I am now looking to improve the 4" high frequency drivers.
I have available vintage Alnico drivers including Saba, 'small' magnet Grundigs, larger magnet Grundigs and my latest purchase is a pair of Klangfilm drivers. These have BIG horse shoe magnets (see picture)
If the weight of drivers correlates to the weigh of the Alnico magnets there is an interesting comparison.
'Small' magnet Grundigs 236gm
Larger magnet Grundigs 330gm