I personally used bare wires on the speaker end and banana plugs on the receiver end whenever my system was up and running, but after researching and speaking with reliable folks I do believe that by using spade terminals or banana plugs on the speakers will not result in any loss of audio quality so therefore whenever I get my system back together I'll probably use either banana plugs or spade terminals on the speakers ... I haven't decided which type as of yet but I'm leaning towards the spade terminals.
Banana plugs or spade terminal? It's nothing more than a personal matter because both of these connection will give you the same quality audio of bare wire as long as they don't get dirty or corroded ... IMO.
