I would be carefull with crossovers because the Reference Series KEF produced in that era had what they called Conjucate Loading that meant excellent load curve with any amplifier, especially tubes.
I still have a pair of 104/2 biwire, only did foam on the woofers and boy do they sing.
Cheers
I still have a pair of 104/2 biwire, only did foam on the woofers and boy do they sing.
Cheers