Fill The House With Music Via Smart Phone

[THAIPHUKET]

I like to sit in the garden listening to music like this exciting piece on youtube

I use an active loudspeaker box connected to my HCT smart phone and stream from the wireless router.

Sound is totally ok.

Question: as there are several Iphones/smart phones in the house, can I use these simultaneously to fill the house with music?

Leaving aside the acoustics of the house, there should be no sound sound delay, or other distortions, right?