Interesting. I recently ordered speaker cable (Canara 4S11) terminated with banana plugs from BJC. The cables are secured to the banana plugs using sonic welding so there are no set screws. I had a hard time pushing the plugs in to the back of the amp and speakers (Mcintosh LS360). After using some Deoxit, plugs went all the way in at the back of the amp and one of the speakers but only about 1/2 way in for the other speaker. I don't think it would make a difference, but I suspect that their plugs may be just a little thicker than usual. In my HT room, I have the Axiom cables terminated with Atlona banana plugs and they slide right in (in fact, one can just "drop them in").
