Basic Crossover Layout Question

In laying out a crossover, I have studied the troelsgravesen information on inductor layout.

However, I have not read of any constraints on the routing of crossover wiring over, under, or around the open core coils. Are there any? I'm assuming any wiring close to or touching coils should be insulated.
 
I don’t think so, but I’m sure I’m wrong about it. I just know that all the ones I’ve made and the ones I see, people try to keep the wiring away from the coils. The coil makes a magnetic field and the wire you want to place on or beside the coil may get some noise in it
Never know until you try it
 
Air core coils should not be on the same axis ... if they are they will " couple " and will work as a " low coupling transformer " and this should be avoided. A wire comming close to a coil will not have any significant effect.
 
Air core coils should not be on the same axis ... if they are they will " couple " and will work as a " low coupling transformer " and this should be avoided. A wire comming close to a coil will not have any significant effect.

Thank you for your response.

So if I run a wire across and over a coil it will not cause any problem?

I will be building a crossover, for a bookshelf speaker, this weekend and the large air coils combined with the small size of the cabinet, make the layout a bit of a challenge.