User guide
4
After Sales Support
UK/N.IRELAND HELPLINE N
O
:
REP.IRELAND HELPLINE N
O
:
WEBSITE:
EMAIL: 
01270 508538
1800 995 036
www.quesh.co.uk
enquiries@quesh.co.uk
Make sure that you have a good earth connection. A good earth connection will eliminate most electrical 
noise problems. A good earth connection requires a tight connection to the vehicle's metal chassis.
The area around the earth connection should be clean, bare metal without rust, paint, plastic, dust, or dirt 
for a good electrical connection.
Please Note:
Follow the above wiring diagram to install the 
head unit with new or existing speakers.
This unit is designed for use with four (4) speakers 
with an impedance between 4 Ohms to 8 Ohms. 
An impedance load of less than 4 Ohms could 
damage the unit.
Never bridge or combine the speaker wire 
outputs. When not using four speakers, use 
electrical tape to tape the ends of the un-used 
speaker outputs to prevent a short circuit.
Never connect the negative speaker terminals to 
earth connection
.
Wiring Connection
Connector A
1. Rear right speaker(+)/Purple
3. Front right speaker(+)/Grey
5. Front left speaker(+)/White
2. Rear right speaker(-)/Purple-Black
4. Front right speaker(-)/Grey-Black
6. Front left speaker(-)/White-Black
7. Rear left speaker(+)/Green
8. Rear left speaker(-)/Green-Black
Connector B
1. -
2. -
3. -
4. Battery 12V (+)/Yellow
5. Antenna power/Blue-White
6. -
7. ACC+/Red
8. Ground/Black
ISO-connector
A
B
RCA OUT
left=white
right=red
Antenna
socket










