Thanks everyone for leaving comments on my original post. After living with surreal sound for over a month, I was able to optimize the sound of the base (not pro) system as follows:
Equalizer settings: base +5, midrange 0 and treble -2.
Balance: in center but placed posteriorly into the first quarter to 1/3 of rear seats.
These settings, although not for everyone , improved the sound significantly to point it was comfortable and more enjoyable to listen to. Placing the balance toward the rear was a game changer. I also noticed that the volume has to be turned up to better appreciate the sound, although not a fan of listening to loud music as I wish to preserve my hearing.
Equalizer settings: base +5, midrange 0 and treble -2.
Balance: in center but placed posteriorly into the first quarter to 1/3 of rear seats.
These settings, although not for everyone , improved the sound significantly to point it was comfortable and more enjoyable to listen to. Placing the balance toward the rear was a game changer. I also noticed that the volume has to be turned up to better appreciate the sound, although not a fan of listening to loud music as I wish to preserve my hearing.