Stock Stereo Amplifier location?

I have a 2016 Cali T with apple car play (Base, Not Hi Fi)

Is there a separate amplifier for the speakers? or is it built into the head unit?

I cannot seem to locate this info in the Documentation.

 

Well I spent my free time today looking at schematics and such and have found there is indeed a non-hifi amp located somewhere possibly in the trunk. I will upload an image showing the approximate location.

However, before I go nuts and completely disassemble the trunk of the car, does anyone know its precise location?

I figure if I upgrade the amp and the speakers alone, that might have a significant impact on the audio system.

Also if anyone has any suggestions to speakers and amps to replace it with, please do. I do not see the need to go crazy with hi end here because I am fairly certain that there is no real good way to create a hi quality sound stage in this car.
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