Question for the experts.

I'm building a Zaph centre channel speaker and need to unwind 1.0 inductor to get 0.8. He specifies 20g Jantzen unwound 7 times. Assuming it does matter, do I unwind from the inside or outside?

Outside. If it is iron cored you have no choice! The number of turns dictates the mH, whether inside or outside. The outside turns being longer have more impedance.

Thats what I would have guessed but nice to know, thank you.