Sony Speaker System LBTGPX55 User Manual

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  
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?  
The timer does not function.  
• 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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The sound skips.  
• 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.  
• The Bluetooth device you attempted to  
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)  
40GB  
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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)  
41GB  
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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  
42GB  
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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.  
43GB  
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©2013 Sony Corporation Printed in Malaysia  
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