Yea. I already have my Corsair SP2500 (Center/Sub) and Edifier 1600T Plus (Sides) connected to the daugtherboard. Using Dolby Pro Logic II in 2 channels it is fine, but when switching to 6 channels (which would disable Dolby Pro Logic II), the sound would only come out from the front speakers (Microlab Solo 7C).I don't know. you did buy the additional 7.1 card version yes?