Sorry to be a pest but I have one more stereo question for the experts. I have a 2008 Ram with the Infinity system with 7 speakers, single disk cd player with the amplifier behind the glove box. Does anyone know the impedence of the current stock speakers(2 ohms? 4ohms? 8 ohms?) and has anyone replaced the speakers with aftermarket units? If so, how did the stock infinity system sound with better speakers and what did you use? My understanding of the system is that the 3 dash speakers are highs only, the front doors are woofers or lows only and the rear doors are a combination of midrange and highs but this information may be incorrect. Any and all responses are appreciated! Thanks!