4-449-052-13(1)
Getting Started
HOME AUDIO
SYSTEM
Disc/USB Playback
USB Transfer
Operating Instructions
Tuner
Bluetooth
Sound Adjustment
Other Operations
Additional Information
LBT-GPX77/GPX55
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9) Do not defeat the safety purpose of the
polarized or grounding-type plug. A
polarized plug has two blades with one
wider than the other. A grounding type
plug has two blades and a third
The following FCC
statement applies only to
the version of this model
manufactured for sale in
the U.S.A. Other versions
may not comply with FCC
technical regulations.
grounding prong. The wide blade or the
third prong are provided for your safety.
If the provided plug does not fit into your
outlet, consult an electrician for
NOTE:
replacement of the obsolete outlet.
10) Protect the power cord from being
walked on or pinched particularly at
plugs, convenience receptacles, and the
point where they exit from the apparatus.
11) Only use attachments/accessories
specified by the manufacturer.
This equipment has been tested and found to
comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide
reasonable protection against harmful
interference in a residential installation. This
equipment generates, uses and can radiate
radio frequency energy and, if not installed
and used in accordance with the instructions,
may cause harmful interference to radio
communications. However, there is no
guarantee that interference will not occur in
a particular installation. If this equipment
does cause harmful interference to radio or
television reception, which can be
determined by turning the equipment off and
on, the user is encouraged to try to correct the
interference by one or more of the following
measures:
– Reorient or relocate the receiving
antenna.
– Increase the separation between the
equipment and receiver.
– Connect the equipment into an outlet on a
circuit different from that to which the
receiver is connected.
– Consult the dealer or an experienced
radio/TV technician for help.
12) Use only with the cart, stand, tripod,
bracket, or table specified by the
manufacturer, or sold with the apparatus.
When a cart is used, use caution when
moving the cart/apparatus combination
to avoid injury from tip-over.
13) Unplug this apparatus during lightning
storms or when unused for long periods
of time.
14) Refer all servicing to qualified service
personnel. Servicing is required when
the apparatus has been damaged in any
way, such as power-supply cord or plug
is damaged, liquid has been spilled or
objects have fallen into the apparatus, the
apparatus has been exposed to rain or
moisture, does not operate normally, or
has been dropped.
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CAUTION
License and Trademark Notice
You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate
this equipment.
• “WALKMAN” and “WALKMAN” logo
are registered trademarks of Sony
Corporation.
• MPEG Layer-3 audio coding technology
and patents licensed from Fraunhofer IIS
and Thomson.
Properly shielded and grounded cables and
connectors must be used for connection to
host computers and/or peripherals in order to
meet FCC emission limits.
• Windows Media is either a registered
trademark or trademark of Microsoft
Corporation in the United States and/or
other countries.
Home Audio System
(LBT-GPX77/LBT-GPX55/
MHC-GPX88/MHC-GPX77/
MHC-GPX55/MHC-GPX33)
This equipment must not be co-located or
operated in conjunction with any other
antenna or transmitter.
• This product is protected by certain
intellectual property rights of Microsoft
Corporation. Use or distribution of such
technology outside of this product is
prohibited without a license from
Microsoft or an authorized Microsoft
subsidiary.
This equipment complies with FCC radiation
exposure limits set forth for an uncontrolled
environment and meets the FCC radio
frequency (RF) Exposure Guidelines in
Supplement C to OET65. This equipment
has very low levels of RF energy that it
deemed to comply without maximum
permissive exposure evaluation (MPE). But
it is desirable that it should be installed and
operated keeping the radiator at least 20 cm
or more away from person’s body (excluding
extremities: hands, wrists, feet and ankles).
®
• The Bluetooth word mark and logos are
registered trademarks owned by Bluetooth
SIG, Inc. and any use of such marks by
Sony Corporation is under license. Other
trademarks and trade names are those of
their respective owners.
• The N Mark is a trademark or registered
trademark of NFC Forum, Inc. in the
United States and in other countries.
• Android is a trademark of Google Inc.
For customers in Australia
• All other trademarks and registered
trademarks are of their respective holders.
In this manual, ™ and ® marks are not
specified.
Disposal of Old
Electrical &
Electronic
Equipment
(Applicable in the
EuropeanUnionand
other European
countries with
separate collection
systems)
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Table of Contents
Guide to parts and controls ..........6
Getting Started
Sound Adjustment
Creating your own sound
Hooking up the system
securely ......................................10
(DJ EFFECT) ............................ 28
Positioning the speakers.............12
Setting the clock.........................14
Other Operations
Singing along ............................ 28
Disc/USB Playback
Playing a disc .............................15
pattern and color........................ 29
Before using the USB device
with this system..........................15
Using the timers ........................ 29
Changing the display................. 30
Using optional equipment ......... 31
Playing a USB device ................16
Searching a track or audio file
(Track Search)............................16
Deactivating the buttons on the
unit (Child Lock)....................... 31
Using play mode ........................17
USB Transfer
Transferring music.....................18
Additional Information
Playable discs............................ 32
Websites for compatible
devices....................................... 32
Tuner
Listening to the radio .................21
Troubleshooting ........................ 33
Messages ................................... 37
Precautions................................ 38
Specifications............................ 40
Bluetooth
About the Bluetooth wireless
technology..................................22
Listening to music wirelessly on
a Bluetooth device......................22
Setting the Bluetooth audio
codecs.........................................26
In this manual, the MHC-GPX88 is
used for illustration purpose unless
stated otherwise.
Setting/Canceling Bluetooth
standby mode .............................26
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Guide to parts and controls
This manual mainly explains operations using the remote control, but the same operations
can also be performed using the buttons on the unit having the same or similar names.
Unit
D E F
G
C
B
H
A
S
I
J
K
J
L
M
R
N
N
F
Q
P
O
* MHC-GPX88 only.
Note
When pressing the buttons on the unit, press on the printings of the buttons.
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F
Remote control RM-AMU163
MUSIC, MOVIE/GAME, FOOTBALL
Select the preset sound effect (page 27).
T
A
N
FLANGER, ISOLATOR, SOUND
FLASH, PHASER (page 28)
Select the DJ EFFECT type.
FLANGER
ISOLATOR
SOUND
FLASH
PHASER
F
MOVIE
/
MUSIC
FOOTBALL
FUNCTION
GAME
Remote control: DJ CONTROL +/–
CD
USB
S
Adjust the DJ EFFECT level.
U
V
G
Z
G
Y
/
/
/
Select the menu items.
D
W
G
+/– (select folder)
Select a folder on an MP3 disc or a USB
device.
G
X
m/M (rewind/fast forward)
Hold down to find a point in a track or file
during playback.
J
./> (go back/go forward)
Select a track or file.
1
"/1 (on/standby)
TUNING +/–
Turn on the system, or set it to standby
mode.
Tune to the station you want.
Unit: ENTER
Remote control:
Enter the settings.
B
Remote control sensor
C
H
Disc tray
(N-Mark) (page 24)
Near Field Communication (NFC)
touchpoint indication.
D
Unit: MASTER VOLUME/DJ
CONTROL
I
Z OPEN/CLOSE
Insert or eject a disc.
Adjust the volume.
Adjust the DJ EFFECT level (page 28).
You cannot use this knob to adjust the
volume when the DJ EFFECT is
activated.
J
Unit: NX (play/pause)
Remote control: N (play)*,
X (pause)
Start or pause playback.
To resume playback, press NX or N.
Remote control: VOLUME +/–*
Adjust the volume.
E
Display panel
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x (stop)
R
BLUETOOTH (page 22)
Stop playback.
Press twice to cancel resume playback of
the USB device.
Press to select Bluetooth function.
Hold down to activate Bluetooth pairing
during Bluetooth function.
K
REC TO USB B
S
CD
Transfer onto the optional USB device
which is connected to the B port.
Select the CD function.
L
OPTIONS
Unit: USB/USB SELECT
Remote control: USB
Enter or exit options menu.
Select the USB function.
Select the USB device connected to the
A or B port during USB function.
M
BASS BAZUCA (page 27)
Select the BASS BAZUCA effect.
Unit: TUNER/BAND
Select the TUNER function.
Select the FM or AM band during
TUNER function.
N
LED PATTERN (page 29)
Change the illumination pattern on the
speakers (LBT-GPX77/MHC-GPX88/
GPX77 only) and the unit.
Unit: AUDIO IN
Select the TV/DVD/SAT or PC/GAME
function.
LED COLOR (page 29)
Remote control: FUNCTION
Select a function.
Change the illumination color on the
speakers (LBT-GPX77/MHC-GPX88/
GPX77 only) and the unit.
T
SLEEP (page 29)
Set the Sleep Timer.
O
B (REC/PLAY) (USB) port
Connect and transfer to an optional USB
device.
U
REPEAT/FM MODE
B indicator
Listen to a disc, a USB device, a single
track or file repeatedly (page 18).
