thank you very much for sharing the info and comments. I currently have a kh750 pair with kh80. when i play loud, occationally the 750 could be in red (overrunning). so im considering to add a 750, then 120ii or 150. thanks again. it's helpful.Here was a comparison (just before the thread got polluted with endless pages of useless bullshit discussions):
Neumann KH120 II
Genelec should wake up and and update their 8000 series (which is16 years old now)Becaue Neumann is is starting to bypass them I guess a separate thread would be fine to discuss the future of Genelec product portfolio or whishes to Genelec (e.g. make it sense to let the 8000 and G series live...www.audiosciencereview.com
You can see that the 150 can play about 5 db louder in the upper bass area (above the sub crossover frequency) than the 120II. Also i think it has a bit narrower directivity which probably makes it better for bigger distances than the 120II.
Personally the difference between 100 and 105 db would be of no relevance for me, because i almost never listen to more than around 80db, but you have have to decide for yourself if you want some more headroom there or not. If the other small differences sound different depends on your room and is hard to predict, i think. I don't know, but i would expect them to be subtle.
I think both can work, maybe even just the same in most situations, but if i were you i'd probably prefer the 150, just for the peace of mind - more for psychological reasons.
I don't think you can do much wrong with either choice. I think i would start with only one or even without a sub, though, and see if you really need (two of) them.