Mr. Dekkers: I have not really addressed your question about the loading of the SACD/DVD Audio player. We have reason to believe that there were
no adverse loading effects, but even if there were the experimental design removes any possible consequence.
The player we used for most of the tests was a Yamaha DVD-S1500. Neither the owner's manual nor the Yamaha web site seems to have specifications for
analog output impedance but I assume it is around 100 ohms. The CD recorder is an HHB CDR-850, has a line-level input impedance of 10k ohms. There
should be no adverse effects from this combination.
Beyond that, however, is the more basic fact that the experimental design compensates for any such effect. The CD recorder is always connected to
the output of the player no matter what the switch condition. Even if the CD recorder were to induce some small loading effect in the player's
output, that effect would be present in both sources.
The analog output of the player in the experimental setup is the target -- the ideal audio source to which the comparisons are being made. As we
stated in the article, the combination of player and the recordings sounded exceptionally good, and, it turned out, so did the same signal passed
through the CD-quality loop.
I hope this answers your question.
Sincerely, E. Brad Meyer
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