Update on my idea. I finally nailed down exactly want I want to do for my first system as I am planning to do 2. The first system will connect to a external amp I have been currently using. The second system will be a a self contained system. There are a few things I still have to decide on but this what I have so far. I will using a Raspi B with a BerryNOS Red I2S DAC. I am figuring out exactly how I want to the external of the case and its aesthetics. I want something unique, useful, but does not standout(to much). I hope to start getting parts soon and start nailing this down. I may create a new post under the DIY section for this project, it depends on how abtious I plan to get. Hope you all enjoy this as I reveal more.
It was a surprise to see that I'm not the only one doing this type of projects
I've been playing with various TPA3116 (and TDA7297) chip amps for more than a year now, and I've been working on a RasPi server for a while.
My idea is similar to what has been described in this thread, but for mine I'll use a ready-made enclosure: an old cassette deck So far, the project is still at the beginning (working on improving the software side of things), but I have already built several RasPi audio servers - in discrete components, i.e. as a separate RasPi+DAC server, a separate TPA3116 amp and an external USB hard disk with music library. The next iteration, a pet project of mine, will be to put everything into a single enclosure - an old hi-fi deck component. I'm still considering various options, since I'd like to retain at least some of the functionality of the front plate (buttons and switches).... We'll see
No, the 4A is not the amperage the power source will permanently supply, it's only the upper limit, how much it CAN do. So there is no danger for raspberry or anything to burn from more powerful power sources, unless there is some short or something, but in that case a weaker power source can damage the boards too.
4A is simply a limit, how much can the raspberry and the other stuff use (totally).