just these speakers added as rear speakers in my cruiser adds all the punch i could expect from attachment to just the head unit with no power amp or subs. I am not looking for the rattle the neighbors and damage your hearing volume, but as a musician, a bassist to be exact; I am looking for powerful bass response and clear clean highs. these speakers added to my JVC head unit provides all that I want. I will not be looking for further upgrades. I cant comment on durability therefore neutral rating on that level.