Single-wire spades from amp to biwire spkr posts?

Thanks for that Sfar. I may look into that with my Cardas GR.

Thank you for that. I will do some more research.
From the photos I looked at on some major cable websites,
I only saw biwired cables with 4-wires on each end of each cable. I didn't see an internal biwire option,
or any distinction between bi-amping and bi-wiring.

I just hate stacking spaded-connections on one post.
When I did that once for jumpers, they would occasionally
detach themselves.

Mitch--thanks for all that info! I do have the Cardas jumpers,
so I'll try those. I know that there are several discussions here about how to orient the jumpers, and with my former Von Schwiekert speakers I had better results with the stacked spades on the LF terminal, contrary to most things I've read (clearer, less foggy bass; highs were fine and liquid with that nice VSR Revelator tweeter). The problem is I have a long run of speaker cable (> 20 feet), so new cables are expensive, and my Cardas are well broken in (I've had them for several years, and I bought them new) and I hate to let them go. I'll take a big loss if I sell them. So I'll see what I hear with the jumpers. Thanks again to Mitch and everyone else who chimed in here.

Yep, it is conceptually messy as long as thing come together at any point, but I'm no electrical engineer here. I was told to avoid internal biwired cables. Any thoughts? Thanks.

OK, thanks for that again.