hello and thanks in advance for your support. I have one c200 kompressor with audio 20 standard head unit. I've install successfully the aux input cable. everything goes fine, but the volume of aux input is lower than the radio or cd volume. does any radio settings to adjust to balance the input gain between sources? I mean any secret menu or engineering mode for the audio 20 to adjust the differents gaint between sources? thanks in advance,

 

I also added the aux jack and had low volume and researching found you need to add an amp inline with whatever you are plugging into it