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<p>[QUOTE=&quot;Marsden, post: 8320245, member: 38010&quot;]Thanks very much for doing this work at your own expense Adam. Very informative and useful. Clearly the difference between &quot;SUPERB+ GEM BU&quot; and &quot;SOLID GEM BU&quot; is bigger than I thought!</p><p><br /></p><p>And I did think that NGC was being overly harsh on the second coin but now I guess I do see traces of wear in a couple of the usual spots.</p><p><br /></p><p>But would I have seen them if I hadn&#039;t been told?</p><p><br /></p><p>Another pursuit of mine is audio. In that field we insist on double-blind testing because the power of &quot;confirmation bias&quot; is so strong. That is, unless the information is kept from you, you&#039;ll be certain that that Accuphase amp really does sound better than the Pioneer. Well, it <i>probably</i> does.[/QUOTE]</p><p><br /></p>

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