Please help. 2000 P38 4.0SE :Harmon Kardon system. I have looked all over for the DSP amp. It is not behind the sub woofer.It is not in the sub woofer. I do have amp in each door and on the outside of the sub woofer. No DSP amp. I did find a blue box AMR6288 AM/FM/DIV-amplifier on the side with the sub. I found a Blue box AMR6289 FM Amplifier and a black box PA 6 gf 30. Did these replace the DSP amp? The radio works in another 2000 p38. The lights come on in mine but no sound.