There is a certain semi-conductor I do believe undergoes burn in, but as an exception to the rule. And I seriously look forward to yours, George, and Al's comments on this. I've brought up the offset and bias trim pots which are variable resistors, on a couple of other threads but not in regards to this topic. I'm suggesting that because they are always adjusted after recap/refurb, that the perceived short term progressive improvement heard even with new gear is a result of the wiper contact on the pad of the trim pot 'seating' and thus improving it's contact point until optimal and it is this action that is being tracked sonically by the user. The change is real but simply mis-attributed to stationary components. I regularly experience this phenomenon. It's easily observable and you George may be able to relate to this as the same issue pertains to basic mechanical attenuators. The very issue your own product addresses. On a single turn trim pot where you have direct contact with the wiper against your screw driver, you can press on it at the point of correct adjustment and hear improvement. Leave it alone and it will slowly reach that same quality over the short term. I incidentally noticed this a long time ago as another position I hold on bias adjustment requires that I do that procedure while listening. Sq has always continued to improve for up to a month or so after I adjust offset/bias pots. I'm thinking this has to be some how measurable. Without knowing the specifics as I don't recall the text, volume pots have contact issues such that optimization is apparently next to impossible and I'm hoping George can speak on this.
