Power amp/speaker Banana Jack adapters, 14 AWG(OFC). New Set of 4 wires. To see other Stereo Equipment I have for sale, type "RSTEREO" in the search box above. Do you have a power amp or speakers with no banana jacks, but you'd like to use speaker cable terminated with Banana plugs ? This connects to your amplifier speaker connectors or speaker terminals and then you plug your speaker cables(banana) into these adapters. Wire: 14 gauge Oxygen Free Copper. Connectors: Silver plated Banana jacks. These are soldered with silver solder. Overall length: 7 inches.