It's just the weaker magnets. You don't see a lot of A2/A3 JM pickups these days, but that's 100% what's going on with those. The only aging they do that isn't cosmetic is to mildly degauss the magnets.Nick and the Noise wrote: ↑Thu Aug 19, 2021 2:06 amSince the boutique trend, Antiquities are quite underrated. There's something about that ageing process that makes them sound balanced and round in the lows yet soft and pillowy in the highs.
I think much of the reason weaker magnets are less popular than full strength A5 is that 1M pots are less universal on JMs than they used to be. Many people who swap pickups are also the type to try lower value pots, and many Offset models come with lower pot values to begin with now.
Degaussed or inherently weaker magnet types have a less sharp high end, and lower value pots accomplish a similar functional end, though they're not the same thing sonically or ectrically.
But for sure, A2 or A3 Jazzmaster pickups are underrated. I had an AV65 that came to me with antiquities and I didn't like them at first, but found the sweet spot on my amp eventually and they came to life.