Select the FM reception mode (monaural
or stereo) (page 21).
P
MIC jack
Connect a microphone.
V
DISPLAY
Change the information on the display
panel.
MIC LEVEL (MIN/MAX)
Adjust the microphone volume.
Q
A (PLAY) (USB) port
Connect an optional USB device.
W
SEARCH/TUNER MEMORY
Enter or exit search mode.
Preset the radio station (page 22).
A indicator
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X
CLEAR
Delete the last step from the program list.
Y
TIMER MENU (page 14, 29)
Set the clock and the timers.
Z
PLAY MODE/TUNING MODE
Select the play mode of an AUDIO CD,
MP3 disc or a USB device (page 17).
Select the tuning mode (page 21).
* The VOLUME + and N buttons have a
tactile dot. Use the tactile dot as a reference
when operating the system.
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Getting Started
Hooking up the system securely
1 To front speaker (right)
2 To front speaker (left)
3 To HIGH speaker (right)
4 To HIGH speaker (left)
5 To LOW speaker (right)
6 To LOW speaker (left)
7 To subwoofer (right)
8 To subwoofer (left)
9 To subwoofer
B is different
depending on the model.
See below.
MHC-GPX88
LBT-GPX77/MHC-GPX77
LBT-GPX55/MHC-GPX55
MHC-GPX33
1
2
3
4
1
2
1
2
7
8
5
6
9
1
2
7
8
1
2
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A Antennas
Find a location and an orientation that
provide good reception when you set up
the antennas.
Keep the antennas away from the speaker
cords, the power cord and the USB cable
to avoid picking up noise.
– LED SPEAKER terminals
(LBT-GPX77/MHC-GPX88/GPX77
only) Connect the LED SPEAKER
connector of the speaker to this
terminal.
The lighting on the speakers will react
according to the music source. You can
select the illumination pattern and color
according to your preference (page 29).
Example:
Extend the FM lead
antenna horizontally
AM loop antenna
C AUDIO IN jacks
Use an audio cord (not supplied) to
connect to the audio output jacks of the
following equipment. The sound is output
through this system.
B Speakers
(LBT-GPX77/MHC-GPX88/GPX77)
The speaker connectors are color-coded
with their respective speaker terminals on
the unit.
– TV/DVD/SAT R/L
Connect to a TV or an audio/video
equipment.
Example:
– PC/GAME R/L
Connect to a computer or gaming
device.
White
D Power
Plug the power cord into a wall socket.
The demonstration appears in the display
panel. Press "/1to turn on the system and
the demonstration automatically ends.
If the supplied adaptor on the plug does
not fit your wall outlet, detach it from the
plug (only for models equipped with an
adaptor).
Notes
• Be sure to use only the supplied speakers.
• When connecting speaker cords, insert the
connector straight into the terminals.
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– Subwoofer (MHC-GPX88 only)
Inserting batteries
Insert the two supplied R6 (size AA)
batteries, matching the polarities shown
below.
speakers
Notes
To obtain optimum performance from the
system, we recommend you to place the
speakers as shown below.
• Do not mix an old battery with a new one or
mix different types of batteries.
• If you do not use the remote control for a long
period of time, remove the batteries to avoid
damage from battery leakage and corrosion.
A Unit
B Front speaker (left)
C Front speaker (right)
D Subwoofer (left)
E Subwoofer (right)
F Subwoofer
Attaching the speaker pads
(LBT-GPX77/MHC-GPX88/GPX77
only)
G Spacer
MHC-GPX88 only
– Vertical positioning
The speaker pads are pre-installed in
vertical position to stabilize the speakers
and to prevent them from slipping.
If you want to place the speakers in
horizontal positioning (page 13), attach
the supplied speaker pads to the bottom of
the speakers as shown below.
SONY
emblem
SONY
emblem
D
A
E
B
C
– Front speaker
0.3 m (1 foot)
0.3 m (1 foot)
45
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– Horizontal positioning
LBT-GPX55/MHC-GPX55 only
B A
SONY
SONY
emblem
F
C
emblem
D A E
0.3 m (1 foot)
0.3 m (1 foot)
45
B
C
0.3 m (1 foot)
0.3 m (1 foot)
45
MHC-GPX33 only
A
B
C
0.3 m (1 foot)
0.3 m (1 foot)
45
LBT-GPX77/MHC-GPX77 only
– Vertical positioning
SONY emblem
A
B
C
Line Array Speaker System
(MHC-GPX88 only)
0.3 m (1 foot)
0.3 m (1 foot)
45
To create a party environment, we
recommend you to install your speakers
using Line Array Speaker System. It
provides a wide sound space for a large
room like a hall.
– Horizontal positioning
– Positioning
SONY emblem
SONY
emblem
SONY
emblem
A
B
0.3 m (1 foot)
C
0.3 m (1 foot)
B
C
45
A
G
D
G
E
0.3 m (1 foot)
0.3 m (1 foot)
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– Installing
Turning the SONY emblem
(LBT-GPX77/MHC-GPX88/GPX77
only)
1 Insert the pins of the spacer
(supplied) to the catcher holes on
top of the subwoofer.
– Horizontal positioning
Pin
After positioning the speakers, turn the
SONY emblem on the front speakers and
subwoofers to horizontal position.
Spacer
Catcher hole
Subwoofer
SONY
emblem
2 Stack the front right speaker on top
of the subwoofer. Make sure the
catcher holes of the front right
speaker is inserted to the pins of the
spacer.
Front right
speaker
Setting the clock
You cannot set the clock in Power Saving
Mode.
Catcher
hole
Spacer
1
2
Press "/1 to turn on the system.
Pin
Subwoofer
Press TIMER MENU.
If “PLAY SET” appears in the display
3 Repeat steps 1 and 2 to install
another subwoofer and front left
speaker.
panel, press
/
repeatedly to
select “CLOCK SET”, then press
.
3
4
Press
hour, then press
/
repeatedly to set the
.
Press repeatedly to set the
minutes, then press
/
.
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Disc/USB Playback
Before using the USB
device with this system
Playing a disc
Check the websites for the information
about compatible USB devices (page 32).
1
2
Press CD.
Press Z OPEN/CLOSE on the
unit.
To select the playback source or
transferring destination (USB
memory select)
If the USB device has more than one
memory (for example, internal memory
and a memory card), you can select which
memory to use as a playback source or
transferring destination.
3
Load a disc with the label side
facing up on the disc tray.
When you play
back an 8 cm
disc such as a
CD single, place
it on the inner
circle of the tray
Use the buttons on the unit to perform this
operation.
Note
You cannot select a memory during playback or
transfer. Make sure to select a memory before
starting playback or transfer.
4
Press Z OPEN/CLOSE on the
unit to close the disc tray.
Do not forcibly push the disc tray to
close it as this may cause a
malfunction.
1 Connect the USB device to the
A
or B port.
5
Press N to start playback.
2 Press USB/USB SELECT
repeatedly until “USB A” or “USB B”
lights up in the display panel.
3 Press OPTIONS when playback is
stopped.
4 Press
/
to select “USB MEM
SEL”, then press ENTER.
5 Press
/
to select the memory
you want, then press ENTER.
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Playing a USB device
Searching a track or
The audio formats that can be played back
by this system are as follows:
– MP3: file extension “.mp3”
– WMA: file extension “.wma”
– AAC: file extension “.m4a”, “.mp4” or
“.3gp”
audio file
(Track Search)
1
Press SEARCH.
“SEARCH” lights up in the display
2 panel.
(Audio files only)
If the audio files have the above file
extension but are not the respective
formats, the system may produce noise or
may malfunction.
Press
/
to select the folder
or N.
you want, then press
3
Press to select the track or
audio file you want, then press
/
1
2
Press USB repeatedly until
“USB A” or “USB B” lights up in
the display panel.
or N.
The selected track or audio file starts
playback.
Connect a USB device to the
or B port.
A
Notes on disc
• (For AUDIO CD) This system can recognize
up to 99 tracks.
• (For MP3 dics) This system can recognize up
to
– 999 folders (including root folder).
– 999 MP3 files.
– 250 MP3 files in a folder.
USB device
– 8 folders levels (tree structure of files).
• CD-TEXT information is not supported.
3
Press N.
Notes on USB device
The audio files are played back in
different orders depending on the play
mode.
• This system can recognize up to
– 250 audio files in a folder.
– 3,000 audio files in a USB device.
– 1,000 folders in a USB device (including
root folder).
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Creating your own program
(Program Play)
Using play mode
You can make a program of up to 25 steps
in the order you want them to be played
back.
Playing in original order
(Normal Play)
Press PLAY MODE repeatedly when
playback is stopped.
1
For CD function:
Press CD to select CD function.
When playing a disc
• (blank): play a disc
• FLDR*: play all audio files in the folder
on the disc
* When playing an AUDIO CD, “FLDR”
performs the same operation as “(blank)” play
mode.
