I think there may be something up with the wireless hardware in my Xbox One. When I'm wired I get connection speeds of 13 - 15 Mb/s, but on wireless it's a pathetic 1.5 - 3 Mb/s. I know that wired will always be better than wireless, but the difference shouldn't be that extreme, and I've never had issues this bad with any of my other devices.
It's been like this since I got it, but I'm getting tired of running a cable across the house whenever I need to use the system, and it certainly feels like a defect. How do I get a professional to check this out?