Piece of advice... Try to listen to your system at that exact volume while the car is stopped, the engine and the climate fan are off. Youl will find, possibly that it's totaly EARSPLITTING.
YOu have distortion at like 1000 or above hz, it fuks with your ears badly and will give you hearing loss VERY quicly. YOur ears simply are trying to shut off because the freqs are damaging and will cause pain.
I suggest getting some sound deadening an playing with any eq settings you have to try to find a eq curve wich is not damaging to your ears.