V90/XC90/S90 HK AUD .VBF Files

[spacemanspiff]

C10  - Center_Speaker_pos
C2 - Center_Speaker_neg

B1A0813 is not the Subwoofer in the trunk. It's the subwoofer on the right one of the doors. 

Description:
Subwoofer module (SUB) checks the signal on the signal line to the voice coil in right bass speaker. The diagnostic trouble code (DTC) is stored if the control module detects that: Signal missing on the signal cable to voice coil in the right bass speaker. The control module's test for the diagnostic trouble code (DTC) starts in the event of: Start up of the MOST network. Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.
Cause:
Open-circuit in the signal cable between the amplifier and voice coil in the bass loudspeaker.  

I don't know if you replaced your woofers on the doors or just added the tweeters, the woofer speakers on the doors are all different for HP, HK and B&W. They respond to different frequencies and they all have different impedance.  

If you by mistake switch the negative to positive, you will still hear sound from the speaker but in reversed phase and AUD might detect it as open circuit.

@IMAY2023, I was thinking about this some more last night and are you sure that B1A08 refers to one of the door woofer/bass speakers? I ask because doing the switch from HP to HK, I did not have to re-wire or re-pin the channels/wiring for the door woofers at all. I did change the speakers to the proper HK versions. So I'm wondering how there could be a fault code for those speakers.

It seems like it would make more sense if B1A08 referred to the subwoofer in the trunk (as suggested by this DTC guide B1A08 DTC ) because the subwoofer was added as part of the change from HP to HK and therefore carried with it the chance that the polarity was wired in reverse.