Other than that usless review from "danny" or who ever it was, I did my best to find the end of the internet to find a review for these speakers, and was only able to find 1 review on them...one.
SO...as i was about to do some research on a diffrent pair of Quarts, I stmbled upon that said one review and it was great, so i said screw it, ill buy them, and im glad I did.
They sound great, and they have a good quality feel to them. I have these powerd by a Alpine PDX 4.100, Audio Control EQS eq, and Pioneer AVIC-F900BT. So with all this, the speakers are alive.
I had a friend get in the truck while i was outside of it, cranked it up, was never distorted, and once i put my head in the truck I was suprised how loud it was (hence the clean sound).
I find that when I'm in the truck with it cranked up, i dont notice how loud it is since its so clear, I almost have to yell to talk, and my ears are ringing once i get out.
Im not educated enough to talk about hz or other random audio talk, I just know these sound great, and thats what I was going for. I allready had an upgraded sound system (stock) in my truck, and I didnt NEED to upgrade them, but I wanted to finish it off and I didnt know how much I was missing.
If your on the fence about the Quarts because yes, they did get bought out my Maxx Sonic or what ever, know these do still sound great. I will say, Ive heard other sets of componets in a sound room where when the tweeters hit, I would automaticly blink my eyes from them being so powerfull, I dont have uncontrolable blinking from these, which is ok with me, but I have also yet to fully tweak the EQ. But when i put in a Cd from a band like 10 Years, or Framing Hanley, I can hear every instrument come alive, and Rap even sounds good, (Kanye West, Lil Wayne cd's just purchased).
Hope this helped atleast a little.