I'm having a problem with my rear speakers in my 98 GT. I changed the 6x9's out and not the other little ones in the back there. I also changed out the factory stereo out to a after market one. The problem I thought was with the factory speakers they were crackling and what not so I put some kicker 6x9's in. Then they were fine for a while but they just started to crackling the other day after having them in for about a month. I have the base down and the settings on the radio down so that shouldn't be the problem. So I would like to know if any one had this same problem before or knows what this is? And does the 98 Gt's have a factory AMP? I would like to get this fixed so I can listen to the radio with out messing out my speakers.