Antman27,
I am not familiar with the Denon 3805 surround processor. I assumed that for two channel music that you program this Denon amp to send the audio signal also to the subwoofer as well as the left and right channels (many surround processors allow this option). If this is not possible then my suggestion to try a beefier sub woofer (PDR 12) will not help you at all with your music... in this case you might want to look at a surround processor that does allow you to drive your PDR 8 when playing stereo source music or, alternatively, larger front speakers with more defined base reponse (usually means larger cones and may unfortunately be much less esthetic for your room).
I am not familiar with the Denon 3805 surround processor. I assumed that for two channel music that you program this Denon amp to send the audio signal also to the subwoofer as well as the left and right channels (many surround processors allow this option). If this is not possible then my suggestion to try a beefier sub woofer (PDR 12) will not help you at all with your music... in this case you might want to look at a surround processor that does allow you to drive your PDR 8 when playing stereo source music or, alternatively, larger front speakers with more defined base reponse (usually means larger cones and may unfortunately be much less esthetic for your room).