I would recommend revamping the crossovers with better components. The design is quite good, but the crossover could probably use upgraded caps, coils and resistors.
Upgrades to kef 104/2 - recommendations
The kef 104/2 are one of my favorite speakers. They have certainly passed the test of time, Many speakers have tried to copy their designs and philophies,but have failed in their ability to replicate the quality of cabinetry and crossover design that these speakers possess. Unfortunately time is not on their side. I am interested in any upgrades that individuals have made. Any comments or experiences one might want to share would be appreciated.