I owned those amps. Stupid design on the WBT binding posts. I have a higher model WBT on my Clayton amps and they do not have the stupid plastic housing. What I did when I owned the 500MBs was to carefully cut the plastic housing off of the metal posts - problem solved. The buyer I sold them to was fine with that.
Spades or Bananas on you Cary 500's
A question for Cary 500 mono block users; are you using spades or bananas on the amp posts? The posts have that irritating plastic safety cover offset to each side which means any spade set must have a rather large split or they won't reach. Also, the spades have to be just the right size or they will not fit into the slots. Maybe bananas are the way to go??? Which way did you go?