try Cardas rohidium binding posts they work excellent for me.
Speaker Posts
In my 12 years as an audiophile audiogear lover, I have gone through over a dozen speakers. Not one has binding posts that fit well with speaker cables spades!! Ive spent nervous hours trying to expand and bend speaker spades so that they make a nice fit into the binding post. I only hope that one sunny day comes where speaker designers and speaker cable makers have a world summit to get it right once and for all.