Spotify - how to add 2nd pair and play music through both

[MountainGuy]

I'm testing a 2nd pair of Phantoms in a 2nd room.

With Spotify, I can only select one pair to play in one of the rooms. 

Is there a way to get: 
1. The SAME music on both pairs. 
2. Control both volume independently? 

Thanks!

Sure. Open Spark, go to Rooms, drag another set of speakers to room with Spotify

Dmitrek,

Hmmm.....I'm normally technically adept but at this point, I am not understanding your instructions. 

1. Spark in which platform?  I have for Windows computer, and for Android phone. Both are latest update. 

2. In Android, I see 'rooms', but don't understand how to drag speakers to room with Spotify. 

3. In Windows computer, I don't even see the room selection. 

Thanks in advance for any help.