[Antonmb]

Since most speakers are a system, with crossovers, cabinets and drivers specifically designed or selected to work in synergy, replacing drivers with something other than the original model, or replacing crossovers, will produce unpredictable results. You're likely to end up making things worse rather than better. Even wiring, unless carefully selected to match impedance, capacitance, etc., could have a deleterious effect. If you're an experienced speaker designer/builder, go for it - otherwise leave it alone and enjoy.