Bower and Wilkins Retrofit -Volvo XC90 2025

[DavidStrLondon]

Hello,
I have just purchased a facelift 2025 Volvo XC90 plus with HK sound system.
I had a BMW M4 with HK system previously,and I was very happy with the sound system.
However,the Volvo doesn’t sound as well.
It seems the HK is lacking clarity and I wanted to know whether it would be possible so swap Bower and Wilkins speakers and amplifier.
I have found conflicting information online,so trying to find out more.
HK and BW share same harness?or it is a partial or complete rewiring?
Does the amp need to be coded to the car?
Any help would be appreciated!
Thanks!

[IMAY2023]

The Gen2 B&W AUD has more outputs than GEN1. 
GEN2 B&W has 3 outputs (LOW, MID and HIGH) for each door in addition, center output has two outputs (MID and HIGH) 
GEN1  B&W has 2 outputs (LOW and MID + HIGH) for each door in addition, center output has 1 outputs (MID + HIGH) 


GEN1 B&W for 90 series and HK have the same exact wiring but  not sure if VOLVO upgraded the HK on 2025 models to have the third channel on the doors. The center does not have the second HIGH anyway. 

Here is an important part. 
B&W has minimum 6 ohms impedance for speakers and for SUB it's 8.  The HK speakers are 4 ohms and HK AUD is minimum 4. 
This means, before replacing the AUD you must upgrade the speakers because HK speakers would overload the B&W AUD and eventually burn the outputs. 

But on the other hand,  HK AUD can easily drive the B&W speakers. 
So, if you want better sound, first replace the speakers especially the MIDs and Tweeters and the center dash to two way.