I own a Sony DVP-NC650V that IMHO sounds wonderful when playing SACD. What types of substantial modification would be required to make this unit sound better than 'mediocre', as you so gently put it?
Sorry, I didn't mean to offend anyone here, was just trying to offer on honest opinion based on my experience on the subject. I have not heard your particular unit, so I cannot comment on its sound, other than to say that a friend of mine who had one was not blown away by its sound. But I can say that all of the lower-end Sony that I have personally heard, I have not been overly impressed by their sound, in stock form.
Now I say this as an owner of a Sony C-333ES SACD player, which was itself a lower-end offering by Sony in its day. Mine stock sounded, well, medeocre (sorry, but this is the truth). On SACD, it
did sound very nice indeed (but certainly not superb), but on Redbook it got its socks
completely blown-off by my old CAL Alpha DAC! I also tried out a C-555ES in my system, and I felt that it sounded, dowright "hard" and unpleasant (my wife heard the exactly same thing, and she liked it even less than I did, and was literally relieved when I said that I would not be buying it).
On my Sony, I installed the VSE mod
http://www.vacuumstate.com/various/SACD_2005.pdf designed by Allan Wright. Wow, what an amazing improvement that made!!!! This unit now sounds roughly equal to my CAL on Redbook CDs (and that is a BIG complement in my book), and it is now at least a full level beyond my CAL when I listen to SACDs!
There are
many different mods out there for Sony SACD players. Richard Kern of Audiomod does many SACD mods, and there are pleanty of others too. If you have never lived with a really superb CD player, then I can understand why you would question my judgment on the sound of the Sonys. Because without hearing a player on your own system that blows it away, I could understand how you could think that it sounds pretty good.