I think your misinterpreting what I'm saying or I'm not getting it across correctly.
Every exhaust I have heard and read reviews on has a 2k rpm boom. It was there with the standard exhaust and so with the MPE. Iirc bmw engineered it in?! Yes there is a slight drone. When I say slight. I mean the smallest little murmur in the back ground. Music is on no louder than when I had the MPE and my voice hasn't had to raise at all too speak to my passenger. I've been a passenger in a e92 with the eisenmann race and that droned alot worse.