For USB function:
Press USB repeatedly to select the
USB device you want.
2
3
When playback is stopped,
press PLAY MODE repeatedly
until “PGM” lights up in the
display panel.
When playing a USB device
• ALL USB: play all USB devices
• 1 USB: play a USB device
• FLDR: play all audio files in the folder
on the USB device
(Audio files only)
Press
+/– repeatedly to select
a folder.
If you want to program all files in the
.
Playing in random order
(Shuffle Play)
4 folder, press
Press ./> repeatedly to
select the track or audio file you
Press PLAY MODE repeatedly when
playback is stopped.
want, then press
.
When playing a disc
• SHUF: shuffle a disc
• FLDR SHUF*: shuffle all audio files in
the folder on the disc
Total playing time of
program (including
selected track or file)
Selected track
or file number
* When playing an AUDIO CD, “FLDR
SHUF” performs the same operation as
“SHUF” play mode.
When playing a USB device
• ALL USB SHUF: shuffle all USB
devices
• 1 USB SHUF: shuffle a USB device
• FLDR SHUF: shuffle all audio files in
the folder on the USB device
“--.--” appears when the total playing
time exceeds 100 minutes for an
AUDIO CD or when you program an
audio file.
Note
5
6
Repeat steps 3 to 4 to program
additional tracks or audio files.
When you turn off the system, the selected
Shuffle Play is cleared and the play mode
returns to Normal Play.
Press N to start Program Play.
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To cancel Program Play
When playback is stopped, press PLAY
MODE repeatedly until “PGM” disappear
from the display panel.
USB Transfer
Transferring music
You can transfer music from a sound
source to a USB device connected to the
B port.
To delete the last step from the
program list
Press CLEAR when playback is stopped.
The audio format of files transferred by
this system is MP3. However, you can
also transfer WMA and AAC files from
USB A.
Notes
• (CD function only) The program list remains
available until you open the disc tray.
• (USB function only) The program list is
cleared when you:
– perform the erase operation.
– remove the USB device.
Notes
• Do not remove the USB device during
transfer or erase operations. Doing so may
corrupt the data on the USB device or damage
the USB device itself.
– switch the USB memory select.
Playing repeatedly (Repeat
Play)
• MP3/WMA/AAC files are transferred with
the same bit rate as the original files.
• When transferring from an AUDIO CD,
TUNER, TV/DVD/SAT or PC/GAME
function, you may select the bit rate before
transferring.
Press REPEAT repeatedly.
: repeat all tracks or audio files on a
folder/disc/USB device
•
• USB transfer and erase operations are
disabled while the disc tray is open.
•
: repeat a track or audio file
Notes on the USB device
Note on copyright-protected
content
The transferred music is limited to private
use only. Use of the music beyond this
limit requires permission of the copyright
holders.
• The playback order for the system may differ
from the playback order of the connected
digital music player.
• You cannot erase audio files and folders in
Shuffle Play or Program Play.
To select the playback source or
transferring destination (USB
memory select)
See page 15.
To select the bit rate
You can select a higher bit rate to transfer
music with better quality.
Use the buttons on the unit to perform this
operation.
1 Press OPTIONS.
2 Press
/
repeatedly to select
“REC BIT RATE”, then press
ENTER.
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3 Press
/
repeatedly to select the
3
For Synchronized transfer:
bit rate you want, then press
ENTER.
When playback is stopped, press
PLAY MODE on the remote control
repeatedly to select the play mode you
want.
• 128 kbps: encoded MP3 tracks have
smaller file size and lower audio
quality.
• 256 kbps: encoded MP3 tracks have
bigger file size but higher audio
quality.
Notes
• If you start transferring in Shuffle Play
(“FLDR SHUF”), the selected play mode
changes to “FLDR” automatically.
• If you start transferring in Shuffle Play
(except “FLDR SHUF”), Repeat Play or
Program Play with no steps, the selected
play mode changes to Normal Play
automatically.
Transferring music from a disc
or USB device
You can easily transfer all the music on a
disc or USB A to USB B (Synchronized
Transfer). You can also transfer a single
track or audio file during playback
(REC1 Transfer).
For REC1 transfer:
Select the track or audio file you want
4 to transfer then start playback.
Press REC TO USB B.
Use the buttons on the unit to perform this
operation.
“PUSH ENTER” appears in the
5 display panel.
Press ENTER.
1
Connect a transferable USB
device to the B port as shown
below.
The transfer starts when “DON’T
REMOVE” appears in the display
panel.
For Synchronized transfer:
When the transfer is completed, the
transfer source and the USB device
stop automatically.
USB device
For REC1 transfer:
When the transfer is completed, the
disc or the USB device continues to
play.
2
For disc:
Press CD and then load the disc.
For USB:
Press USB/USB SELECT repeatedly
to select “USB A” and then connect a
USB device you want to transfer to
A port.
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Transferring analog audio
(Analog Transfer)
Erasing audio files or folders
from the USB device
You can transfer sound from an analog
audio source (other than CD, USB or
Bluetooth function) to a USB device.
Use the buttons on the unit to perform this
operation.
Use the buttons on the unit to perform this
operation.
1
2
Connect a USB device to the
or B port.
A
Press USB/USB SELECT
repeatedly until “USB A” or
1
2
Connect a transferable USB
device to the B port (page 19).
“USB B” lights up in the display
panel when playback is stopped.
Press TUNER/BAND or AUDIO IN
repeatedly to select the source
you want to transfer.
3
Press ./> or
repeatedly to select the audio
file or folder.
+/–
3
Press REC TO USB B.
“PUSH ENTER” appears in the
4
5
Press OPTIONS.
4 display panel.
Press ENTER.
Press
/
to select “USB
ERASE”, then press ENTER.
The transfer starts when “DON’T
REMOVE” appears in the display
panel.
“FOLDER ERASE” or “TRACK
ERASE” appears in the display panel.
6
Press ENTER.
5
Start playback the source.
“COMPLETE” appears in the display
panel.
To stop transferring
Press x.
Folder and file generation
rules
To create a new MP3 file
Press REC TO USB B during Analog
Transfer.
When first transferring to a USB device, a
“MUSIC” folder is created directly below
the “ROOT” and a transfer mode-oriented
folder is created within the “MUSIC”
folder. Folders and files are generated
within any of the transfer mode-oriented
folders as follows.
“NEW TRACK” appears in the display
panel.
A new MP3 is also created automatically
after approximately 1 hour of transfer.
Notes
• When a new MP3 file is created, transfer is
disabled for the time being.
• If you press REC TO USB B again after a few
seconds, a new MP3 file can be created.
Synchronized Transfer
Source
Folder name
File name
Audio files Same as the source
AUDIO CD “CDDA0001”* “TRACK001”*
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REC1 Transfer
Tuner
Source
Folder name
File name
Audio files “REC1-MP3”
Same as the
source
Listening to the radio
AUDIO CD “REC1-CD”
“TRACK001”*
1
2
Press FUNCTION repeatedly to
select FM or AM band.
Analog Transfer
Source
FM
Folder name
File name
For automatic scanning:
“TUFM0001”* “TRACK001”*
“TUAM0001”*
Press TUNING MODE repeatedly
until “AUTO” lights up in the display
panel. Then, press TUNING +/–.
Scanning stops automatically when a
station is tuned in. Then “TUNED”
and “ST” (for FM stereo programs
only) light up in the display panel.
If “TUNED” does not light up and
scanning does not stop, press xto stop
scanning. Then, perform manual
tuning (below).
When you tune to an FM station that
provides RDS services, information
such as the service name or station
name is provided by broadcasts.
You can check the RDS information
by pressing DISPLAY repeatedly.
AM
TV/DVD/
SAT
“EXTD0001”*
PC/GAME
“EXPG0001”*
* Folder and file numbers are assigned serially
thereafter.
Notes on transferring
• While transferring from an MP3 disc, AUDIO
CD or USB device, no sound is output.
• CD-TEXT information is not transferred in
the created MP3 files.
• The transfer stops automatically if:
– the USB device runs out of space during
transfer.
– the number of audio files and folders on the
USB device reaches the limit for the number
that the system can recognize.
• If a folder or file that you are trying to transfer
already exists on the USB device with the
same name, a sequential number is added after
the name without overwriting the original
folder or file.
For manual tuning:
Press TUNING MODE repeatedly
until “AUTO” and “PRESET”
disappear from the display panel.
Then, press TUNING +/– repeatedly to
tune to the station you want.
• You cannot perform the following operations
during transfer:
– Eject the disc.
– Select another track or file.
Tip
To reduce static noise on a weak FM stereo
station, press FM MODE repeatedly until
“MONO” lights up in the display panel.
– Pause playback or find a point in the track or
file.
– Change the function or tuner band.
®
• When transferring music to a Walkman
using “Media Manager for WALKMAN”, be
sure to transfer in MP3 format.
