Swap out the tweeter's electrolytic caps for $5 poly film and foil caps you will be amazed. You will need a decent 25-30 watt pencil type iron, some speaker wire as the caps will need to mounted inside the door panel or A pillar. 4.7uf is the size. Parts express, Madisound, sell these Solen are popular, I find the blue Jantzen StandardZ caps sound much smoother. Avoid the PE house brand, they are terrible, almost as bad as what you are pulling out. Desolder the leads for the stock caps and pull it out. Hook up the leads from the pigtail to the tweeter posts. Here is why I say a decent iron, because you need to get this soldered quickly so as not to melt the plastic. There is no polarity here, but a rule of thumb is to do the same thing left and right for the best stereo image.