Here is an update on the Axiom AX 120 vintage subwoofer. I finally had the time to look inside the speaker so while referring back to the pictures I posted this is what I found. The lower terminals have wires that go to the upper terminals and what I believe is a crossover filter. The upper terminals have wire that goes to the woofer. I am going to run input wires to the lower terminals from my receiver and then output wires from the subwoofers to my AX2 speakers. I will let you know how it sounds after some listening tests.