I don't need to prove you wrong. Your research has obviously skipped out a few key factors but that's okay. Rest assured, come over and I'll hand you a authentic 5230 for under 30k brand new. You can verify the product from nakamichi and ask why they don't provide warranties in pakistan
End of the day, it's important that you're happy with your purchase. The factory speakers are not bad but can't be categorised as good. They're meant to be sensitive so they work with little power. It's only when you raise the volume you'll start noticing the lack of details. But car audio is a never ending journey. Live in the moment and enjoy your current setup