well heres the deal .....i have a friend i work w/ that has an 84 mercedes 190 E and she is wanting to replace the rear speakers but they are only 4" factory....what kind of speakers do you recomend...she'd like to try to get some kind of bump out of them...but i think its going to be a little difficult...im going to recomend getting a small sub or somthing for that little bit of extra....also she is going to be powering this w/ an aftermarket h/u....i'm looking for one for her right now....what kind of recomendations would u guys give me on that as well.....i'm thinking pioneer but thats just cause i have never had any problems w/ my pioneer ....any input would be appreciated....thanks