Well, I wouldn't say that the sound doesn't appeal. Some folks are likely running devices with higher source impedances that that would certainly shape the PP8's response in a more positive way. Also, a lot of people still like the UERM sound. This is like an UERM with less veil and phat bass (a good thing). As far as FIBAE: LOL! It's nothing so special that it deserves an acronym; but I do think Custom Art should be appauded for considering this approach. They marketed it extremely poorly though by telling the consumer how it helps for a consistent sound that isn't affected by source impedance. It's tradeoffs. One school of thought is that adding more parts to the crossover results in less transparent sound. And then there are engineering decisions, like how flat do we want to make the impedance curve, very flat, or just reasonably "good enough" flat. These decisions could impact the drivers used, how they are wired up, how big the shells need to be, etc? Then there is the other side of the problem. Portable playback device and phone manufacturers aren't shooting for a standard of near zero ohm source impedance. Probably reasons behind this because a resistor after the outputs helps the devices survive the inevitable short circuits caused by consumers.