I don't get it.. it says 12-18V is recommended (A not specified) connecting directly to the Amp unit
and it also says that no micro-USB power is needed to the RPi itself.
Yet - a 5V/2A micro-USB powersupply is recommended
So as I understand it I can use either
1) 12-18V directly to Amp (but how many A ??)
2) 5V/2A directly to RPi, no powersupply needed to Amp
A little confusing I must say!
What power supply to Amp/RPi?