I have a 1999 LX 35th Anniversary with the Mach 460 sound system. The previous owner had a system in the car before he sold it. The stock stereo is in the car now. Now, my father has a 1999 SVT Cobra with the 460 in it. I did a comparison side by side, had the setting the same with the same song playing in both. What is wrong with my stereo that it doesn't have as much bass as his?