Because naked cable is as unsightly as Janet Jackson's breast, and it will oxidize. Spades and bananas will not oxidize so the signal won't be degraded.
odd binding posts won't fit spade or banana do i
strip one end of good cables and stick em in? there is a hole to the left of the binmding post to insert speaker wire. i don't think it'll fit a spade. am i gonna lose a TON of sound? please help! cables are pricey and i don't really wanna strip em. is there another option?