Car speaker?? what is the best!!?

"The sensitivity rating has no relation to sound quality, as some of the very best speakers have low ratings. Sensitivity ratings simply tell you how much sound a speaker will produce for a given power input." http://www.jsdsound.com/sensitivity.htm In reality you just need to go into an audio store and listen to find the ones you like the most. All most every company makes 4ohm speakers for cars. Infinity Kappas however run at 2 ohms and will generally be louder than others on the same equipment.

Sensitivity is its response to a given imput. So a more sensitive speaker will produce more sound with a lower amount of watts. If you don't have a seperate amp you will want to look for speakers with higher sensitivity.

if you have too much bass then you would want to get highs so you can actually hear the words but if you have lows it makes no difference to sound just get a set of highs and add subs for your bass!