installed new pioneer head unit w/ alpine speakers... need help Options

[DIONYZUZ]

So I just installed the pioneer head unit that supports 50w per speaker and I got 4 alpine type r speakers that support a peak 600w per pair (1200w total) . And I hooked the unit up connected to the factory amp, which I'm thinking was not such a good idea. When I installed they two front speakers they sounded decent, but it seems like the rear speakers are barely letting sound out. At first I was thinking it was the speakers, but now I think the amp to the unit is distorting the signal for the speakers. Would it be better for me to replace the factory amp with a pioneer amp to get these alpines with better power and clarity or is the factory amp not a problem?

[99gt3sge]

So are you going to run new wires from amp to speakers ?

[DIONYZUZ]

So are you going to run new wires from amp to speakers ?

I wasnt planning on it, will it make a big difference?

if you are upgrading all the speakers but specifically the rear sounds lower, is because it actually needs to be amped by an aftermarket one, the stock amp is crap. if you go back to the stockspeakers, you'll notice it'll get louder thats 1 way to tell

Yup I can't wait till the amp comes in, because I could tell the stock amp can't supply enough power all around, I could hear the rear speakers going on and off, it's annoying.