According to one aspect there is provided an audio system 10 comprising a transmission unit 100 and a plurality of speaker units 110-1, 110-2, 10-N, wherein the transmission unit 100 comprises a controller 101 and a wireless communication interface 103 arranged for communication according to an IEEE 802.11 standard (WiFi™), wherein the controller 101 is configured to: receive an audio data package to be played back; and to transmit the audio data package to be played back over the wireless communication interface 103 utilizing the same protocol for the transmission of the audio data package and for synchronizing the playback of the audio data, and wherein each of plurality of the speaker units 110-1, 110-2, 10-N comprises a controller 111, a PCM 111-1, a speaker element 114 and a wireless communication interface 113 arranged for communication according to an IEEE 802.11 standard (WiFi™), wherein the controller 111 is configured to: receive the at least one data package to be played back through the wireless communication interface 113 and to cause audio represented by the received audio data package to be played back through the speaker element 114 by feeding the audio data to the PCM 111-1 being connected to the speaker element 114.