Maybe this question has been asked before:
Is there a problem using Multistrand wire like speaker wire(not litz wire) for winding inductors, or transformers?
Would it work for building a Tesla coil for example?
Or for winding bifilar coils, seeing speaker wire is already bifiler off the roll.
The reason I ask is, I have lots of speaker wire on hand,
and it is very easy to get at the local stores.
But solid single strand magnet wire is only available through online orders.