Not sure I am 100% agreeance with that. Today's factory speakers can rate well. Many of the high end sound packages have name brand speakers. My old car had MB Quarts in the front and factory in the rear. I was powering them with a high end amp (Which I think is first importance when upgrading a stereo system, with speakers being last, unless absolutely necessary). The factory speakers held their weight against the MB Quarts without a problem.

Basically, unless you are planning to pump huge wattage through the main speakers, I would hook it up as is and see how it sounds. Then, decide whether the speakers should be replaced....

And the "pain" I was referring to was that of the ripping the car apart in the first place....

Just my thoughts on it based solely on personal experience.

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