Photographed: The Blon BL-03
The $40 Blon BL-03 is a single dynamic-driver earphone made of zamak (a Zn-Al-Mg-Cu alloy) that was provided by Easy Earphones Store for my critical analysis and upcoming review. The BL-03 and $270 Tanchjim Oxygen were tuned by the same guy and sport the identical DLC dynamic driver. Out of the box, these sound mediocre but with the right tips they are stellar with an unbeatable tonal balance.
My review of the Blon BL-03 is here: https://www.audioreviews.org/blon-bl-03-review/
The BL-03 was tuned by the same guy who also tuned Tanchjim Oxygen. The DLC dynamic driver inside is the same as the one in Oxygen. I have the BL-03. Love them!