08 GT, Shaker 500

I have a MTX 152, 2 x 75 and a Qlogic with a 10 inch sub, and a Blaupunkt MP680us 4 x 50. I am trying to see what I can do to upgrade the stock stereo with what I have. Is there any way I can add the MTX and sub and add the Blaupunkt for the satellites? I have been considering the MTX thunderform with amp, and use the MTX 152 for the rear speakers and the Blaupunkt for the remaining speakers. Would this work with the shaker 500, sound any better? Would I have to replace the factory speakers? I read somewhere that the factory HU sounds like crap with aftermarket speakers because of the preset EQ curve to match the factory speakers. True? Any advice?

 

use the mtx152 with the sub u have, use ur 4 channel to power the door speakers and rear deck speakers, i recommend some cheap coaxials vs trying to use stock speakers which you could. the sound should be tons better even off stock headunit

i would either leave or disconnect door subs, i dumped mine and love it