Hi I'm new to this site and have a 98 GTP

When I bought the car the stereo in it was an aftermarket jensen tape player and it had crackling in all of the speakers.

I had best buy install a new radio with touch screen, my amp and subs, and some new 6x9 speakers. There is no crackling coming from my subs, but in the new 6x9 speakers they have the same crackling.

They recommended that I either get new front speakers as well or may have to remove a factory amp.

I guess my question is.. Can a factory amp cause this issue?? Its a very horrific sound if I turn my volume up to 20. I have tried using the fade to rear option and the noise is there even in the new pioneer speakers.