Review on High-Quality Fancasee (3 Pack) 6.35mm Replacement Repair Plug Jack TS 2 Pole Mono Male Plug 1/4'' 6.35mm Solderless Terminal: Ideal for Microphone and Speaker Audio Cable Repair by Tara Greene

It couldn't be easier to attach. No soldering required, quick and strong connection. I have several portable systems that I need to install in different locations on campus. Some of the speaker outputs are 6.3mm while others are bare wires. These connectors allow me to quickly switch between them without having to carry around different sets of speaker cables. I immediately bought more and kept the extras in my kit.