.
IMPORTANT NOTE: If you are planning
to use optional neon tubes, you
must install them before making any
electrical connections to the amplifier
(refer to “Installing Neon Tubes” on
page 7).
2
APPLICATIONS – BPx MODELS
To the right are several application
diagrams to help plan your subwoofer
system installation. Figures 1 through 3
show how to configure the JBL Power
Series subwoofer amplifiers (models
BPx500.1, BPx1100.1 and BPx2200.1)
for 2-channel, bridged-mono and
parallel-mono operation (also see
“Setting the Output Mode” on page 6).
NOTE: For simplicity, Figures 1 through
3 do not show power, remote and input
connections.
NOTE: If the nominal impedance
of your speaker system is close to
2 ohms, be prepared to try both
bridged and parallel configurations to
determine which performs better.
3
BPx Amplifier
(partial rear panel)
*
SEE MANUAL FOR PARALLEL CONNECTION
2CHANNEL
BRIDGED
PARALLEL
*
CH 1 CH 2
SPEAKER OUTPUTS
NEON
Subwoofer Subwoofer
Set OUTPUT MODE
to 2CH/BR
(on input panel)
PARALLEL 2CH/BR
OUTPUT MODE
See “Setting the Crossover(s)” on page 6 
to adjust X-OVER controls
(on input panel)
12dB 24dB
32Hz 320Hz
FREQ
SLOPE
X-OVER
BPx Amplifier
(partial rear panel)
*
SEE MANUAL FOR PARALLEL CONNECTION
2CHANNEL
BRIDGED
PARALLEL
*
CH 1
CH 2
SPEAKER OUTPUTS
NEON
Subwoofer (less than 2 ohms)
Set OUTPUT MODE
to PARALLEL
(on input panel)
PARALLEL 2CH/BR
OUTPUT MODE
See “Setting the Crossover(s)” on page 6 
to adjust X-OVER controls
(on input panel)
12dB 24dB
32Hz 320Hz
FREQ
SLOPE
X-OVER
jumper
Figure 1. The JBL Power Series
subwoofer amplifier is set to
2-channel mode to drive a pair
of subwoofers.
Figure 2. The JBL Power Series
subwoofer amplifier is set to
bridged (mono) mode to drive
a single subwoofer. Use this
mode only when the nominal
impedance of the speaker
system is 2 ohms or greater.
Figure 3. The JBL Power Series
subwoofer amplifier is set to
parallel mode to drive a single
subwoofer. Use this mode only
when the nominal impedance
of the speaker system is less
than 2 ohms.
NOTE: A jumper is added
between the + terminals.
BPx Amplifier
(partial rear panel)
*
SEE MANUAL FOR PARALLEL CONNECTION
2CHANNEL
BRIDGED
PARALLEL
*
CH 1 CH 2
SPEAKER OUTPUTS
NEON
Subwoofer (2 ohms or greater)
Set OUTPUT MODE
to 2CH/BR
(on input panel)
PARALLEL 2CH/BR
OUTPUT MODE
See “Setting the Crossover(s)” on page 6 
to adjust X-OVER controls
(on input panel)
12dB 24dB
32Hz 320Hz
FREQ
SLOPE
X-OVER
4
APPLICATIONS – Px600.2
The JBL Px600.2 amplifier can be
set up for stereo or bridged-mono
operation, as shown in Figures 4 and 5.
NOTE: For simplicity, Figures 4 and 5
do not show power, remote and input
connections.
Px600.2
(rear panel)
POWER FUSES
GND REM BATT
SPEAKER OUTPUTS
BRIDGED
STEREO
Px600.2
LR
NEON NEON
Subwoofer (4 ohms or greater)
Set MODE to LP;
INPUT MODE to MO
(on input panel)
X-OVER
ST
INPUT
MODE
MODE
SLOPE
MO
12dB 24dB
FLAT HP LP
32Hz 320Hz
FREQ
See “Setting the Crossover(s)”
on page 6 to set FREQ and SLOPE
For Stereo or Mono signals, use 
both L/R inputs
Px600.2
(rear panel)
POWER FUSES
GND REM BATT
SPEAKER OUTPUTS
BRIDGED
STEREO
Px600.2
LR
NEON NEON
R Speaker L Speaker
Set MODE to FLAT; 
INPUT MODE to ST
(on input panel)
X-OVER
ST
INPUT
MODE
MODE
SLOPE
MO
12dB 24dB
FLAT HP LP
32Hz 320Hz
FREQ
FREQ and SLOPE have no effect
Figure 4. The JBL Px600.2
amplifier is set to stereo mode
to drive a pair of full-range
speakers.
