Hello gang I have a 2016 Ford F250 super duty XLT wanted a little bit louder of sound, so I replaced my OEM speakers with brand new Kenwood speakers all around no subwoofer or amplifier and I have a stock radio that has the Sirius XM satellite and the single CD player. The problem I’m having is that the front speakers sound great however, I can barely hear, the speakers in the back I know the wires are not crossed so I’m wondering is there a factory stock amplifier that is restricting it or am I just not aware of some thing that I missing and if anybody has suggestions of how I can upgrade my head unit, but still retain my satellite that would be grateful. Thank you all in advance.

 

Were all 4 speakers the same?

 

Along with hanky's question,, from the audio unit settings tab, select 'sound' you should then access bass/treble etc. and then the Balance/fade bar slider will open cabin speaker /seating position ranges.
Is it still set at the default setting?

 

If all (4? ) are not the same, what we call impedance matching gets into the picture.