LoL - video that gif was taken off is as classic as the model F-990's - not bad going for a pair of 1970 something cans, who'd have thought it?
These came to me from the States and the carriage cost more than the cans - think cans alone were only $22 USD!
I find these cans intriguing, as though they are in some way a portal back to there era and a taste of how some experienced headphones at that time, which I guess is what they are.
They are on the heavy side, but quite comfortable, sound is veiled and the bass when EQ'd is mighty meaty but very muddy and bloated, but that just adds to their charm, the SQ feels and sounds right for what they are if that makes sense? But these cans were made to last for sure and push bass air no problem.
Serious bit of vintage kit
That guy in the gif should have been wearing a pair of these before he lit his home made explosives and he might have only taken half the blast force to his face - lol
Seems to be a running theme here, even with these vintage classics - MADE IN JAPAN