relationship between Master Volume & media bay?

I don’t understand the relationship between the master fader and media bay. When I select a loop in media bay it is at max volume and the only way I can adjust the volume is with the slider in media bay. Problem is that is has to be set to about 1 or 2 in level and that is still loud??? If I open a loop and forget to set the media bay volume at that level it’s so loud that it could ruin my speakers.

Why is this. Is there no way to specify a relationship between the master fader in the song you have loaded and media bay??