I "think" the originals pre 1974 factory single speakers where 4 ohms, maybe 8 ohms. confused
As far as ohm rating the smaller, lower, the numbers the less resistance. I'm not sure about how that affects the wattage needed to drive them confused shruggy
I'm wondering if the stock AM and AM/FM/ and AM/FM tape player radios had different wattage output for multiple stock speakers work confused

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)