Bought the AMP2 kit. Pretty worried when sparks came out of the power socket when plugging it in but HiFiBerry support said it was normal given the strength of the capacitors. :-|
Was having problems getting sound out of the Volumio 2.
The green LEDs on the AMP2 board don't light-up, which is a give-away even though you can logon to Volumio and manage the raspberry pi
Did a factory reset. Several times but still no joy.
So used the following settings in playback settings and rebooted... and it all worked. Ta Dah! Why don't they tell you this?