Want to put together a whole house audio distribution system with raspberry pi using 1 Pi per zone, am using the wolfson's audio card to get better audio from the pi, squezeelite and WAC (for wolfson's audio card) are working great, can play from my phone, from a tablet or from my computer (set up and working as we speak), so to drive the loud speakers (10 W per channel at least) do I need an amplifier in between the WAC output and the speakers or can I connect the unpopulated speaker out from the card directly to the speakers
