I came up with this question because sometimes people make changes to their gear without first realizing its potential. People may not realize that tubes can be changed, or that a number of other factors could either be optimized -- room, electrical, etc.
Some, like @ghdprentice haven't made mistakes -- they do their research and only move cautiously. The question of this post isn't for the non-mistake-makers, really, but I like the description of his process.
@mapman mentions, truly, that good sound is largely very subjective thing and uncertain. The question doesn't presume otherwise; I'm asking what mistake *you* made and then realized it was a mistake for *you.* In other words, the issue of objectivity isn't invoked by the question -- or at least that was not my intent.
Some, like @ghdprentice haven't made mistakes -- they do their research and only move cautiously. The question of this post isn't for the non-mistake-makers, really, but I like the description of his process.
@mapman mentions, truly, that good sound is largely very subjective thing and uncertain. The question doesn't presume otherwise; I'm asking what mistake *you* made and then realized it was a mistake for *you.* In other words, the issue of objectivity isn't invoked by the question -- or at least that was not my intent.