In my continueing quest to get the monsters out of my system, I switched to an optical cable from Outlaw Audio to connect my Denon 910 to my Yamaha HTR-5790. I could not believe the difference in sound quality, like night-and-day! I have been trying different analog IC's, and there are differences, but nothing like the change in sound when switching optical cables. The Outlaw optical cable has a much more open sound with much clearer high-end, and better mid-range for the voices in the soundtrack. The other difference I noticed is that I have to turn up the volume about 2 db more to get the same sound level, but the sound quality is much improved. Maybe this kind of difference is normal, but I sure didn't expect it!