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In Reply to: RE: HF-81 with CDs posted by akolegov on May 18, 2015 at 07:52:47
This would not be my #1 hypothesis, but is it possible that the output of your CDP is setting the HF81 into oscillation? Especially SACD has some very high frequency hash that is filtered out in many SACD players, but not all. For example, my Ayre C5Xe is not useable with my Beveridge direct-drive amplifiers; it drives them to nasty oscillation. Ayre conceded to me that they deliberately do not use a high-pass filter on the output of their SACD decoding circuit, because in their opinion, it sounds better without. In contrast, a Sony SACD player which does use a hi-pass filter on its output, works fine with the Bev amplifiers on SACD.On balance, though, I favor EStat's hypothesis.
Edits: 05/22/15Follow Ups:
There is no such problem with my Eico ST-40 and Sansui AU-517 (which is my favorite)...
It may be...However, good quality CDs don't distort with HF-81.
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