MMI Subwoofer control question
 

Hello all, just got my first Audi a few months ago. 2016 A6 2.0.

Before my car arrived I was in an A3 loaner with the B&O sound package and on the MMI sound controls there was a control for the sub woofer level.

My A6 has the bose stereo and there is no sub woofer control in the MMI. What i'm wondering is if I get a sub and amp installed (a system I already own), is there a way to hook it up so that the sub can be controlled from within the MMI or do I have to get a bass knob installed?

Any input would be greatly appreciated.

Thanks