TBH that's my own choice now, I use and love my 4313Bs (4313Ti...) for they are no 4311s which were not bad but not what I want. Tight and light-speed bass impact, no boomy, clear, neutral, dynamic. I want the same but faster and clearer. And that way leads me to ATC's SCM50... crazy prices even used. I guess I will enjoy my 4313B for years