®
• When connecting a Walkman to the system,
be sure to connect after the display “Creating
Library” or “Creating Database” on the
®
Walkman has disappeared.
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To change the AM tuning interval
(Except for Saudi Arabian model)
Bluetooth
The default setting for AM tuning interval
is 9 kHz (or 10 kHz for some areas). You
cannot change the AM tuning interval in
Power Saving Mode.
Use the buttons on the unit to perform this
operation.
About the Bluetooth
wireless technology
Bluetooth wireless technology is a short-
range wireless technology that enables
wireless data communication between
digital devices. Bluetooth wireless
technology operates within a range of
about 10 meters (33 feet).
1 Press TUNER/BAND repeatedly to
select AM band.
2 Press "/1 to turn off the system.
3 While holding down ENTER, press
"/1.
Supported Bluetooth version,
profiles and codecs
Supported Bluetooth version:
• Bluetooth Standard version 3.0 + EDR
(Enhanced Data Rate)
“AM 9K STEP” or “AM 10K STEP”
appears in the display panel.
When you change the interval, all the
AM preset stations are erased.
Supported Bluetooth profiles:
• A2DP (Advanced Audio Distribution
Profile)
• AVRCP 1.3 (Audio Video Remote
Control Profile)
Presetting radio stations
You can store up to 20 FM and 10 AM
stations as your favorite stations.
Supported Bluetooth codecs:
• SBC (Sub Band Codec)
• AAC (Advanced Audio Coding)
1
2
Tune to the station you want.
Press TUNER MEMORY.
Preset number
Listening to music
wirelessly on a
Bluetooth device
You can listen to music from your
Bluetooth device over a wireless
connection.
3
Press TUNING +/– repeatedly to
select the preset number you
want, then press
.
Check the websites for the information
about compatible Bluetooth devices
(page 32).
“COMPLETE” appears in the display
panel. The station is stored.
To tune to a preset station
Press TUNING MODE repeatedly until
“PRESET” lights up in the display panel.
Then, press TUNING +/– repeatedly to
select the preset number you want.
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4
5
Perform the pairing procedure
on the Bluetooth device.
About the BLUETOOTH
indicator
For details, refer to the operating
instructions of your Bluetooth device.
The BLUETOOTH indicator lights up or
flashes in blue to show the Bluetooth
status.
Select the model number of the
unit on the display of the
Bluetooth device.
System status
Bluetooth standby
Bluetooth pairing
Indicator status
Flashes slowly
Flashes quickly
For example, select “SONY
MHC-GPX88” (or LBT-GPX77/
GPX55/MHC-GPX77/GPX55/
GPX33).
Bluetooth connecting Flashes
If passkey is required on the Bluetooth
device, enter “0000”.
Bluetooth connection Lights up
is established
6
Perform the Bluetooth
connection on the Bluetooth
device.
Pairing this system with a
Bluetooth device
When pairing is completed and the
Bluetooth connection is established,
Bluetooth device name appears in the
display panel.
Depending on the Bluetooth device,
connection may start automatically
after pairing is completed.
You can check the Bluetooth device
address by pressing DISPLAY
repeatedly.
Pairing is an operation where Bluetooth
devices register with each other
beforehand. Once a pairing operation is
performed, it does not need to be
performed again. If your device is an
NFC-compatible smartphone, the manual
pairing procedure is not necessary.
1
2
Place the Bluetooth device
within 1 meter (3 feet) from the
system.
Notes
• You can pair up to 9 Bluetooth devices. If the
10th Bluetooth device is paired, the least
recently connected device will be replaced by
the new one.
• “Passkey” may be called “Passcode”, “PIN
code”, “PIN number” or “Password”, etc.,
depending on the device.
Press BLUETOOTH on the unit
to select Bluetooth function.
“BLUETOOTH” appears in the
display panel.
• The pairing standby status of the system is
canceled after about 5 minutes. If pairing is
not successful, repeat from step 1.
• While connected to a Bluetooth device, this
system cannot be detected and connection
cannot be established from another Bluetooth
device which is never paired before.
• If you want to pair with another Bluetooth
device, repeat steps 1 to 6.
Note
If the system is connected to a Bluetooth
device, press BLUETOOTH to disconnect
3 the Bluetooth device.
Hold down BLUETOOTH on the
unit for 2 seconds or more.
“PAIRING” flashes in the display
panel.
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Notes
To cancel pairing operation
Hold down BLUETOOTH on the unit for
2 seconds or more until “BLUETOOTH”
appears in the display panel.
•
The app may not be available in some
countries/regions.
•
Depending on your smartphone, you can
use the NFC function without installing
the app. In this case, the operations and
specifications may be different. For
details, refer to the operating instructions
of your smartphone.
Connecting with a smartphone
by one touch (NFC)
By touching the system with an NFC-
compatible smartphone, the system is
turned on in Bluetooth function
automatically, and then proceeds to
complete pairing and the Bluetooth
connection automatically.
Compatible smartphones
Smartphones with a built-in NFC
function (OS: Android 2.3.3 or later,
excluding Android 3.x)
2
3
Start the app “NFC Easy
Connect” on the smartphone.
What is “NFC”?
NFC (Near Field Communication) is a
technology enabling short-range wireless
communication between various devices,
such as mobile phones and IC tags.
Thanks to the NFC function, data
Make sure that the application screen
is displayed.
Touch the smartphone to the
N-Mark on the system until the
smartphone vibrates.
communication can be achieved easily
just by touching the designated touchpoint
on the NFC-compatible devices.
1
Download and install the app
“NFC Easy Connect”.
Download the free Android app from
Google Play by searching for “NFC
Easy Connect” or access it by using the
two-dimensional code below. Data
communication fees may be charged.
Complete the connection by following
the instructions displayed on the
smartphone.
When the Bluetooth connection is
established, the BLUETOOTH
indicator stops flashing and remains
light up. Bluetooth device name
appears in the display panel.
Two-dimensional code* for
direct access
* Use a two-dimensional code reader app.
You can switch the sound source from
the smartphone to another NFC-
compatible Bluetooth device.
For details, refer to the operating
instructions of your Bluetooth device.
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Tip
Notes
If pairing and the Bluetooth connection fail, do
the following.
– Relaunch “NFC Easy Connect” and move the
smartphone slowly over the N-Mark.
– Remove the case from the smartphone if using
a commercially available smartphone case.
• When the system is not connected to any
Bluetooth device, the system will connect and
playback from the last connected Bluetooth
device automatically when you press N.
• If you try to connect another Bluetooth device
to the system, the current connected Bluetooth
device will be disconnected.
Playing music from a
Bluetooth device
x For an NFC-compatible
smartphone
Touch the smartphone to the N-Mark on
the system to establish the Bluetooth
connection.
Start playback of an audio source on the
smartphone. For details on playback, refer
to the operating instructions of your
smartphone.
You can operate a Bluetooth device by
connecting the system and a Bluetooth
device using AVRCP.
Check the following before playing
music:
– The Bluetooth function of the Bluetooth
device is turned on.
– Pairing has been completed.
To disconnect the Bluetooth device
x For a Bluetooth device
x For a Bluetooth device
Press BLUETOOTH on the unit.
“BLUETOOTH” appears in the display
panel.
1
Press BLUETOOTH on the unit
to select Bluetooth function.
Depending on the Bluetooth device, the
Bluetooth connection may be canceled
automatically when you stop playback.
“BLUETOOTH” appears in the
display panel.
2
Establish connection with the
Bluetooth device.
x For an NFC-compatible
smartphone
Touch the smartphone to the N-Mark on
The last connected Bluetooth device
will be connected automatically.
Perform the Bluetooth connection
from the Bluetooth device if the device
is not connected.
Once the connection is established, the
Bluetooth device name appears in the
display panel.
the system again.
Erasing all the pairing
registration information
Use the buttons on the unit to perform this
operation.
3
Press N.
Depending on the Bluetooth device,
– you may have to press N twice.
– you may need to start playback of an
audio source on the Bluetooth
device.
1
Press BLUETOOTH to select
Bluetooth function.
“BLUETOOTH” appears in the
display panel.
If the system is connected to a
Bluetooth device, the Bluetooth device
name appears in the display panel.
Press BLUETOOTH to disconnect the
Bluetooth device.
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2
Hold down ENTER and PHASER
for about 3 seconds.
Setting/Canceling
Bluetooth standby
mode
“PAIR HISTORY” and “CLEAR”
appear in the display panel and all the
pairing information is erased.
The system goes into Bluetooth standby
mode and waits for a Bluetooth
connection, even when the system is
turned off.
Setting the Bluetooth
audio codecs
1
2
Press OPTIONS on the unit.
Press repeatedly to select
“BT STANDBY”, then press
Press repeatedly to select
You can select the Bluetooth audio codecs
when the connected Bluetooth device
supports Advanced Audio Coding
(AAC).
/
.
