Components/volume/audio things

[Tom]

How do you get more volume from components without them just distorting?
Friend if mine has an active sub and some amped 6x9s in his focus and they go way louder and sound better than my setup.

I have amped alpine components up front and amped vibe components in the shelf, they all run off of one kenwood 4 channel amp.

Would a bigger better amp give me better quality? No point going much more power because the components are rated to around the same as what the amp is kicking out rms (cant remember numbers off top of my head)

Thanks all