monkeybanana
Friend of Leo's
I think some winders do degauss magnets to make it more "vintage".I do not have a gaussmeter, so I can not give you empirical evidence but I hear no difference in pickup volume whether north or south. I will say that these magnets are very strong and from what I understand, give the alnico rods a full "charge".
In my 37 years of guitar playing, including many vintage guitars, I have never heard of or know what a "strident sounding" pickup is, let alone know of it having such characteristic because of pickup magnets that need to be weakened. Lower the pickup if it means that the pickup is too strong?
New pickups are magnetized by passing them between magnets. Do pickup manufacturers test the pickups with gaussmeters after magnetizing the pickups?