Horaiko uses very easy to drive 32 ohm drivers and is what I consider a neutral pair of earbuds.
It aims to deliver high quality audio at an affordable price and spread the word of flathead earbuds.
The use of acoustic filters on the back of its shell help create an open sound signature, with its stage being one of its strongest traits.
It's the all-rounder entry and an easy bud to recommend to most people!
Price: 35USD
Hanabi uses 64 ohm drivers and has a more intimate, detailed sound.
It's a step up from Horaiko in terms of technicalities, but it also appeals to different tastes.
The bass is quicker and has good impact, but it doesn't linger around, helping details shine through it.
It's a mostly bright and punchy set and recommended for people looking for a detailed pair of earbuds.
Price: 55USD
Umi uses 300 ohm drivers and offers a big, spatial sound.
It is a big step up from the first two offerings and is a very technical pair of earbuds.
Its strongest trait, though, is the atmospheric presentation of music. It does not aim to be "correct" or neutral, but to be unique and offer a big sound in a small package.
The high-impedance drivers, though very sensitive at 118dB/mW, do benefit heavily from good amplification due to its impedance curve.
Price: 155USD