Coil magnetic interference

In this depiction, if these three coils had to be placed close together on a circuit board, would their magnetic planes interfere with either of the other two coils?  And is each coil considered to be at 90 degrees, or perpendicular, to the other two coils?

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

No,they will not interfere,and this is the very reason high-end speaker builders place their coils this way. Anybody that tells you that "the coil values are optimized for same-plane mounting" is full of shiznit, as the compensation in such a mounting will be dynamic. It WILL NOT be the same compensation (value changes) at 1 watt as it would be at 100 watts. I mention this, becaus I have actually heard people say they have been compensated for, because of this mounting scheme.

I almost forgot, each coil will be 90 degrees to EACH of the other two coils, axis X, right (angles) to Y and Z, axis Y right to X and Z, and axis Z right to X and Y.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Oh good, you're on duty tonight!  I've been confused about coil magnetic planes but it's recently starting to sink in.  I posted a pic yesterday of the crammed circuit boards I put into my rear surround speakers (that you gave me such good help with, haemphyst :) and I suddenly realized after seeing the pic that I should pull those boards out and rearrange the coils.  They're all lying flat in the same plane.  There's four coils in a 4" X 7" space but I think if I use variations of these three ways of setting them, I can alleviate any interference that's going on.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Yep, I THOUGHT you were trying to trick me into posting... LOL

I thought about that same thing when I saw your pic posted yesterday. My bad... I neglected to mention this when we were working out your system. If you like to run lots of power on a fairly regular basis, I would definitely adjust their axes... If you never run more than a few watts (few: definition, up to 25 or so... even 50 watts is only 3.5A - not a lot of current to be concerned with), you will probably not see much difference. Transient response will be affected MOST by your present configuration, and if you are noticing transient lag, yeah, rearrange them. Whichever way you go, the multi-axis configuration will NEVER hurt.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."