Today I had a play with Pearl Harbor DVD on these 2 settings. 1.Dolby Digital 5.1 via Optical lead in CD/DVD mode. 2. 6 Channel input. Coaxial IXOS / Phono leads, I guess? My set up is Kenwood 5030 amp Toshiba SD 520E DVD/ DVD A. Paradigm sub JPW minims Fronts Wharfdale Flat Panels as Rears. Gale Centre 10. I thought the DD Optical sounded Fuller and the sub lit up the LFE light in this mode. 6 channel the SW mode lit up on the amp not LFE. The sound seemed inferior. On the CD/DVD setting on the amp no sound was heard with the optical lead disconnected, so what does the coaxial do? One thought I had was, with both an Optical lead and a Coaxial lead attached to the DVD and Amp what lead would the CD/DVD and amp need/Use. I've read on here before the people recommend Coaxial v Optical connections so I'm a bit at a loss of what direction to take/ understand how to get the best sound. All the best. Rich Tee.