Partly my fault. This is a 2.5mm x 2.5mm cable. If you look at what it says and the website, this is how you should connect Mixamp Pro to an Xbox controller. The downside is that they are not 2.5mm. I bought 2 adapter cables to hope it works. Otherwise this cable looks terrible and should be selling for $4 instead of almost $20. Really disappointed in Astro for not making a cable to connect an Xbox 1 controller directly to a Mixamp Pro or making it so complicated that it can't be found. I wish chat and audio worked from the controller to the amp. Pretty simple concept, especially since most people have their Xbox far away from where they actually play.