inputs.text: impressive - replaced 6x8 speakers f150 transformed systehem stock systehem single cd amfm head unit sirius radio four 6x8 speakers also ipod linein connection top dash sirius radio free six months receiver made work stock head unit not simple plugin replacehement front end hope new speakers would provide improvehement lackluster performance stock speakers replaced front speakers first faded front rear compare stock speakers boston acoustic sl80 speakers far musical accurate hear qualities individual instruments voices highs sweet bass amazing small driver could easily live systehem long truck sure sl80 speakers strongest link chain replacing weakest link could benefit upgrading rest systehem stock cdradios better quality used upgrade would probably mean replacing everything else order add subwoofer compatibility head unit comes hope could utilize sirius antenna integrated roof keep linein connection dash ipod