ok first, in my car it has a jbl audio, and it has good low and high tones in the right side speakers front and back. when i turn the knob to the left, it goes to all high tones. is this normal? also, i have a 94 mustang with premium sound from the factory and it will out bass my jbl audio all day long. it doesnt even have a sub-woofer. is this normal too?