Haven't heard the FI-BA-SB, I just have a hunch it's what you're after, this review is from shigzeo:
"FAD nailed these earphones. If you like bass, dynamics, and clear, uppity treble, you’ll love both earphones. Both earphones are voiced by space, pace, and beautiful echos. In typical FAD fashion, however, certain acoustics can be caustic, if atmospherically sophisticated. Consider it Final Audio’s marque. Their 1601 series earphones are HEAVILY accented toward the midrange with both bass and treble falling off in rapid succession.
The SB and A1 models have powerful and extended baselines that are matched by equally long-limbed high frequencies. The upper midrange and lower treble are accented. For most music, these accents are like day-old curry and simply tastier than they were the day before. Where they can be caustic is in chaotic alternative and fast, but lost psychedelic. Cymbals bleed in the upper ranges in ringing bursts. Fan of Broken Social Scene? Get used to a healthy dose of treble fatigue.
Strangely, no matter how expressive the high end, mathematical genres such as trance, electronic, and even hot, treble-happy 1980′s heavy metal, are perfectly fine.
The FI-BA-SB and A1 earphones follow in the footsteps of the 1601, if at a respectful distance. Their echos are clean, open, pleasing, and sharp. They neither claustrophobic or dark and thankfully, the rubber tips exert much less influence on the sound. This clear echo is ahead of peers like the Earsonics SM3 and way ahead of Sennheiser’s IE8.
The FI-BA-SB and A1 earphones impress themselves as heady mixes of two of my favourites: ortofon’s excellent eQ7, and Audio Technica’s CK100. Final Audio’s newest earphones best the eQ7 in treble presentation. They are less grainy and echo more sweetly. Genres that rely on space rather than just speed, jump out more, but retain overall sweetness. The FAD earphones are better tuned to jazz and vocal. In the low end, the Final Audio earphones exert more slam than the ortofon – dynamic earphone fans, pay attention! There is enough air movement to get your feet tapping, and just that extra bit of curry in the high end to satisfy those who get hot for the exotic.
Overall, the SB model offers a slightly spicier listening experience than the A1, though both the SB and A1 sound very similarly. Neutral freaks may prefer the A1 while atmosphere freaks who’ve kept their supply of chaotic alternative depressively low, may prefer the SB. Both offer good sense or space"