New to the forum with SDA 1C speakers new to me.
Interestingly when I hooked up the Polks and connect them to my Niles Audio SV-6 speaker connector all is fine until I connected the crossover wire. When I do music plays whether the speaker switch for thr Polk's is "on" or "off". Plays better and louder when on but plays when off. Have you heard of such a thing? Niles tech support says "off" is a complete break.