What is the farthest distance that you can be from a Bluetooth speaker and still be able to use it? I bought one that cannot respond when I am 20 meters away. It has excellent sound quality but I do not prefer to keep moving with it when in the house.
I think they can go up to 30 feet if there isn't any interference. At least, that's what mine does. I've also found something called an Amped Wireless Long Range Bluetooth Adapter that you hook into the speaker and it helps keep your system working at longer distances. Maybe you need something like that for your device.
I think interference comes in the form of walls and other objects. It might be a good idea to get the adapter suggested by Lizah though I always dislike it when I have to go out of my way to sort out a technological inconvenience.