bi-wire cables on single binding post, sonic loss?

Thanks for the responses. Just to clarify a few things that led to confusion:
The pair of cables I have in mind has 2 spades on one end (amp) and 4 spades on the other (speaker). I will double up the tweeter and woofer + spades to connect them with the single + binding post of the speaker (and accordingly for the -).
In doing so, I am not trying to achieve bi-wiring benefits with a speaker that sports a single wiring terminal. I'm aware that there can be no separation of the signal.
The thing is I would like to try these particular cables, that happen to be available as a bi-wiring pair only, in my system in a single wiring mode but I'd like to save the cost of having them redone for the moment (the latter would be the better thing to do, surely)
I was just wary of negative effects that anyone might have experienced to be a show-stopper.
Thanks for any additional thoughts.

Gulp ..., the Truth about cable sound has been revealed. Talk about skin effect and stuff, whilst all the time it's really the Bananas romping through our systems, chuting down the silver cable cores :-o

Apart from which, thanks for all your input guys.