[familymangreg]

I'd personally say that the sub in the XC90 is subtle, even cranked up to the max it doesn't thump through the car, just adds a nice depth and body to the sound. But unlike cranking the base up to full (a separate slider to the sub in the sound preferences), the sound doesn't start to distort or blur (not sure what the correct audio terms are here). I guess that because cranking the base up simply requests the system put as much base through the speakers as possible.

One thing I have found (again for my own personal preference) is that switching the equaliser on immediately gives the sound more life and depth, even with all the equaliser sliders set to their centre point.

If anything, the audio in the XC90 is quite 'top heavy', i.e. has quite a prominent tremble.

I've taken a pic of my current audio settings which is giving what I consider a nice crisp sound, with reasonable body and depth.

I had it in my head that the optional sub was under the passenger seat, I'm sure that's what a dealer had told me (so it must be true!). However it may well be built into the car chassis as others have suggested. However, as a £300 stand alone option, I wonder if what I was told was correct, and the sub built into the chassis of the car is part of the B&W setup? I'm sorry it I'm casting doubt on what others know to be correct.

:wq