Figure 5. The JBL Px600.2
amplifier is set to bridged
(mono) mode to drive a single
subwoofer. Use this mode only
when the nominal impedance
of the subwoofer is 4 ohms
or greater.
5
APPLICATIONS – Px300.4
The JBL Px300.4 amplifier can be set
up for stereo or tri-mode operation, as
shown in Figures 6 and 7.
NOTE: For simplicity, Figures 6 and 7 do
not show power, remote and input
connections.
Px300.4
(rear panel)
POWER FUSES
GND REM BATT
Px300.4
SPEAKER OUTPUTS SPEAKER OUTPUTS
STEREO
REAR
FRONT
LRLR
BRIDGED
NEON NEON
-
+
+
-
LF
System
+
-
RF
System
Subwoofer
Set REAR
X-OVER MODE to LP
(on input panel)
FLAT HP LP
MODE
Set FRONT
X-OVER MODE to HP
(on input panel)
FLAT HP LP
MODE
Set FRONT
INPUT MODE to ST
(on input panel)
Set REAR 
INPUT MODE to MO
(on input panel)
ST
INPUT
MODE
MO
ST
INPUT
MODE
MO
See “Setting the Crossover(s)”
on page 6 to set FREQ and SLOPE
Px300.4
(rear panel)
POWER FUSES
GND REM BATT
Px300.4
SPEAKER OUTPUTS SPEAKER OUTPUTS
STEREO
REAR
FRONT
LRLR
BRIDGED
NEON NEON
+
-
+
-
LR Speaker
RR Speaker
RF Speaker
LF Speaker
+
-
+
-
Set REAR and FRONT
INPUT MODE to ST
(on input panel)
Set REAR and FRONT
X-OVER MODE to FLAT 
(on input panel)
FLAT HP LP
MODE
ST
INPUT
MODE
MO
Figure 6. The JBL Px300.4
amplifier is set to stereo mode
to drive front and rear pairs of
full-range speakers.
NOTE: To limit bass sent to
full-range speakers, set
X-OVER MODE to HP. See
page 6 to set FREQ and SLOPE.
Figure 7. The JBL Px300.4
amplifier is set to drive a stereo
component system and a
subwoofer with a nominal
impedance of 4 ohms or greater.
NOTE: To drive a pair of rear
midbass speakers (instead of
subwoofer), set INPUT MODE
to ST, X-OVER MODE to LP,
and use DBO to set HP filter.
6
INSTALLATION AND SETUP
SETTING THE
OUTPUT MODE
Setting an output mode depends on
your choice of system configuration
and the nominal impedace of your
speaker system. JBL Power Series BPx
amplifiers provide rated power into
any impedance between 1 and 4 ohms.
The BPx500.1, BPx1100.1 and BPx2200.1
amplifiers can be configured to provide
high voltage to loads of 2 ohms or
greater, or high current for loads below
2 ohms.
Using the Bridge Mode
If your speaker system has a nominal
impedance of 2 ohms or greater, bridge
the amplifier’s two channels to drive
the speaker(s). On BPx models, set the
OUTPUT MODE switch to 2CH/BR (see
Figure 2 on page 3).
Using the Parallel Mode
(BPx Models Only)
If the nominal speaker-system
impedance is less than 2 ohms,
connect the two amplifier channels
in parallel to drive the speaker(s),
as shown in Figure 3 on page 3.
On BPx models, set the OUTPUT MODE
switch to PARALLEL.
NOTE: If the nominal impedance of
your subwoofer system is close to
2 ohms, try both series and parallel to
determine which mode provides the
highest volume. Use the I/E OPT LED
according to “Setting Input Sensitivity”
on the right.
