A18 Amplifier Top Hifi

Plug connector overview

NumberX-pinDescription
X1877115Amplifier
X1877218Amplifier
X1877326Amplifier

Pin assignments at plug connector A X18771

PinTypeDescription / Signal typeConnection /
Measuring notes
1APositive signal, subwoofer speaker 1Subwoofer speaker
   
2APositive signal, subwoofer speaker 2Subwoofer speaker
   
3APositive activation, rear left wooferRear left speaker
   
4AAntenna signalRadio
   
5ENegative activation, rear right wooferRear right speaker
   
6ENegative signal, subwoofer speaker 4Subwoofer speaker
   
7ENegative signal, subwoofer speaker 3Subwoofer speaker
   
8ETerminal 30Fuse F64
   
9ENegative signal, subwoofer speaker 1Subwoofer speaker
   
10ENegative signal, subwoofer speaker 2Subwoofer speaker
   
11ENegative activation, rear left wooferRear left speaker
   
12APositive activation, rear right wooferRear right speaker
   
13APositive signal, subwoofer speaker 4Subwoofer speaker
   
14APositive signal, subwoofer speaker 3Subwoofer speaker
   
15AGroundGround point
   

Pin assignments at plug connector B X18772

PinTypeDescription / Signal typeConnection /
Measuring notes
1 Not used 
   
2ENegative signal, low frequencyTelephone
   
3 Not used 
   
4 Not used 
   
5E/AI-bus signal lineI-bus connector
   
6 Not used 
   
7 Not used 
   
8ENegative activation, front right loudspeakerRadio
   
9ENegative activation, front left loudspeakerRadio
   
10 Not used 
   
11APositive signal, low frequencyTelephone
   
12 Not used 
   
13ETelephone mute signalTelephone
   
14 Not used 
   
15ESignal line, night lightsEJECT box telephone
   
16 Not used 
   
17EPositive activation, front right loudspeakerRadio
   
18EPositive activation, front left loudspeakerRadio
   

Pin assignments at plug connector C X18773

PinTypeDescription / Signal typeConnection /
Measuring notes
1APositive activation, front left wooferFront left loudspeaker
   
2ANegative activation, front left wooferFront left loudspeaker
   
3 Not used 
   
4ANegative activation, front right medium-range speakerFront right speaker
   
5APositive activation, front left mid-range speakerFront left loudspeaker
   
6 Not used 
   
7 Not used 
   
8 Not used 
   
9APositive activation, front right medium-range speakerFront right speaker
   
10ANegative activation, front left mid-range speakerFront left loudspeaker
   
11APositive activation, rear right tweeterRear right speaker
   
12APositive activation, front right tweeterFront right speaker
   
13APositive activation, front right wooferFront right speaker
   
14APositive activation, front left tweeterFront left loudspeaker
   
15ANegative activation, front left tweeterFront left loudspeaker
   
16ANegative activation, rear left tweeterRear left speaker
   
17 Not used 
   
18 Not used 
   
19APositive activation, rear left tweeterRear left speaker
   
20 Not used 
   
21 Not used 
   
22 Not used 
   
23 Not used 
   
24ANegative activation, rear right tweeterRear right speaker
   
25ANegative activation, front right tweeterFront right speaker
   
26ANegative activation, front right wooferFront right speaker