I just hooked up Sherwood 6.1 digital receiver RD 7108. (great deal-paid $93 new!). Anyway, I am using an Apex AD-800 DVD player w/built in decoder. Tested my hook up w/Empire strikes back in dolby digital EX (auto detected the sound source). The center speaker produced no voice track-just backround sound. Still fiddling with the 6.1 features, would the Apex cause a problem because of the decoder? It's hooked up thru digital coaxl if that helps.