We're checking with our statisticians, but, yes, I think that may be a new meet record in the Standing Conclusion Jump!
Seriously, it is known that there is no such hardware fault involved in this -- e.g., swapping players won't change anything. The output is simply not compatible for direct connection to the specific power amps these folks have been trying, OR there is an external source of hiss interference which is penetrating their setup, which has not yet been identified/isolated.
I was just recalling the conversation i believe Oppo gave where they said that on some models of the 95, the output opamps had a DC offset large enough to cause problems when plugged direct into power amps, hence the change to AC coupling on the 103/105.
From the Oppo BDP-105 Wiki at http://wiki.oppodigital.com/index.php?title=BDP-105_Hardware_FAQ
The 95 and 83SE outputs were DC coupled. Why is the BDP-105 AC coupled?
The BDP-95 used DC coupled output, and OPPO found a few rare but annoying compatibility issues with certain amplifiers. Some amplifier may have a DC offset on its input and that has caused issues from popping noises, degraded sound to the audio board becoming damaged. OPPO selected the components carefully so that the AC coupled output can still produce excellent bass response. The capacitors used are high quality ELNA capacitors. Again this increases cost so OPPO did not make this kind of design changes without a good reason. For the unbalanced RCA stereo output, OPPO hired an audio consultant who developed a certain way to bias the components so it actually sounds and measures better than the BDP-95, but requires an AC coupled output.
Overall OPPO believes that the BDP-105 sounds slightly better than the BDP-95 due to the many design changes made in this product. In the end, one has to listen to the player to draw a conclusion. When OPPO first got the ES9018 reference design board a more than two years ago, it measured extremely well but sounded completely "dead". OPPO almost decided against using it and went back to the ES9016 until OPPO actually built our own board to test and found that the ES9018 was indeed better. Audio engineering is a combination of craft and science, and sometimes what is good in theory does not translate to good sound. OPPO's design decisions are based on many years of collective experience from their engineers and consultants, as well as test results from many revisions, and never based on cost reduction.