Using the 2-Channel Mode
With any Power Series amplifier, you
can also drive two woofers separately
by connecting the speakers in the
2-channel mode (see Figure 1 on page
3). In this mode, the minimum nominal
impedance is 2 ohms. On BPx models,
set the OUTPUT MODE switch to
2CH/BR.
SETTING THE
CROSSOVER(S)
IMPORTANT: If you plan to use the
Px300.4 or Px600.2 to drive full-range
speakers, set the X-OVER MODE
switch(es) to FLAT and skip to the next
section, “Setting Input Sensitivity.”
1. Initially set the X-OVER FREQ
control(s) midway. Later, when
listening to music (in the next
section), adjust them for least-
perceived distortion from midrange
and high-frequency speakers, while
allowing them to reproduce as much
bass as possible.
2. Depending on your system plan, set
the X-OVER MODE switch(es) to LP
(low-pass), HP (high-pass), or FLAT.
3. For HP filters, set the X-OVER SLOPE
switch(es) to 24dB to limit bass and
provide increased system volume
with less distortion.
For LP filters, use 12dB or 24dB
according to taste. However, using
a 24dB slope will make bass less
directional since midrange frequencies
are being filtered from the woofer’s
response. When choosing a low-pass
filter frequency for your subwoofers,
choose the highest frequency that will
remove vocal information from the
sound of the subwoofer.
SETTING DBO
(ALL MODELS
EXCEPT Px600.2)
Dynamic Bass Optimizer™(DBO) is
a new approach to enhancing low-
frequency reproduction in a vehicle.
Conventional bass boost controls add
bass at a fixed frequency and cause
the amplifier to consume considerable
power. DBO conserves valuable power
at the lowest frequencies and allows
you to adjust the level and “character”
of the bass sound, instead of just the
amount of boom.
Since a subwoofer in a vented box is
given to overexcursion below the
tuned frequency, set the HP FREQ
control 10Hz below the box’s resonant
(tuned) frequency (e.g., 30Hz for a
vented box tuned to 40Hz). Power
typically wasted in this region will
now be conserved and be available
for frequencies the enclosure will
reproduce. Use the BOOST
INSTALLATION AND SETUP control to
boost the bass at the set frequency by
as much as 12dB, as shown in Figure 8.
Figure 8. Frequency response curves
show typical DBO control ranges for
selected JBL Power Series amplifiers.
SETTING INPUT
SENSITIVITY
NOTE: For BPx models, you can use
the supplied REMOTE LEVEL CONTROL
instead of the amplifier’s INPUT LEVEL
control to set input sensitivity. Connect
the remote module’s attached cable to
the REMOTE LEVEL CONTROL (RJ-11)
jack on the amplifier’s input panel.
1. Initially, turn the INPUT LEVEL
control(s) to the minimum
(counterclockwise) position(s).
2. Reconnect the (–) negative lead to
your vehicle’s battery. Apply power
to the audio system and play a
dynamic music track from CD
or tape.
NOTE: After the source unit is on,
blue LEDs (on the top panel) will
illuminate, indicating the amplifier
is on. If not, check the wiring,
especially the remote connection
from the source unit. Also refer to
“Troubleshooting” on the next page.
3. On the source unit, increase the
volume control to maximum position.
Slowly increase the INPUT LEVEL
control(s) (clockwise) towards three
o’ clock and observe the I-E/OPT LED
(on the amplifier top). At the ideal
setting, it should flash on musical
peaks, signifying maximum voltage is
being delivered in the 2-channel or
bridge modes, or maximum current is
being delivered in the parallel mode.
If the I-E/OPT LED is on steadily, the
amplifier is being overdriven. Turn
the INPUT LEVEL control(s) back
slightly until the I-E/OPT LED flashes
on musical peaks.
