I had been happy with a TEAC VDRS transport and the rDAC. The Teac has been to the shop twice in the last two years, and I won't send it back again, so it does not seem to be the tubes or the rDAC. The transport on the Marantz does not seem to be up to it.
I have been using the coax out. I will give a try to the optical out and see if it makes a difference.
Thanks for the responses and ideas.
After the problems I have had in the last two years (first the Jolida problems and then the TEAC) I think I need a warranty.
Most of my equipment has been purchased used in the past with good luck, but I am not in the mood for problems right now.
If I go used, what brands are most reliable?
From what I see, NAIM is high on the list, and Cambridge seems to be low.
Is that correct?