The only current earphone review more encyclopedic than Brooko's review of the FLC8S is Just your random audio blog's review of Ocharaku's Akazakura Plus. It's harder to follow, and nowhere near as well shot, but it goes into terrible detail about the technology powering one of today's uniquest earphones from one of today's uniquest manufacturers.

And so, it's this "variations in technical ability" that I'll focus on more in this review rather than its sonic signature. It is noted that the Akazakura, and most likely its sibling, the Sakura, deviate from the typical signature quite greatly, defining them as a new generation of Flat4, something I honestly feel is a brilliant step in the right direction.

Source: The Red Cherry Blossom - Ocharaku

Relevant links:

ohm image: A wide angle on Ocharaku's Sakura Plus
ohm image: A date with Ocharaku's Sakura Plus & Akazakura Plus
ohm image: ohmage to the Ocharaku Flat4-KURO
Headfonia: Review: Ocharaku Flat4-Sakura Plus – Atmospheric
Headfonia: Ocharaku Flat-4 KAEDE Type II - Tremendous Wood
Headfonia: Ocharaku Donguri Review
TouchMyApps: Ocharaku Flat4-KAEDE earphone