-9
-6
-3
0
-12 20 80 Freq. (Hz)
dB
DBO HP FREQ Control
(adjusts cut-off
frequency)
-6
0
6
12
-12 20 80 Freq. (Hz)
dB
DBO BOOST Control
(adjusts boost amount
at cut-off frequency)
HP FREQ
100Hz20Hz
BOOST
MIN
-9
-6
-3
0
-12 20 80 Freq. (Hz)
dB
DBO HP FREQ Control
(adjusts cut-off
frequency)
-6
0
6
12
-12 20 80 Freq. (Hz)
dB
DBO BOOST Control
(adjusts boost amount
at cut-off frequency)
HP FREQ
100Hz20Hz
BOOST
MAX MIN
7
INSTALLATION AND SETUP
For sealed enclosures, use DBO to
enhance the middle of the bass region.
Set the HP FREQ control to 35Hz to
40Hz and adjust the BOOST control to
taste. This will make the bass sound
bigger and fuller. Alternatively, for
tighter-sounding bass, set the HP FREQ
control between 45Hz and 50Hz,
and also adjust the BOOST control
according to your preference.
For infinite-baffle applications, set the
HP FREQ control to the speaker’s FS
value (to keep the subwoofer from
trying to create bass below the
resonant frequency) and adjust the
BOOST control to taste.
INSTALLING NEON
TUBES (OPTIONAL)
1. Using a Phillips screwdriver, remove
all screws on the amplifier’s
output/power end panel and set
them aside.
2. Using a 3 ⁄32-inch Allen wrench,
remove only the screws on the
amplifier’s (top) clear cover and set
them aside.
3. Remove the end panel and slide the
cover off. Set both parts aside.
4. Locate the enclosed hardware bag
and remove the four clips. Each clip
has a square end and a larger round
end. Using a round end, press two
clips onto each neon tube (e.g.,
Street Glow AN9 or equivalent), as
shown in Figure 9 below.
5. For each tube, align both clips so the
square ends slide onto an exposed
extrusion edge, as shown in Figure 9.
Do not cover any screw holes. When
installed correctly, each neon tube
will sit under an extrusion and not be
visible when viewed from directly
above.
6. Route each neon tube’s power cable
through its respective NEON hole on
the end panel (see Figure 9).
7. Slide the cover back into place and
reinstall its screws. Then, replace
the end panel and reinstall its
screws.
8. Finish the installation of the neon
tubes as instructed in their owner’s
manual.
Figure 9.
Installing neon tubes in a JBL Px600.2 amplifier.
Installation is similar for other models.
TROUBLESHOOTING
SYMPTOM LIKELY CAUSE SOLUTION
No audio No voltage at BATT+ Check voltages at
(POWER LED or REM terminals, amplifier terminals
is off) or bad or no ground with VOM
connection
No audio DC voltage on Amplifier may need
(PROTECT LED amplifier output service; see enclosed
flashes every warranty card for
4 sec.) service information
No audio Amplifier is Make sure amplifier
(PROTECT overheated cooling is not blocked
LED is on) at mounting location;
verify speaker-system
impedance is within
specified limits (see
“Specifications” on the
next page)
No audio Voltage less than 9V on Check vehicle
(PROTECT BATT+ connection charging system for
and POWER defective voltage
LEDs flash) regulator
I-E/OPT LED Amplifier is being Check INPUT
is on all times overdriven LEVEL setting;
(not flashing) see previous page
No audio Voltage more than 16V Check vehicle
(PROTECT or less than 8.5V on charging system for
LED is on) BATT+ connection defective voltage
regulator
Distorted audio Input sensitivity is Check INPUT
not set properly, or LEVEL setting; or
amplifier or source check speaker wires
unit is defective for shorts or grounds
Distorted audio Short circuit in Remove speaker leads
and PROTECT speaker or wire one at a time to locate
LED flashes shorted speaker or
wire, then repair
Music lacks Speakers are not Check speaker
“punch” connected properly connections for
proper polarity
www.jbl.com
SPECIFICATIONS
Declaration of Conformity
We, Harman Consumer International
2, route de Tours
72500 Chateau du Loir
FRANCE
declare in own responsibility that the products
described in this owner’s manual are in compliance
with technical standards:
EN 55013:2001
EN 55020:2002
Emmanuel Millot
Harman Consumer
International
Chateau du Loir, France 7/04
*BPx500.1, BPx1100.1 and BPx2200.1 amplifiers are
performance-engineered by Crown.
