It always bugged me that I had a 'late' Cyrus 2 amp but an 'early' PSX (bought separately). So I sold the pair on eBay, and for a reason I've not yet been able to sufficiently explain to my wife, I bought a matching pair. Both late ones this time, in black. They look classier in black imo instead of easy-peel Nextel Grey, plus the black matches my late Cyrus tuner, so I'm happy with that too.
What I didn't expect was any difference in sound, but there is. The sound from this Cyrus 2 + PSX combo is warmer, more enveloping and less 'thrown at you'. I know: you don't expect to hear the words 'warm' and 'Cyrus' mentioned in the same sentence unless it's a thread from someone panicking that his amp's just gone up in flames, but there you go.
Got me wondering if these differences are because of how the equipment has aged differently or whether they would always have sounded different.
And if they've always sounded different, then obviously some of the component tolerances are a bit too free-range, leading to noticeable inconsistencies.
I wonder if this variation from sample to sample is still possible today, in an age where everything's designed on computers and/or built with microchips made to (presumably) tighter tolerances?
Food for thought, no?