I am not a big fan of 6X9 speakers because they are oblong and will distort sound more than a round speaker. How many home speakers do you see that are 6X9?

Back in the day it was worse because some were 4X10.

Regarding power, it is the low frequency signals that need large amounts of power. If you have low power capability but run the system loud you distort the ampifier
which will generate harmonics which are high frequency by nature and risk burning your tweeters.

That is why it is better to always have a lot of power not because you are going to play it loud but because you can crank it up, have clean sound, and not worry
about destroying your expensive tweeters.

As your friend about how his 500 watt amp is divided up amongst the speakers?

I laugh when I see guys pull up at a red light playing their ghetto subwoofers in their cars. You can tell it is distorted because he either blew the cone or because the underpowered amp is crying for help. Oh yeah, he probably plays it loud all the time now because his ears are almost blown too.

Remember, you only get 1 set of eardrums in your life. Whey they are gone, they are gone.

Honestly, I think they need to up the power on the Challenger. The 322 Watt is certainly on the week side. My sons Mustang GT has a 1K watt sytem.