I would never purport to be an expert at anything.I know a lot about spinorama measurements and its correlation to preference. Firstly almost no one can interpret the graphs correctly. No offense but, I guess you are also not very good at it. Secondly even the not so bad calculation of the predicted preferences score has major flaws, especially if you compare multiple different good speaker designs. In the past the score was much more meaningful since the average speaker design was not that good.
Have you ever back tested your discarding practice with a speaker which is highly regarded by listeners despite the not usual measurements? I guess you have not?
So would you put the neumann speaker in the category of inoffensive and enjoyable for casual TV usage? As I mentioned even with eq the KH 120 is not that speaker and I guess the KH 150 is neither.
Yes you can equalize some speakers to some extent but without major knowledge you won't get that far. The task to transform a rather offensive monitor into an relaxed sounding speaker is challenging and to my experience impossible with some specific DIs.
On top of that I would not recommend anyone to do that without this major warning. Since you need knowledge, time and there is a higher chance to fail with your attempt. The logical way is to start with a more fitting speaker.
Even though I am ‘not very good’ at interpreting graphs I use them primarily to weed out poorly measuring designs, which saves a lot of time and expense.
My experience has been the better the measurements the more transparent the sound.
I would go as far to say that today I would not even consider a loudspeaker design unless it has been properly measured cea-2034/klippel.
Neumann is one of the few brands I do not have direct experience of but Amir’s measurements of their 420 appear to me to be excellent and they would definitely go on my ‘possibles’ list.
Sadly as a retailer I actually have to purchase stock before I listen to them, as a ‘punter’ I would always recommend insisting on a home evaluation.
I often hear poorly measuring loudspeakers nothing I have heard as led me to re-assess my opinion.
Keith