3
/
1
2
Press OPTIONS on the unit.
Press repeatedly to select
“BT AAC”, then press
Press repeatedly to select
“STANDBY ON” or “STANDBY
OFF”.
/
.
4
Press ?/1 to turn off the system.
When Bluetooth standby mode is set to
on, the system will turn on
3
/
“BT AAC ON” or “BT AAC OFF”.
automatically when you establish the
Bluetooth connection from the
Bluetooth device.
• BT AAC ON: Advanced Audio
Coding (AAC) is selected if the
Bluetooth device supports AAC.
• BT AAC OFF: Sub Band Codec
(SBC) is selected.
Note
The system will not enter Bluetooth standby
mode if you erase the pairing information.
Notes
• You can enjoy high quality sound if the AAC
is selected. In case you cannot listen to AAC
sound from your device, select “BT AAC
OFF”.
• If you change this setting while the system is
connected to a Bluetooth device, the
Bluetooth device will be disconnected. To
connect to the Bluetooth device, perform the
Bluetooth connection again.
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Sound Adjustment
Creating your own
sound effect
You can raise or lower the levels of
specific frequency bands and then store
the setting in the memory as “USER EQ”.
Adjusting the sound
To
Do this
Reinforce the
Press BASS BAZUCA on
bass and create the unit.
a more powerful
sound
1
2
Press OPTIONS on the unit.
Press repeatedly to select
“EQ EDIT”, then press
Press repeatedly to adjust
/
Select a preset Press MUSIC, MOVIE/
.
sound effect
GAME or FOOTBALL.
To cancel preset sound
effect, press MUSIC
repeatedly to select
“FLAT”.
3
/
the equalizer level, then press
.
Frequency band
Equalizer level
To adjust the subwoofer level
(LBT-GPX55/MHC-GPX88/GPX55
only)
1 Press OPTIONS on the unit.
4
Repeat step 3 to adjust the level
of other frequency bands and
surround effect.
2 Press
/
repeatedly to select
“SUBWOOFER”, then press
.
3 Press repeatedly to select the
/
The user equalizer setting is stored
when “USER EQ” appears in the
display panel.
subwoofer level, then press
.
To exit the OPTIONS menu, press
OPTIONS on the unit.
To bring up the user equalizer
setting
Press MUSIC repeatedly to select “USER
EQ”.
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Other Operations
Creating a party
atmosphere
Singing along
(DJ EFFECT)
(MHC-GPX88 only)
1
Press the following button to
select the effect type.
You can sing along with any audio source
that played back on this system.
The selected button lights up and the
effect is activated.
• FLANGER: Create a deep flanging
effect that is similar to the roar of a
jet plane.
• ISOLATOR: Isolate a specific
frequency band by adjusting the
other frequency bands. For example,
when you want to focus on vocal and
etc.
• SOUND FLASH: Flash the sound
output. The sound cuts off
periodically.
1
TurnMICLEVELtoMINtoreduce
2 the microphone volume level.
Connect a microphone to the
3 MIC jack on the unit.
Start playing the music and
4 adjust the volume.
Turn MIC LEVEL to adjust the
microphone volume.
If acoustic feedback (howling) occurs,
reduce the volume, move the
microphone away from the speakers,
or change the direction of the
microphone.
After you have finished, disconnect the
microphone.
• PHASER: Create a series of peaks
and troughs in the frequency
spectrum, like a sweeping effect.
2
Press DJ CONTROL +/– to adjust
the effect level.
Note
The sound from the microphone will not be
transferred onto the USB device during USB
transferring.
To turn off the effect
Press the selected effect button again.
Notes
• The DJ EFFECT is automatically turned off
when you turn off the system or change the
function or tuner band.
• If you activate the DJ EFFECT during
transfer, the sound effect will not be
transferred onto the USB device.
• You cannot use MASTER VOLUME/
DJ CONTROL on the unit to adjust the
volume when the DJ EFFECT is activated.
Press VOLUME +/– on the remote control to
adjust the volume.
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Sleep Timer
Changing the
illumination pattern
and color
You can fall asleep when listening to
music. The system turns off after the
preset time.
Press LED PATTERN or LED
COLOR to select the illumination
pattern or color.
Press SLEEP repeatedly.
To cancel Sleep Timer, press SLEEP
repeatedly to select “SLEEP OFF”.
(LBT-GPX77/MHC-GPX88/GPX77
only)
Press LED PATTERN or LED COLOR to
show current setting. Press again to
change the illumination pattern or color
on the unit and the speakers
instantaneously.
Tip
To check the remaining time before the system
turns off, press SLEEP.
Play Timer/Recording Timer
Make sure you have set the clock.
(LBT-GPX55/MHC-GPX55/GPX33
only)
Press LED PATTERN or LED COLOR to
show current setting. Press again to
change the illumination pattern or color
on the unit instantaneously.
Play Timer:
You can wake up to disc, tuner or USB
device at a preset time.
Recording Timer:
You can transfer music from a preset radio
station into a USB device at a specified
time.
To turn off the illumination, press LED
PATTERN repeatedly to select
“PATTERN OFF”.
1
For Play Timer:
Prepare the sound source, then press
VOLUME +/– to adjust the volume.
To start from a specific track or file,
create your own program (page 17).
Using the timers
For Recording Timer:
The system offers three timer functions.
You cannot activate both the Play Timer
and the Recording Timer at the same time.
If you use either with the Sleep Timer, the
Sleep Timer has priority.
Tune to the preset radio station
2 (page 22).
Press TIMER MENU.
3
Press
/
repeatedly to select
“PLAY SET” or “REC SET”, then
press
.
4
Set the time to start playback or
transferring.
Press
/
repeatedly to set the hour/
minute, then press
.
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5
6
Use the same procedure as in
step 4 to set the time to stop
playback or transferring.
Changing the display
Changing the display mode
Press
the sound source you want, then
press
/
repeatedly to select
Press DISPLAY repeatedly while
the system is turned off.
.
For Recording Timer:
Demonstration
Connect a transferable USB device to
the B port.
The display changes and the indicator
flashes even when the system is turned
off.
7
Press "/1 to turn off the system.
No display (Power Saving Mode)
To check the timer setting or
activate the timer again
The display is turned off to conserve
power. The timer and clock continue to
operate.
1 Press TIMER MENU.
“TIMER SELECT” flashes in the
display panel.
Clock
The clock display automatically turns to
Power Saving Mode after a few seconds.
2 Press
.
3 Press
/
repeatedly to select
“PLAY SELECT” or “REC
Changing the spectrum
SELECT”, then press
.
pattern of the display panel
To cancel the timer
Repeat the same procedure as above and
select “TIMER OFF” in step 3, and then
1
2
Press OPTIONS on the unit.
Press repeatedly to select
“SPECTRUM”, then press
Press repeatedly to select
the spectrum pattern you want,
then press
/
press
.
.
Notes
• The system turns on before the preset time. If
the system is turned on at the preset time or if
“STANDBY” flashes in the display panel, the
Play Timer and the Recording Timer will not
play or transfer.
• Do not operate the system from the time the
system turns on until the playback or
transferring starts.
3
/
.
To exit the OPTIONS menu, press
OPTIONS on the unit.
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Viewing information in the
display panel
Deactivating the
buttons on the unit
Press DISPLAY repeatedly when
the system is turned on.
(Child Lock)
You can deactivate the buttons on the unit
(except "/1) for preventing
misoperation, such as child mischief.
You can view the information as follows:
• For AUDIO CD:
– The elapsed playing time and
remaining playing time during
playback.
– The total playing time when playback
is stopped.
• For audio files:
Hold down x on the unit for more
than 5 seconds.
“CHILD LOCK” and “ON” appear in the
display panel.
You can only operate the system using the
buttons on the remote control.
To cancel, hold down x on the unit for
more than 5 seconds until “CHILD
LOCK” and “OFF” appear in the display
panel.
– The elapsed playing time, file name
and folder name.
– The title, artist and album information.
Note
The elapsed playing time of an audio file
encoded using a VBR (variable bit rate) is not
displayed correctly.
Note
Child Lock function will be canceled when you
disconnect the power cord.
Using optional
equipment
1
Press VOLUME – repeatedly
until “VOLUME MIN” appears in
the display panel.
2
3
Connect an optional equipment
(page 10).
Press FUNCTION repeatedly to
select the function which
corresponds to the connected
equipment.
4
5
Start playing the connected
equipment.
Press VOLUME + repeatedly to
adjust the volume.
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Music discs encoded with copyright
protection technologies
Additional Information
This product is designed to play back
discs that conform to the Compact Disc
(CD) standard. Recently, various music
discs encoded with copyright protection
technologies are marketed by some record
companies. Please be aware that among
those discs, there are some that do not
conform to the CD standard and may not
be playable by this product.
Playable discs
• AUDIO CD
• CD-R/CD-RW
– audio data
– MP3 files that conforms to ISO9660
Level 1/Level 2, or Joliet (expansion
format).
