MEX-XB100BT - Sony Car Audio Service Manual (repair manual). Page 17

This section is extracted 
from instruction manual.

Cautions

ˎ Run all ground (earth) leads to a common 

ˎ Do not get the leads trapped under a screw, or 

caught in moving parts (e.g., seat railing).

ˎ Before making connections, turn the car ignition 

off to avoid short circuits.

ˎ Connect the yellow and red power supply leads 

only after all other leads have been connected.

ˎ Be sure to insulate any loose unconnected leads 

with electrical tape for safety.

ˎ Choose the installation location carefully so that 

the unit will not interfere with normal driving 
operations.

ˎ Avoid installing the unit in areas subject to dust, 

dirt, excessive vibration, or high temperature, 
such as in direct sunlight or near heater ducts.

ˎ Use only the supplied mounting hardware for a 

safe and secure installation.

Note on the power supply lead (yellow)
When connecting this unit in combination with other 
stereo components, the amperage rating of the car 
circuit to which the unit is connected must be higher 
than the sum of each component’s fuse amperage 
rating.

Adjust the mounting angle to less than 45°.

Connection/Installation

Precautions

Connection

ʙ*

5

*

6

ʘ

from a wired remote control 
(not supplied)*

4

Satellite radio tuner 
(SiriusXM)*

1

White

White/black striped

Gray

Black

Yellow

Red

Blue/white striped (MAX 0.4A)

from a car antenna (aerial)

Front speaker*

1

*

2

*

7

Rear speaker*

1

*

2

*

7

Gray/black striped

Green

Green/black striped

Purple

Purple/black striped

Orange/white striped

*

3

*

3

*

3

Subwoofer*

1

Power amplifier*

1

For details, see “Making 
connections” (page 34).

Black

Yellow

ʗ

When connecting to the battery directly*

8

If you have any questions or problems concerning 
the connection, consult the dealer for details.

Subwoofer Easy Connection

You can use a subwoofer without a power amplifier 
when it is connected to a rear speaker cord.

Note
Use a subwoofer with an impedance of 4 to 8 ohms, 
and with adequate power handling capacities to avoid 
damage.

Memory hold connection

When the yellow power supply lead is connected, 
power will always be supplied to the memory 
circuit even when the ignition switch is turned off.

*

Less than 450 mm (18 in)

+12 V car battery

Fuse (15 A)

Front speaker

Subwoofer

*1 Not supplied
*2 Speaker impedance: 4 – 8 Ω × 4
*3 RCA pin cord (not supplied)
*4 Depending on the type of car, use an adaptor for a 

wired remote control (not supplied).
For details on using the wired remote control, see 
“Using the wired remote control” (page 35).

*5 Whether in use or not, route the microphone input 

cord such that it does not interfere with driving 
operations. Secure the cord with a clamp, etc., if it is 
installed around your feet. 

*6 For details on installing the microphone, see 

“Installing the microphone” (page 35).

*7 Use speakers with 50W RMS or higher power input 

capacity. Using Sony XB series full range speakers is 
recommended.

*8 When the amperage rating of the fuse used on your 

car is 10 A, make the power connection to the 
battery directly to avoid short circuits.

ɞ To the +12 V power terminal which is 

energized when the ignition switch is set to 
the accessory position
If there is no accessory position, connect to the 
+12 V power (battery) terminal which is 
energized at all times.
Be sure to first connect the black ground (earth) 
lead to a common ground (earth) point.

ɟ To the power antenna (aerial) control lead or 

the power supply lead of the antenna (aerial) 
booster
It is not necessary to connect this lead if there is 
no power antenna (aerial) or antenna (aerial) 
booster, or with a manually-operated telescopic 
antenna (aerial).
To AMP REMOTE IN of an optional power 
amplifier
This connection is only for amplifiers and a 
power antenna (aerial). Connecting any other 
system may damage the unit.

ɠ To a car’s illumination signal

Be sure to first connect the black ground (earth) 
lead to a common ground (earth) point.

ɡ To a common ground (earth) point

First connect the black ground (earth) lead, then 
connect the yellow and red power supply leads.

Making connections

ɢ To the +12 V power terminal which is 

energized at all times
Be sure to first connect the black ground (earth) 
lead to a common ground (earth) point.

When the amperage rating of the fuse used on your 
car is 10 A, make the power connection to the 
battery directly to avoid short circuits.
ɣ to a metal point of car
ɤ to the positive battery terminal

ˎ Despite connecting to the power supply lead of the 

car, the unit may not fully provide its performance 
due to insufficient power. In this case, make the 
power connection to the battery directly.

ˎ All power wires connected to the positive battery post 

should be fused within 450 mm (18 in) of the battery 
post, and before they pass through any metal. 

ˎ Make sure that the car’s battery wires connected to 

the car (ground (earth) to chassis)* are of a wire 
gauge at least equal to that of the main power wire 
connected from the battery to the head unit.

ˎ During full-power operation, a current of more than 

15 A will run through the system. Therefore, make 
sure that the wires to be connected to the +12 V and 
GND terminals of this unit are at least 14-Gauge 
(AWG14) or have a sectional area of more than 2mm² 
(

3

/

32

 in).

”

”