Best Sounding Adapter - Making RCA into Banana or Spade? Thanks!

Maybe I'm thick, Drinking my first cup of coffee today with Boz Skaggs, but I think we need more info what you're trying to do.

Jerry

If for speakers, bare wire is best. 

The cable will connect an integrated amp (banana or spade) to a subwoofer (RCA).   The cable is RCA both ends.  I want to avoid cutting off the RCA at one end and so use a banana / spade adapter. Thank you for your help :-)