Hey...no speaker diagram that I know of, but the system goes like this:
1. Fronts: L and R tweeters, in the A-Pillar, separately driven/crossed over at the amp/DSP module; 6x9 mid-bass drivers (paper cone crap) in the front door/footwell, separately driven/crossed over at the amp/DSP module. These are essentially a component set, 4ohm impedance.
2. Rears: Two 6.5" coaxials, tweeter and midbass driver. I think these are also separately driven/crossed over at the amp/DSP module...someone correct me on this, if wrong. 4ohm impedance.
3. Center: 3.5" paper cone mid driver, separately driven/crossed over at the amp/DSP module. I have been told by a local installer the center in the B&O is a 4ohm speaker, but have not seen a picture or confirmed that.
4. Subwoofer: behind rear seat, seems to have a different driver/surround from the one used in the Sony system.
This quote is from the "$500 Stereo Upgrade" thread:
I found this...wiring diagram for speakers from the B&O system's DSP...see #s 3 and 4:
https://www.f150forum.com/f118/2018-stereo-wiring-diagram-405122/
It does look like crossover happens at the amp/DSP module. I may look for 6x9 components now, or maybe 6.5s, and do the center, as well, so the entire front matches/is upgraded.
This thread has pics of speakers that came out of a B&O, all but the center:
http://www.fordraptorforum.com/f266/pics-b-o-stock-speakers-58955/
I think that covers it...look around this forum..there's a lot of good advice/discussion on the issues with upgrading the B&O. Good luck!