Quiet Aux port???

[M1Combat]

I've noticed that my volume goes quite a ways higher when listening to a CD or radio than when I'm using my AUX port... I plug in my wife's Note9 and it seems better... but not as loud as the other inputs.

Any ideas? Is it really just the phone?

I have the aux port setup in the center console that does NOT have the USB... How do I go about getting the USB setup that goes in either the console or the glove compartment?


Thanks in advance