A banana conector is a standard connector, for speaker outputs a double banana conector is used. You can get them at Radio Shack.
I use them for quick setup and take down on my portable PA system. Most AV recivers have what is called a 5 way binding post. Yes they will take banana plugs and bare wire. For my home system I use the bare wire option an lock the wire in. Banana plugs are easly pulled out, Ok for temp setups. john