Jim, any regular sized banana plug will fit into the the Magnepan terminals. If you tighten them down, they might ruin the banana plug a little. You just need to be sure to back the set screw out all the way.
Magnepan sells an adapter to use spade lugs:
http://www.audioasylum.com/forums/MUG/messages/12/123297.html
http://www.audioasylum.com/forums/MUG/messages/12/123298.html
The reason they still use these terminals is because the best connector is no connector and if you can use bare wire, these terminals are fantastic. And because they need to ship the speakers as flat as possible and regular binding posts would be stick out to far. The factory posts can be, pretty easily, replaced with regular binding posts if you want.
I agree that most audiophile cables will have terminations, but again, if can use bare wire, these work great.
Magnepan sells an adapter to use spade lugs:
http://www.audioasylum.com/forums/MUG/messages/12/123297.html
http://www.audioasylum.com/forums/MUG/messages/12/123298.html
The reason they still use these terminals is because the best connector is no connector and if you can use bare wire, these terminals are fantastic. And because they need to ship the speakers as flat as possible and regular binding posts would be stick out to far. The factory posts can be, pretty easily, replaced with regular binding posts if you want.
I agree that most audiophile cables will have terminations, but again, if can use bare wire, these work great.