the white line version of ATH-FC5, which is quite similar to the iron triangle, is very imaginative from the overall shape, beam shape, cable position and the plexiglass on the ear drum. The only difference is that the plexiglass of FC5 has the trademark of the iron triangle, but it is not in the picture you gave. However, the absence of the trademark in the MV may also be a deliberate and artificial result. Now the licensed market price of ATH-FC5 is about 275 yuan.

user evaluation:

/pro/53576/news3683 _ 15839.html

Chinese introduction of ath-fc5 (the headphone cable is black):

.hk/sim/model.php? s_id=1& m_id=33& Pa = 1

Japanese introduction of ath-fc5 (the earphone cable in the picture is white, according to the actual sales information, there are indeed two versions of fc5):

http://www.audio-technica.co.jp/products/HP/ath-fc5.html.