Ok so i've been using my DT990 Pros for a couple years now and yes they are great on mids and highs but bass kind of invisible so i rely on guess work really. My HS5 arent great in the lower ends either so my bass always ends up really hit and miss. Im trying this reference 4 software to see if it makes any difference. I dont know that it will really but even if its just eqing my main out to get a flatter response doesnt hurt to try the demo i suppose. I will suck it and see.