08 Altima rear speakers - sounding horrible

[gdes71]

i recently bought a used 08 altima. the rear speakers sounded absolutely horrendous. i replaced the speakers thinking they were blown but they still sound crappy (the speakers i bought aren't top of the line but they sounded decent in the store). compared to the front stock speakers, the rear have low volume, even when i have the volume on max. the wires are not crossed. i'm wondering if it's just the quality of the stock head unit or something else but like i said the front speakers sound pretty good.

[DJ_B_Easy]

Are you sure the fade isnt set all the way to front?

[Stealthcoupe]

My rear speakers do the same exact thing. I set the fader all the way to the rear just to try them out and they are absolutely horrible. I think an upgraded headunit should help and in combination with some good upgraded speakers it should solve the problem.