I have a design of an audio amplifier. It has some special features but basically it takes in an audio signal does some filtering, and amplifies it through a class D amplifier chip. The chip says it has a 1.7A max current draw, sound played will be music or some signals. I want to power it with 4 AA batteries.
My question is, what current do I use in a mAH/current equation to figure out how long my battery might last. It's not a constant 1.7A since the music played will determine output current.
Also, are there other special considerations for battery life of an audio amplifier?