But what temperature is 'right' - and in, for example, an amp with different brands of capacitor and resistors how do you know when they are all 'on song' at once? If a speaker designer optimizes his design does he do it after it's been cruising at 10w, 50w, 200w.....etc ? I think there are too many variables, not enough hard evidence and uncertainty over the audibility of these effects. I don't dispute that speakers will perform differently in different climates but with electronics you should be able to switch on and enjoy within minutes.