hi, i dont know if im posting this in the right place, but i want to buy a diy amplifier board but i cant for the life of me figure out what kind of power supply i need. it has 2 ac inputs and the product page says (i've attached a picture) that you can use a dc power supply or a dual ac power supply, but it specifies that you need to use a three prong one, but i really don't know which power supplies they're talking about. i assumed you can just ad a ground or attach minus to ground and plus to one of the ac inputs? please help. oh and by the way the chip is TDA7294
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