What size of banana plugs should I use? April 03, 2024 16:35 4mm Banana Plugs are recommended for use when connecting to our Amps / Stereo Receiver's output terminals. Related articles What Size Banana Plugs are compatible? Why can’t I adjust the volume of the CXA61/81/81 Mk II with my mobile device when connected via Bluetooth? Where can I buy a spare remote for my CXA? What would the power output of the CXA be if I connect two pairs of speakers? What size of banana plugs should I use?