Only SAWAFUJI SF-17 puts out an natural top high tone in old headphones, and the resolution is very high.However, the volume hardly goes out even if SF-17 ties to which headphone amplifier (I'm using LUXMAN P-1).
YAMAHA HP-1('s sound) is looks like a modern headphone, and the sound is almighty.
VICTOR HP-D50 and KAWAI SH-5(ATH-2) are like to HP-1 and its sound is also almighty, but their sound are more soberer.
T50 have also high resolution and the sound is more powerful.
KH-92 have the high resolution, and very very soft sound. The sound of KH-92 is like old fine LP sound. I love this
SE-500 is a more delicate sound. The maximum input might be low.
The rank falls into HP-50S and U70 a little in these headphones.
However, I noticed recently that these orthodynamic headphones cannot show the original performance if you don't hear them after sounding for about 10-20 minutes. Therefore, it's very difficult to rank these headphones.
I love the way you described each of those! Nice to see different words used, gives a fresh take from the usual audiophile speak that I use.
I'm not sure what you mean in the last paragraph though. Do you mean that the headphones need to warm up or something?