I am looking to power Four audio amplifier (TDA2030A) and Four mic amplifier with one power supply

I have no clue where to start 1) should i wire it in series or parallel? 2) how many amp should the power supply be? 3) should i use one PSU or two PSU? 4) how many amp should the PSU be? 5) if One amplifier circuit Blow up, that would increase the current go to the other amplifier, would it damage the other amplifiers?

Audio Amplifier TDA2030A:http://www.componentschip.com/details/ST/TDA2030A.html