Hi! I have to replace my rear speakers because one is def.. The original ones had 10 ohms but only 4 ohms. Sounds rather bad, very unclean. I don’t want a boom boom, just clean sound. How can I change that? But I really want to hold onto my original radio, because nothing new fits and doesn’t look like it. A “leading electronics store” recommended with 6 ohms of resistance parallel, but I haven’t tried anything. ngen with?