JBL Consumer Products
250 Crossways Park Drive, Woodbury, NY 11797 USA
© 2004 Harman International Industries, Incorporated
JBL and Power Series are registered trademarks,
and Dynamic Bass Optimizer is a trademark, of
Harman International Industries, Incorporated.
Part No. PSAMPOM7/04
Px300.4
• 123.5W RMS x 4 channels at 4 ohms and <1% THD + N
• Signal-to-noise ratio: 76.64dBA (reference 1W into 4 ohms)
• 358W RMS x 2 channels at 4 ohms, 14.4V supply and
<1% THD + N
• 169W RMS x 4 channels at 2 ohms, 14.4V supply and
<1% THD + N
• Dynamic power: 385W at 4 ohms x 2 channels
• Effective damping factor: 6.383 at 4 ohms
• Frequency response: 16.6Hz – 500kHz (–3dB)
• Maximum input signal: 5.9V
• Maximum sensitivity: 250mV
• Output regulation: .39dB at 4 ohms
• Dimensions (L x W x H): 12-1/4" x 17" x 2-9/16"
Px600.2
• 180W RMS x 2 channels at 4 ohms and <1% THD + N
• Signal-to-noise ratio: 79.5dBA (reference 1W into 4 ohms)
• 663W RMS x 1 channel at 4 ohms, 14.4V supply and
<1% THD + N
• 290W RMS x 2 channels at 2 ohms, 14.4V supply and
<1% THD + N
• Dynamic power: 692W at 4 ohms x 1 channel
• Effective damping factor: 6.274 at 4 ohms
• Frequency response: 10Hz – 97.5kHz (–3dB)
• Maximum input signal: 5.95V
• Maximum sensitivity: 264mV
• Output regulation: .056dB at 4 ohms
• Dimensions (L x W x H): 12-1/4" x 17" x 2-9/16"
Px500.1
• 237W RMS x 2 channels at 4 ohms and <1% THD + N
• Signal-to-noise ratio: 66.4dBA (reference 1W into 4 ohms)
• 718W RMS x 1 channel at 4 ohms, 14.4V supply and
<1% THD + N
• 674W RMS x 1 channel at 1 ohm, 14.4V supply and
<1% THD + N
• Dynamic power: 790W at 4 ohms x 1 channel
• Effective damping factor: 6.187 at 4 ohms
• Frequency response: 25.4Hz – 340Hz (–3dB)
• Maximum input signal: 6.2V
• Maximum sensitivity: 280mV
• Output regulation: .28dB at 4 ohms
• Dimensions (L x W x H): 12-1/4" x 13" x 2-9/16"
BPx1100.1
• 334W RMS x 2 channels at 4 ohms and <1% THD + N
• Signal-to-noise ratio: 63dBA (reference 1W into 4 ohms)
• 1141W RMS x 1 channel at 4 ohms, 14.4V supply and
<1% THD + N
• 1022W RMS x 1 channel at 1 ohm, 14.4V supply and
<1% THD + N
• Dynamic power: 1312W at 4 ohms x 1 channel
• Effective damping factor: 6.179 at 4 ohms
• Frequency response: 21Hz – 320Hz (–3dB)
• Maximum input signal: 7V
• Maximum sensitivity: 264mV
• Output regulation: .25dB at 4 ohms
• Dimensions (L x W x H): 12-1/4" x 17" x 2-9/16"
BPx2200.1
• 650W RMS x 2 channels at 4 ohms and <1% THD + N
• Signal-to-noise ratio: 67dBA (reference 1W into 4 ohms)
• 2450W RMS x 1 channel at 4 ohms, 14.4V supply and
<1% THD + N
• 1810W RMS x 1 channel at 1 ohm, 14.4V supply and
<1% THD + N
• Dynamic power: 2940W at 4 ohms x 1 channel
• Effective damping factor: 6.28 at 4 ohms
• Frequency response: 22Hz – 302Hz (–3dB)
• Maximum input signal: 7V
• Maximum sensitivity: 250mV
• Output regulation: .12dB at 4 ohms
• Dimensions (L x W x H): 12-1/4" x 21-5/8" x 2-9/16"
Features, specifications and appearance
are subject to change without notice.

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