I'm unable to get my subwoofer to receive a bass signal, and transmit a bass sound, after connecting the coaxial cable, and going through the settings menus. My speaker size setting is config 1 (sub-woofer present), and in my subwoofer setting menu my crossover is 80 Hz, and my stereo mode is sat+sub. I've got older software installed on the AVR300, ver 2.67. Would this possibly be a reason for no bass audio? Or is there another menu somewhere, in one of the modes, where the subwoofer must be set to "on"? I've tried CD, DVD (Avia disk), TV and Tuner--no bass. Many thanks, for any suggestions.