2007 tahoe problem

[phiboyy13]

just wondering if any one on here knows about audio of carss.. well my dad owns a 2007 tahoe and the radio would play but has no bass. We changed the radio but still has the problem. were wondering if this could be the amplifier or not but we cant the location of the amplifier. and also can it be the speakers in the carrr? also did any of yall has had this problem before and what did yall doo.