I am currently looking for a multiroom speaker system which does not force me to place wiretap into my home. Also it should be able to simultaneously play the same song on multiple speakers. Which device can you recommend me? Best would be if no additional internet connection is necessary.
What I’ve done recently is grab one of the bluetooth FM transmitters for cars, that let you connect your phone and it broadcasts that onto a FM radio station.
They actually reach a lot farther than you think. Now any FM radio in your house will be perfectly in sync, and as many as you want. This has a limit depending on how thick your walls are but they’re cheap as hell and work well.