El título no es que sea muy original pero creo que vale la pena opinar sobre esto
Parecen de Sony, comentarios hay en favor de ello
Genuine Sony MDR-EX300SL In-ear Earphones with 3.5mm Stereo 0.9M Cable (Black) $8.44
# Exquisite genuine Sony headset/headphone design draws much attention from buyers.
# Stylish, simple, fashional and portable design offers much convenience.
# With a balanced voice performance and stylish appearance, this earphone becomes a great choice of game players.
# Compatible with portable MP3/MP4, CD/DVD player.
# Type: closed, dynamic.
# Impedance: 16 ohms.
# Frequency response: 5 - 24,000Hz.
# Drive units: 13.5mm diameter (CCAW adopted).
# Cord approx : 0.90 m.
# plug : 3.5mm gold-plated L - shaped stereo mini plug.
http://www.focalprice.com/EP487B/Genuine_Sony_MDREX300SL_Inear_Earphones_with_35mm_Stereo_09M_Cable_Black.html
más falsos que un billete de 30€.