Listened to my system last night, and it sounded most excellent, and I enjoyed playing it loud, hearing every detail in the music, but I was tired and fell asleep. Came in tonight after quite a relentless day at work but not particularly tired, and turned on the self-same system in the self-same room. Just not the same. Sounding lifeless and not 'shimmering'. Hearing every defect in the recording. Drank a beer while listening. No difference, not enjoying it at all. Paused it and went away for a coffee. Came back and started it up again. Ah, much better! On song again. Whether that's because I wanted it to be, or the caffeine kicked in, or I finally wound down after work, or a bit of wax in my ear got dislodged, I don't know.
It occurs to me that were I some sort of hi fi reviewer, my opinion of the sound would be quite worthless. Were I some sort of audiophile I would be feverishly propping my cables up on ceramic supports and stacking CDs ready for the freezer. But as a would-be objectivist I'm fairly calm about it, and know that I really can't trust my ears at any particular instant, except for the really obvious stuff. Beyond that, I'll choose the equipment with the best measurements (solid state amp with adequate construction and sensible design, active speakers etc.) but be open to plausible suggestions that it can be improved upon, keep an eye on new ideas for measurements, room correction and so on.
My question for the subjectivists is: do you ever find that your system sounds radically different from day to day even though you haven't changed anything about it? If the answer is no, then I'll just have to accept that I am bumbingly inadequate as an audiophile. But if yes, you must surely wonder whether you have ever actually discerned anything real regarding 'presence', 'soundstage', 'focus' etc.
Some immesurable inadequacy in the power supply. Re-wire the house. If the electricians bill doesn't make it sound better nothing will.
Tim