What size banana plugs can be used with these speakers? 1 year ago Our speakers use terminals compatible with standard sized 4mm banana plugs. Related articles What’s Included in the Box? How do I install the SX-50? SX-50 Manual Where can I buy a spare remote for my CXA? What is the best way to connect my CXC, CXN V2 and CXA61/81/81 Mk II?