Sirquack is very correct here. You better be armed with the right hardware to do this. Your reciever should have an extra channel that is not being used. Or, if you are using a separate processor, it should have inputs for 2 center channel speakers (like my Rotel RSP1066). I don't like to "splice" in my HT setup. Very bad things can happen!

pn

paul

Axiom M80, VP180, Qs8, EP500
Epson 3020
Rotel RB-880
Denon AVR-990