When you go further down on the same page and touch on the “Details” section of the item it says that the 2.5mm gold cable is balanced. Also TRS and TRRS are the difference between a single ring post plug and a double ring post plug on your headphone cord (see attached photos). It stands for TIP-RING-RING- SLEEVE. The double ring post plug became popular in 2006 and is mainly used on stereo headphone cords that also have with a built in microphone. It allows you to hear things in stereo while also being able to communicate. The headphones you received with your smartphone is what’s considered to be a 3.5mm TRRS Cord. A 2.5mm TRRS is exactly the same except it has a thinner tip on the plug.
Hope this helps, happy listening.
Boomer 🐼 🎧
No, different kind of pins for IEMs (in-ear monitors) and the HD 600 – series plus the HD 58X Jubilee. The good news, however, is that any HD 650/600/660S/660S2 cable will also be compatible with the HD 58X Jubilee; I like to use the Jubilee’s short cable with my HD 660S so I don’t get cables tangled at my computer!