When i said power is irrelevant i didnt mean it literally. Powering components with a HU amp is just silly. Im talking more comparing 100rms to 200rms.
I have a pair of old Diamond Audio components (M300 i think) being powered by a JLA 5/500 (100rms to front speakers). I have my tweeters installed in my door vents. Its pretty easy to simulate what they would sound like if the tweeters were in the door by simply placing my hand between my head and the vent (not over the vent)...and it is a noticeable difference...sounds way more muffled.