V90/XC90/S90 HK AUD .VBF Files

[IMAY2023]

There might be some sort of improvements by separating the MIDs and highs on the amp level rather using condensers on the speakers. But I doubt if you can really noticed the difference by listening to gen1 and gen2.  In order to compare apples to apples, you need to have the same audio source, same settings (Bass, treble, sub-wofer levels and equalizer).  
If you already have B&W gen1, I don't think it worth all the work and not to mention replacement of the center speaker on the dash.