FM works fine and i get music from all speakers, that is correct.
With CD playing i get music from right side speakers, that is correct too.
The speakers are factory, at least the rear's i know for a fact are. They are marked Nokia on them. The speakers in the door's and kick panel's i assume are factory.
The model # is cda-7894.
And lastly, there is no cd changer in the trunk or anywhere in the car.