Notes
• MP3 (MPEG 1 Audio Layer-3) is a standard
format defined by ISO (International
Organization for Standardization) which
compresses audio data. MP3 files must be in
MPEG 1 Audio Layer-3 format.
Notes on playing multisession discs
• This system can play back multisession
discs when an MP3 file is contained in
the first session. Any subsequent MP3
files recorded in later sessions can also
be played back (If later sessions contain
AUDIO CD format, the system cannot
play back this multisession discs).
• If the first session is recorded in AUDIO
CD format, only the first session will be
played back.
• The system can only play back MP3 files that
have a file extension of “.mp3”.
Discs that cannot be played back
• CD-ROM
• CD-R/CD-RW which has the following
conditions:
– Recorded in MP3 PRO format
– Recorded in multisession that have not
ended by “closing the session”
– Recorded with an incompatible
recording device
– Poor recording quality
– Scratches or dirty
– Finalized incorrectly
• Discs of non-standard shape (e.g., heart,
square, star and etc.)
• Discs that have adhesive tape, paper, or
sticker attached to them
• Rental or used discs with attached seals
where the glue extends beyond the seal
• Discs that have labels printed using ink
that feels tacky when touched
Websites for
compatible devices
Check the websites below for the latest
information about compatible USB and
Bluetooth devices.
For customers in Latin America:
<http://esupport.sony.com/LA>
For customers in the United States:
<http://www.esupport.sony.com/>
For customers in Europe and Russia:
<http://support.sony-europe.com/>
For customers in other countries/regions:
<http://www.sony-asia.com/support>
Note on DualDiscs
A DualDiscs is a two sided disc product
which mates DVD recorded material on
one side with digital audio material on the
other side. However, since the audio
material side does not conform to the
Compact Disc (CD) standard, playback
on this product is not guaranteed.
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There is no microphone sound.
(MHC-GPX88 only)
• Adjust the microphone volume.
• Make sure the microphone is connected
to the MIC jack correctly.
Troubleshooting
Should you encounter a problem with
your system, find your problem in the
troubleshooting checklist below and take
the corrective action.
• Make sure the microphone is turned on.
There is severe hum or noise.
• Move the system away from sources of
noise.
• Connect the system to a different wall
outlet.
• Install a noise filter (commercially
available) to the power cord.
• Turn off surrounding electrical
equipment.
If the problem persists, consult your
nearest Sony dealer.
Note that if the service personnel changes
some parts during repair, these parts may
be retained.
If “PROTECT EXX” (X is a number)
appears in the display panel
Immediately unplug the power cord,
and check the following items.
• Are you using only the supplied
speakers?
• Is anything blocking the ventilation
holes of the unit?
• Check the timer setting and set the
correct time (page 29).
• Cancel the Sleep Timer function
(page 29).
The remote control does not function.
remote control and the unit.
• Move the remote control closer to the
unit.
• Point the remote control at the unit’s
sensor.
• Replace the batteries (R6/size AA).
• Move the unit away from the
fluorescent light.
After checking the above items and
fixing any problems, plug in the power
cord again and turn on the system. If
the issue persists, consult your nearest
Sony dealer.
General
The clock or timer setting is canceled.
• The power cord is disconnected or a
power failure occurred. Set the clock
(page 14) and timer (page 29) again.
There is acoustic feedback.
• Reduce the volume.
• (MHC-GPX88 only) Move the
microphone away from the speakers or
change the direction of the microphone.
There is no sound.
• Adjust the volume.
• Check the speaker connections
(page 10).
“CHILD LOCK” appears when you
press any button on the unit.
• Set the Child Lock function to off
(page 31).
• Check the connection of the optional
equipment, if any (page 10).
• Turn on the connected equipment.
• There is no audio output during
Recording Timer.
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• Wipe the disc clean (page 38).
• Reload the disc.
• Move the unit to a place with no
vibration (e.g., on top of a stable stand).
• Move the speakers away from the unit,
or place them on separate stands. When
you listen to a track with bass sounds at
high volume, the speaker vibration may
cause the sound to skip.
Speakers
Sound comes from one channel or
unbalanced left and right volume.
• Place the speakers as symmetrically as
possible.
• Check that the speakers are connected
securely and correctly.
• The source being played back is
monaural.
Playback does not start from the first
track.
• Set the play mode to Normal Play
(page 17).
There is no sound from a specific
speaker.
• Check that the speaker is connected
securely and correctly.
• (LBT-GPX55/MHC-GPX88/GPX55
only)
Set the subwoofer level to the
appropriate level (page 27).
The folder name, track name, file
name and ID3 tag characters do not
appear properly.
• The ID3 tag is not Version 1(1.0/1.1)
and Version 2(2.2/2.3).
• The character code that can be displayed
– Upper cases (A to Z)
Disc player
The disc tray does not open and
“LOCKED” appears in the display
panel.
– Numbers (0 to 9)
– Symbols (< > * +, [ ] \ _)
• Consult your nearest Sony dealer or
local authorized Sony service facility.
Other characters appear as “_”.
USB device
The disc tray does not close.
• Load the disc correctly.
Transferring results in an error.
• You are using an unsupported USB
device. Check the information on the
websites about compatible USB devices
(page 15).
• The USB device is not formatted
correctly. Refer to the operating
instructions of the USB device on how
to format.
The disc does not eject.
• You cannot eject the disc during
CD-USB Synchronized Transfer or
REC1 Transfer. Press x to cancel the
transfer, then press Z OPEN/CLOSE
on the unit to eject the disc.
• Consult your nearest Sony dealer.
Playback does not start.
• Turn off the system and remove the
USB device. If the USB device has a
power switch, turn the USB device off
and then on again after removing it from
the system. Then perform transferring
again.
• Wipe the disc clean (page 38).
• Reload the disc.
• Load the disc that this system can play
back (page 32).
• Remove the disc and wipe away the
moisture on the disc, then leave the
system turned on for a few hours until
the moisture evaporates.
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• If the transferring and erase operations
are repeated multiple times, the file
structure within the USB device
becomes fragmented. Refer to the
operating instructions supplied with the
USB device on how to deal with this
problem.
• The USB device was disconnected or
the power was turned off during
transferring. Delete the partially-
transferred file, and perform
transferring again. If this does not fix the
problem, the USB device may be
broken. Refer to the operating
instructions of the USB device on how
to deal with this problem.
• The bit rate used when encoding audio
files was low. Send audio files with
higher bit rate to the USB device.
“READING” is displayed for an
extended time, or it takes a long time
before playback starts.
• The reading process can take a long time
in the following cases.
– There are many folders or files on the
USB device (page 16).
– The file structure is extremely
complex.
– The memory capacity is excessive.
– The internal memory is fragmented.
“OVER CURRENT” appears.
• A problem has been detected with the
Audio files or folders on the USB
device cannot be erased.
• Check if the USB device is write-
protected.
• The USB device was disconnected or
the power was turned off during the
erase operation. Delete the partially-
erased file. If this does not fix the
problem, the USB device may be
broken. Refer to the operating
instructions of the USB device on how
to deal with this problem.
level of electrical current from the
port or B port. Turn off the system
and remove the USB device from the
A
port. Make sure there is no problem with
the USB device. If this display pattern
persists, contact your nearest Sony
dealer.
Erroneous display.
• The data stored in the USB device may
have been corrupted, perform the
transferring again.
• The character code that can be displayed
by this system are as follows:
– Upper cases (A to Z)
– Numbers (0 to 9)
– Symbols (< > * +, [ ] \ _)
Other characters appear as “_”.
There is no sound.
• The USB device is not connected
correctly. Turn off the system and
reconnect the USB device, then turn on
the system and check if “USB A” or
“USB B” lights up in the display panel.
The USB device is not recognized.
• Turn off the system and reconnect the
USB device, then turn on the system.
• Check the information on the websites
about compatible USB devices
(page 15).
• The USB device does not work
properly. Refer to the operating
instructions of the USB device on how
to deal with this problem.
There is noise, skipping, or distorted
sound.
• You are using an unsupported USB
device. Check the information on the
websites about compatible USB devices
(page 15).
• Turn off the system and reconnect the
USB device, then turn on the system.
• The music data itself contains noise, or
the sound is distorted. Noise may have
entered during the transferring process.
Delete the file, and try transferring
again.
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Playback does not start.
• Change antenna location and its
orientation to obtain good reception.
• Connect a commercially available
external antenna.
• Consult your nearest Sony dealer if the
supplied AM antenna has come off from
the plastic stand.
• Turn off the system and reconnect the
USB device, then turn on the system.
• Check the information on the websites
about compatible USB devices
(page 15).
Playback does not start from the first
file.
• Set the play mode to Normal Play.
• Turn off surrounding electrical
equipment.
Bluetooth device
Audio file cannot be played back.
