i was looking to replace my kicker ds 6 x 9's the midrange is almost non existant in them and i just dont like them, iv heard nothing but good things from hertz speakers and i came across a pair that was right in my price range Amazon.com: HERTZ DCX 690 6" x 9" 3-Way Coaxial Speakers with Grilles DCX690: Electronics theres the link anyone heard these before?? would i have to use an amp to power them? iv got a kicker dx 250.1 lyin around i was thinking of using to power them if it would make a significant difference, opinions?