My Meadowlark Kestrels have the all time worst factory spikes, an obvious afterthought, especially in view of the otherwise wonderfully crafted cabinets. That said, I simply put 25 lb. bags of lead shot on top of each speaker and Newton's third law on a leash. Big improvement in image and bass clarity.
Cones vs. factory spikes?
Has anyone done any A-B testing for various speaker cones? Currently, my KEF REF 4s (120 lbs each, ported base) have the factory spikes. Before spending big bucks on Orchard Bay cones (used on Talon Khorus and recommended by my dealer) or Black Diamond Racing (why is their web site is abysmal?), I would like to know what others have used on the bottom of their speakers and if they make an "audible" differnce. Rest of system (for 2 channel) is: Aranov tubemonos, firstline pre, Sony SCD-1 (on order).