I wish there would be a serious discussion on caps. I have replaced and restored and re-capped lots of equipment. I now am not so sure they do anything that really helps the sound once you have decent caps installed. Now I have a shelf of oil and mundorf and auricaps and Jensen and others and I just use Orange Drop 716's for all my re-build amps. Can't say there is any real lack of quality of sound using them 2$ caps. I wish I could becuase caps are relatively inexpensive compared to other parts and if they made a serious difference it would be a great way to improve an amp. Easy to do and reasonably cheap. Alas; it doesn't seem to go that way. Could be my ears; I don't know. Maybe in the PS it works better. But coupling caps? Drops sound good to me. And filter caps; I don't hear any real noticeable difference. I am not disputing your experience; I would love to be able to justify the expense.