Originally Posted by Doc99
Yes...that is what I did, but you can not unscrew the cap completely off by hand. It is way to tight once it unscrews past half way. For some reason, they made it this way,
yeah.........the binding post's on the previous C-Series (ie. C-1's. C-3's, C-5's, etc.,...) are probably designed slightly different from the [new] C-Series (I sold my C-1's, C-3's and C-5's, so I'm going by memory).
If I remember correct, these previous models have a plastic shroud around the end-screw cap? This end-screw cap should have a center hole on the outside, correct? Well you should be able to insert a banana plug through the end-screw cap hole (from the outside), with the end-screw cap completely hand-tightened. Try this out.
Moreover, there may [not] be a problem with any plastic plug insert with these previous C-Series binding post's, so don't worry about un-screwing end-screw cap.
Once again, the [new] C-Series binding post's do [not] have a plastic shroud on the end-screw cap, and [do] contain small plastic insert/plug's internally. Consequently, you have to un-screw the end-screw cap, remove the small plastic insert/plug, replace end-screw cap (hand tighten). Then insert banana plug through (outside) hole. Straight forward, simple.
Otherwise, I would use spade lugs, actually they provide a better, more efficient, surface contact. I prefer the Monster "QuickLock" Gold Spades (Part No. QL GAS-B, or QL GAS-H), these work wonderful. You can find these at Best Buy.