• USB device formatted with file systems
other than FAT16 or FAT32 are
unsupported.*
• A WMA audio file that is the WMA
DRM, WMA Lossless, or WMA PRO
format cannot be played back.
• An AAC audio file that is the AAC
DRM or AAC Lossless format cannot
be played back.
Pairing cannot be done.
• Move the Bluetooth device closer to the
system.
• Pairing may not be possible if other
Bluetooth devices are present around the
system. In this case, turn off the other
Bluetooth devices.
• Make sure the correct passkey was
entered at the Bluetooth device.
• AAC audio files encoded at 96 kHz
cannot be played back.
Connection is not possible.
connect does not support the A2DP
profile, and cannot be connected with
the system.
• Enable the Bluetooth function of the
Bluetooth device.
• Establish a connection from the
Bluetooth device.
• The pairing registration information has
been erased. Perform the pairing
operation again.
• While connected to a Bluetooth device,
this system cannot be detected and a
connection cannot be established from
another Bluetooth device which is never
paired before.
• Erase the pairing registration
information of the Bluetooth device
(page 25) and perform the pairing
operation again (page 23).
• In case multiple partitions exist in USB
device that is being used, files may not
be played back.
• The system can play back to a depth of
8 folders only.
• Files that are encrypted or protected by
passwords and etc. cannot be played
back.
• Files with DRM (Digital Rights
Management) copyright protection
cannot be played back by this system.
• The MP3 PRO audio file can be played
back as MP3 audio file.
* This system supports FAT16 and FAT32, but
some USB device may not support all of these
FAT. For details, refer to the operating
instructions of each USB device or contact the
manufacturer.
Tuner
The sound skips or fluctuates, or the
connection is lost.
• The system and the Bluetooth device are
too far apart.
Severe hum or noise, or stations
cannot be received. (“TUNED” or
“ST” flashes in the display panel.)
• Connect the antenna properly.
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• If there are obstacles between the
system and your Bluetooth device,
remove or avoid the obstacles.
• If there is equipment that generates
electromagnetic radiation, such as a
wireless LAN, other Bluetooth device,
or a microwave oven nearby, move
them away.
Messages
Disc/Timer
NO DISC
There is no disc on the disc tray or you
have loaded a disc that cannot be played
back on this system.
The sound of your Bluetooth device
cannot be heard on this system.
• Increase the volume on your Bluetooth
device first, and then adjust the volume
using VOLUME +/–.
NO STEP
All of the programmed steps have been
erased.
NOT IN USE
You tried to perform a specific operation
under conditions where that operation is
prohibited.
There is severe hum, noise or
distorted sound.
• If there are obstacles between the
system and your Bluetooth device,
remove or avoid the obstacles.
• If there is equipment that generates
electromagnetic radiation, such as a
wireless LAN, other Bluetooth device,
or a microwave oven nearby, move
them away.
OFF TIME NG
The Play Timer or Recording Timer start
time and stop time is the same.
PUSH SELECT
You tried to set the clock or timer during
timer operation.
PUSH STOP
• Turn down the volume of the connected
Bluetooth device.
You tried to perform an operation that can
be performed only when the playback is
stopped.
To reset the system
If the system still does not operate
properly, reset the system to factory
default settings.
Use the buttons on the unit to perform this
operation.
READING
The system is reading information of the
disc or USB device. Some operations are
not available.
STEP FULL
1 Unplug and plug the power cord
You tried to program more than 25 steps.
back in.
UNLOCK
The disc theft-preventive function is
released.
2 Press "/1 to turn on the system.
3 Hold down x and LED COLOR at
the same time for about 3 seconds.
“RESET” appears in the display panel.
All user-configured settings, such as
preset radio stations, timer, and the
clock are reset to factory default
setting.
USB device
DEVICE FULL
The memory of the USB device is full.
FATAL ERROR
The USB device was removed during
transfer or erase operation, and may have
been damaged.
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FOLDER FULL
The number of folders has reached the
maximum.
Precautions
When carrying the unit
NO DEVICE
Perform the following procedure to
protect the disc mechanism.
Use the buttons on the unit to perform this
operation.
No USB device is connected.
NO MEMORY
The memory selected for playback or
transfer has no memory media inserted in
the USB device.
1 Press "/1 to turn on the system.
NO STEP
All of the programmed steps have been
erased.
2 Press CD.
3 Remove the disc.
Press Z OPEN/CLOSE to open and
close the disc tray.
NO TRACK
No playable file is loaded in the system.
Wait until “NO DISC” appears in the
display panel.
NOT IN USE
You tried to perform a specific operation
under conditions where that operation is
prohibited.
4 Hold down CD and FLANGER for
3 seconds.
“MECHA LOCK” appears in the
display panel.
NOT SUPPORTED
An unsupported or unknown USB device
is connected, or the USB device is
connected through a USB hub.
5 Unplug the power cord.
Notes on discs
• Before playing, wipe the disc with a cleaning
cloth from the center outward to the edge.
• Do not clean discs with solvents, such as
benzine, thinner, or commercially available
cleaners or anti-static spray intended for vinyl
LPs.
• Do not expose discs to direct sunlight or heat
sources such as hot air ducts, nor leave it in a
car parked in direct sunlight.
PROTECTED
The USB device is write-protected.
PUSH STOP
You tried to perform an operation that can
be performed only when the playback is
stopped.
READING
The system is reading information of the
USB device. Some operations are not
available.
On safety
• Completely disconnect the power cord (mains
lead) from the wall outlet (mains) if it is not
going to be used for an extended period of
time. When unplugging the unit, always grip
the plug. Never pull the cord itself.
• Should any solid object or liquid get into the
system, unplug the system, and have it
checked by qualified personnel before
operating it again.
• (For customers in United States only)
One blade of the plug is wider than other for
the purpose of safety and will fit to the wall
outlet only one way. If you are unable to insert
the plug fully in the outlet, contact your
dealer.
REC ERROR
The transfer did not start, stopped
partway, or otherwise could not be
performed.
STEP FULL
You tried to program more than 25 steps.
TRACK FULL
The number of files has reached the
maximum.
• AC power cord must be changed only at the
qualified service shop.
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• Bluetooth devices and wireless LAN
(IEEE 802.11b/g) use the same frequency
band (2.4 GHz). When using your Bluetooth
device near a device with wireless LAN
capability, electromagnetic interference may
occur. This could result in lower data transfer
rates, noise, or inability to connect. If this
happens, try the following remedies:
– Try connecting this system and Bluetooth
device when you are at least 10 meters
(33 feet) away from the wireless LAN
equipment.
– Turn off the power to the wireless LAN
equipment when using your Bluetooth
device within 10 meters (33 feet).
• The radio waves broadcast by this system may
interfere with the operation of some medical
devices. Since this interference may result in
malfunction, always turn off the power on this
system and Bluetooth device in the following
locations:
On placement
• Do not place the system in an inclined
position or in locations that are extremely hot,
cold, dusty, dirty, or humid or lacking
adequate ventilation, or subject to vibration,
direct sunlight or a bright light.
• Be careful when placing the unit or speakers
on surfaces that have been specially treated
(for example, wax, oil, polish) as staining or
discoloration of the surface may result.
• If the system is brought directly from a cold to
a warm location or is placed in a very damp
room, moisture may condense on the lens
inside the unit, and cause the system to
malfunction. In this situation, remove the
disc, and leave the system turned on for about
an hour until the moisture evaporates.
On heat buildup
• Heat buildup on the unit during operation is
normal and is not a cause for alarm.
• Do not touch the cabinet if it has been used
continuously at a high volume because the
cabinet may have become hot.
– In hospitals, on trains, in airplanes, at gas
stations, and any place where flammable
gases may be present
• Do not obstruct the ventilation holes.
– Near automatic doors or fire alarms
• This system supports security functions that
comply with the Bluetooth specification as a
means of ensuring security during
communication using Bluetooth technology.
However, this security may be insufficient
depending on the setting contents and other
factors, so always be careful when performing
communication using Bluetooth technology.
• Sony cannot be held liable in any way for
damages or other loss resulting from
information leaks during communication
using Bluetooth technology.
• Bluetooth communication is not necessarily
guaranteed with all Bluetooth devices that
have the same profile as this system.
• Bluetooth devices connected with this system
must comply with the Bluetooth specification
prescribed by the Bluetooth SIG, Inc., and
must be certified to comply. However, even
when a device complies with the Bluetooth
specification, there may be cases where the
characteristics or specifications of the
Bluetooth device make it impossible to
connect, or may result in different control
methods, display or operation.
On the speaker system
This speaker system is not magnetically
shielded, and the picture on nearby TV sets may
become magnetically distorted. In this situation,
turn off the TV, wait 15 to 30 minutes, and turn
it back on. If there is no improvement, move the
speakers far away from the TV.
Cleaning the cabinet
Clean this system with a soft cloth slightly
moistened with a mild detergent solution.
