I rebuilt this configuration as stated in the guide by Riccardo Raponi. The Raspberry Pi Zero W and the MiniAmp seem to run fine but there is no sound coming out of the speaker. As I understood, the speaker needs no extra power but only needs to be attached to the MiniAmp? What could be the problem?
Tivoli HiFiBerry Dual Alarm Speaker - Guide written by Riccardo Raponi