Subwoofer Crossover Setting with B&W 805S

Not trying to be ugly but, you have ears, set it where it's ideal to your liking. Ask 10 people that question and you are likely to get 10 different answers. Sorry if my post upsets you, it is certainly not my intention.

I agree with Tp - To me there are basically 2 schools of thought. 1 would be to cross them over high like you are doing to add to what the 805's already can do (which in my opinion is unrealistic bass). The other would be cross them over much lower just to pick up what the 805's can't physically reproduce. I prefer that latter. So which way is correct? Which ever way YOU prefer.

Sorry, but nobody can possibly answer this. Bass is so dependent on the room. Where the bass rolls off with the 805's in your room will be very different than in another room. Then, where you place the sub in that room will make a huge difference as well. So, this question can't be answered. You just have to experiment to find what you think works best.