Installed the capacitors in the doors of my Infinity sound system. I can now hear the rear speakers. I'm partially deaf & don't run the sound above 25. Not a big fan of Bass. This upgrade has made a difference in the way the system sounds. It was worth the effort. The Mrs told me to quite playing with my car & get some work done on the house. I'm retired, MOST of the time I do whatever I want. By Friday I should be able to do NOTHING.