I listen to 70%music 30%movies. My reciever manual says if you speakers go below 80 to set them to large. It has a different bass setting where I can set either 'subwoofer only THX' or 'Front and Subwoofer'. The manual says set it to 'front and subwoofer' if you have front speakers that go down to 20. I have also biwired my fronts and that seems to produce more mids/highs. It's not a huge difference but my wife and I both can tell it's a little more defined.