Gold Plated Version: Solderless plug compatible with both L/S. Compatible with cables with 0.2 inch (4 mm) diameter. (Confirmed wire: Canare GS4, FreeTheTone CU-416) Gold-plated only for the conductive parts to maximize the acoustic characteristics. In addition, the cover part is the same color as the normal one, so it does not affect the appearance of the product when mixed with the regular version. While maintaining sound quality and quality, the logo and other items are eliminated to reduce cost. For the straight type construction, please assemble the cable first through the hole as shown in the picture.