Hey Alex,
You need active speakers with build in amplifiers. There are models with volume control on the speakers. All speakers need to be connected to a mixer. You connect your music source (computer, dvd player etc) to the mixer and you have sound in all zones which can be regulated.
You can buy a mixer for about 300$, speakers will cost around 80$ each x 5 makes 400. 200 meter cable will cost 50$..add another 50$ for connection elements..so in total it will cost you around 800$..
I am not an expert..just my 2 cents..
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