Intro: Since the Xenon 6 and Neon 4 share the same DNA, I've decided to write a combined review for these iems with a brief comparison between the two. The Xenon is the flagship and the Neon is the baby in the Frontier Series line-up. Rather than regurgitate the product info for the new Frontier Series from Fir Audio, I’ll provide the following links containing all this good information: https://www.firaudio.com/store/xenon-6 https://www.firaudio.com/store/neon-4 The Fir Frontier Series iems can be purchase from MusicTeck here...

Intro: Rather than regurgitate the driver technology and description here, I’ll provide the following link containing all this good info: https://www.uniquemelody.org/products/um-mext I’ve been wanting to try a Unique Melody Iem with bone conduction drivers and almost purchased a Mest MKII, but decided to take a chance and pre-order a MEXT from MusicTeck instead. Check here for US stock: https://shop.musicteck.com/collections/um-unique-melody/products/um-universal-mext?variant=39664533078078 Specs & Packaging Contents: Build, Ergonomics...