I was wondering if any stock Toyota amplifier could be added to the 1999 Rav4 to upgrade the stereo. I don't want to change the head unit as I live in the Bronx, NYC, but I do want to use better speakers and get better sound. I have a pair of Boston Rally 6.5" I would like to install in the front doors, but they are rated at 40W RMS and I doubt the head unit could power them. I have the stock tape HU with CD controls and the single disc CD player. I've alread spent way too much time and money fixing/modding this and my other car and would really like a factory plug and play solution. I would appreciate any suggestions. I really don't want to use a line/level convertor and add an aftermarket amp as this would be conducive to me start adding subwoofers and more stuff to the car... which I really shouldn't do.