Stereophonic Sound from a Single Loudspeaker

[wchang]

(quoting-by-selecting-text stopped working)
Thanks for the clarification; x could turn out to be anything in that range though, no reason to be 1/3 without additional tricks.

 

[acmn]

You get k=1/3 when all speaker elements are supposed to have same resistance. That is R'=R.
k=1/(2+R/R').