Do not use any type of abrasive pad, scouring
powder, or solvent, such as thinner, benzine,
or alcohol.
On Bluetooth Communication
• Bluetooth devices should be used within
approximately 10 meters (33 feet)
(unobstructed distance) of each other. The
effective communication range may become
shorter under the following conditions.
– When a person, metal object, wall or other
obstruction is between the devices with a
Bluetooth connection
– Locations where a wireless LAN is installed
– Around microwave ovens that are in use
– Locations where other electromagnetic
waves occur
• Noise may occur or the audio may cut off
depending on the Bluetooth device connected
with this system, the communications
environment, or surrounding conditions.
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LBT-GPX55/MHC-GPX55
Front speaker
Specifications
AUDIO POWER
Power Output (rated):
350 W + 350 W (at 4 ohms, 1 kHz,
1% THD)
RMS output power (reference):
550 W + 550 W (per channel at
4 ohms, 1 kHz)
SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
(USA model only)
With 4 ohm loads, both channels driven,
from 120 – 10,000 Hz; rated 130 watts per
channel minimum RMS power, with no
more than 0.7% total harmonic distortion
from 250 milliwatts to rated output.
Subwoofer
RMS output power (reference):
500 W (5 ohms, 100 Hz)
MHC-GPX33
Front speaker
Power Output (rated):
350 W + 350 W (at 4 ohms, 1 kHz,
1% THD)
RMS output power (reference):
600 W + 600 W (per channel at
4 ohms, 1 kHz)
Amplifier section
The following are measured at
USA model:
AC 120 V, 60 Hz
Mexican model:
AC 120 V – 240 V, 60 Hz
Other models:
Inputs
TV/DVD/SAT (AUDIO IN) L/R
Voltage 2 V, impedance 47 kilohms
PC/GAME (AUDIO IN) L/R
Voltage 2 V, impedance 47 kilohms
MIC (MHC-GPX88 only)
Sensitivity 1 mV, impedance
10 kilohms
AC 120 V – 240 V, 50/60 Hz
MHC-GPX88
Front speaker
Power Output (rated):
350 W + 350 W (at 4 ohms, 1 kHz,
1% THD)
RMS output power (reference):
600 W + 600 W (per channel at
4 ohms, 1 kHz)
A (USB), B (USB) port: Type A
USB section
Supported bit rate
Subwoofer
WMA:
RMS output power (reference):
500 W + 500 W (per channel at
5 ohms, 100 Hz)
48 kbps – 192 kbps, VBR, CBR
AAC:
48 kbps – 320 kbps, VBR, CBR
Sampling frequencies
WMA:
LBT-GPX77/MHC-GPX77
HIGH speakers
Power Output (rated):
44.1 kHz
350 W + 350 W (at 4 ohms, 1 kHz,
1% THD)
AAC:
44.1 kHz
RMS output power (reference):
600 W + 600 W (per channel at
4 ohms, 1 kHz)
Supported USB device
Mass Storage Class
Maximum current
500 mA
LOW speakers
RMS output power (reference):
300 W + 300 W (8 ohms, 100 Hz)
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AM tuner section
Tuning range
Disc/USB section
Supported bit rate
Pan American and Australia models:
MPEG1 Layer-3:
531 kHz – 1,710 kHz (9 kHz step)
530 kHz – 1,710 kHz (10 kHz step)
Saudi Arabian model:
531 kHz – 1,602 kHz (9 kHz step)
Other models:
32 kbps – 320 kbps, VBR
MPEG2 Layer-3:
8 kbps – 160 kbps, VBR
MPEG1 Layer-2:
32 kbps – 384 kbps, VBR
Sampling frequencies
MPEG1 Layer-3:
531 kHz – 1,602 kHz (9 kHz step)
530 kHz – 1,610 kHz (10 kHz step)
32 kHz/44.1 kHz/48 kHz
MPEG2 Layer-3:
16 kHz/22.05 kHz/24 kHz
MPEG1 Layer-2:
Bluetooth section
Communication system
Bluetooth Standard version 3.0 + EDR
(Enhanced Data Rate)
Output
32 kHz/44.1 kHz/48 kHz
Bluetooth Standard Power Class 2
Maximum communication range
Line of sight approx. 10 m
Frequency band
Disc player section
System
Compact disc and digital audio system
Laser Diode Properties
1)
2.4 GHz band (2.4000 GHz –
2.4835 GHz)
Emission Duration: Continuous
Laser Output*: Less than 44.6 W
* This output is the value measurement at
a distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Modulation method
FHSS (Freq Hopping Spread
Spectrum)
2)
Compatible Bluetooth profiles
Frequency response
20 Hz – 20 kHz
A2DP (Advanced Audio Distribution
Profile)
Signal-to-noise ratio
More than 90 dB
Dynamic range
AVRCP 1.3 (Audio Video Remote
Control Profile)
Supported codecs
More than 88 dB
SBC (Sub Band Codec)
AAC (Advanced Audio Coding)
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna:
1)
The actual range will vary depending on
factors such as obstacles between devices,
magnetic fields around a microwave oven,
static electricity, reception sensitivity,
antenna’s performance, operating system,
software application, etc.
FM lead antenna
AM loop antenna
FM tuner section
Tuning range
2)
Bluetooth standard profiles indicate the
purpose of Bluetooth communication between
USA and Brazilian models:
87.5 MHz – 108.0 MHz (100 kHz step)
Other models:
devices.
87.5 MHz – 108.0 MHz (50 kHz step)
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Speakers
Subwoofer
SS-WGP88 for MHC-GPX88
SS-WGP55 for LBT-GPX55/
MHC-GPX55
Front speaker
SS-GPX88 for MHC-GPX88
SS-GPX77 for LBT-GPX77/
MHC-GPX77
Subwoofer system
1-way, Bass reflex
SS-GPX55 for LBT-GPX55/
MHC-GPX55
SS-GPX33 for MHC-GPX33
Speaker system
Speaker unit
Subwoofer: 250 mm (9 7/8 in), cone
type
Rated impedance
SS-GPX88/GPX55/GPX33:
2-way, Bass reflex
SS-GPX77: 3-way, Bass reflex
Speaker unit
SS-WGP88/WGP55: 5 ohms
Dimensions (w/h/d) (Approx.)
SS-WGP88/WGP55: 360 mm ×
395 mm × 330 mm (14 1/4 in ×
15 5/8 in × 13 in)
Woofer (cone type): 200 mm (7 7/8 in)
Tweeter (horn type):
Mass (Approx.)
(SS-GPX88/GPX77) 25 mm (1 in)
(SS-GPX55/GPX33) 20 mm (13/16 in)
Subwoofer (cone type):
(SS-GPX77) 200 mm (7 7/8 in)
Rated impedance
SS-WGP88: 8.5 kg (18 lb 12 oz)
SS-WGP55: 8.6 kg (18 lb 16 oz)
Quantity:
MHC-GPX88: 2 pieces
LBT-GPX55/MHC-GPX55: 1 piece
SS-GPX88/GPX55/GPX33: 4 ohms
SS-GPX77:
HIGH: 4 ohms
LOW: 8 ohms
Dimensions (w/h/d) (Approx.)
SS-GPX88: 360 mm × 604 mm ×
330 mm (14 1/4 in × 23 7/8 in × 13 in)
SS-GPX77: 360 mm × 604 mm ×
390 mm (14 1/4 in × 23 7/8 in ×
15 3/8 in)
SS-GPX55/GPX33: 290 mm ×
395 mm × 320 mm (11 1/2 in ×
15 5/8 in × 12 5/8 in)
Mass (Approx.)
SS-GPX88: 12.2 kg (26 lb 15 oz)
SS-GPX77: 14 kg (30 lb 14 oz)
SS-GPX55/GPX33: 6.9 kg
(15 lb 4 oz)
Quantity: 2 pieces
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General
Power requirements
USA model:
AC 120 V, 60 Hz
Mexican model:
AC 120 V – 240 V, 60 Hz
Other models:
AC 120 V – 240 V, 50/60 Hz
Power consumption
MHC-GPX88: 350 W
LBT-GPX77/MHC-GPX77: 265 W
LBT-GPX55/MHC-GPX55: 255 W
MHC-GPX33: 195 W
Dimensions (w/h/d) (excl. speakers)
(Approx.)
270 mm × 363 mm × 364 mm
(10 3/4 in × 14 3/8 in × 14 3/8 in)
Mass (excl. speakers) (Approx.)
HCD-GPX88/GPX77/GPX55/
GPX33: 5.2 kg (11 lb 8 oz)
Supplied accessories
Remote control (1)
R6 (Size AA) batteries (2)
FM lead/AM loop antenna (1)
Spacer (MHC-GPX88 only) (2)
Speaker pads (MHC-GPX88 only)
(16)
Speaker pads (LBT-GPX77/
MHC-GPX77 only) (8)
Design and specifications are subject to
change without notice.
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