Suitable for AV receiver for the best grip and power to the speakers. The special feature can be locked and you always are the best quality and performance of the AV receiver to the speakers. Do not be scared to have the banana plug is not properly since it is always securely locked and suitable cable just for thick loudspeaker. Provided screw installation banana plug and cable with two plus a special screwdriver included and a good grip. You can also connect up to the banana plugs nor a banana plugs such as for bi-wiring. Fast delivery and shipping.