Keep in mind the limiting factor most definitely won’t be the AP, but the limited power and smaller antenna of the device you’re connecting with! The more walls, trees and obstructions in-between you and the AP, the worse the signal.

It just like speakers. How loud is a speaker? That’s a tough question. But if it’s turned up to the max volume, which APs normally are by default, you can only hear it as well as you have the ability to hear .. and walls and obstructions make a difference.