I have an Raspberry Pi 3 with an Pi-Dac+ and a Pi-Amp+ which is working great.
My understanding from the iqaudio docs is that the pi-amp+ passes the audio signal to the amp via an 8 pin header which has pins for Left, Right, and a few other things such as ground, 3v, 5v etc. Could I put a spacer between the two hats to create a bit of space, and wire the Left and Right (plus ground?) to an audio switch (like this: https://www.amazon.co.uk/HQ-3-Way-Stereo-Input-Control-black/dp/B000I8OOS8/ref=sr_1_1?ie=UTF8&qid=1516112114&sr=8-1&keywords=audio+switch+box
and then pass the audio signal back from the switch to the amp+ ?
This would give me the option to use the amp to power other inputs, e.g. line in, TV etc.
Has anyone done this? Any issues I might run into going down this route?