Hi, Goraman! I thanked you in the Welcome section for guiding me to these truly outstanding headphones.
I would like to add my five cents to the discussion.
If this is not the right place, I'm sorry, I'll move the post.
As for the presentation of the sound, they are unique headphones. No other headphones sound like that. The general characteristics of the sound remind me of the highly praised AKG K240 DF, used in recording studios and radio studios in Germany. But the AKG 240 DF does not have this very special spatiality of the sound and bass.
I came across Superex PRO-B headphones by browsing the old Lafayette catalog. My first thought was: "Nah, Koss Pro 4AAA did not sound so good, so it makes no sense to spend the money in vain again." But then I came across your post that was really interesting, i.e. that Superex PRO-B has a unique sound that even electrostatic headphones do not have. And I confirm this!
At home I have Lafayette F500 and Lafayette F990 headphones, another 2-way system of the era, made by Elega in Japan produced under the name Elega DR-119CH:
http://20cheaddatebase.web.fc2.com/elega/DR-119CH.html
https://www.head-fi.org/threads/lafa...ons-eq.756312/
and both Superex PRO-B and Lafayette F500 come to life only on the Realistic Sta-220 and Sansui 3000A amplifiers. These two receivers are among the best that have ever been produced. They are unique when it comes to extracting high-quality bass from the speakers.
Japanese engineers, i.e. those people who produced the best amplifiers of the era, i. e. Sansui 3000A, Sony STR-6060FW and Realistic Sta-220 (Hitachi SR-1100) knew what they were doing, because everything depends on the design.
In my opinion, the Superex Pro-B headphones have been specially made for jazz and classical music and hence their unique presentation. Rock music does not sound so good on them, at least not all songs, but all jazz music sounds highly outstanding with superb clarity, sweetness and unique tone.
As for the mods, one idea to get most from Superex PRO-B's extraordinary headphones is to use Sansui 3000A, Sony STR-6060FW or Realistic STA-220 with an adapter like HiFiMAN HE-Adapter to be able to connect the headphones straight to the loudspeaker inputs. I was using HiFiMAN HE-Adapter with AKG K240DF headphones after ordering the adapter from China.
But it is also possible to make such an adapter:
http://www.dms-audio.com/power-amp-heaadphone-adapter
or to buy a cheaper one from China:
https://hifi-exquis.com/headphone-ad...t-adapter.html
The most important thing to remember is that the sound will be the sound of the amplifier to which we connect the adapter and the Superex PRO-B headphones, and hardly anything can beat Sansui 3000A, Realistic Sta-220 or Sony STR-6060FW.
Best regards,
pmusiaowski