Spade will be more contact and a better sound, plus banana's contact is not as tight as spades, since spades you will have to screw it all the way in order to keep it tight, so it will be better and a tighter contact. Spades also uses less cheap-metal/copper (Sounddegrading) materials than bananas, and the resistant is lower than bananas since it has less metal. Bare wires is the best, but almost all speaker cables are stock terminated. One thing, if you have a extremely stiff cable you might want to use banana instead, I ordered my XLO with banana beacuase they are extremely stiff and once they are sharply bended the copper crystal inside will crack and it will sound like crab, so, I rder banana to avoid sharp bend or snap off situation.