My thoughts on: InEar PP8
The PP8 is often hailed as THE flat monitor within my local audiophile group. Neutral is subjective but the PP8 does carry a clean, perhaps too sterile sound that some would dislike. I would not venture as far as to say its clinical or analytical, because these words mean nothing to me and are also subjective. Mixing is often done with actual studio monitors (with subs) and perhaps certain groups of people use the PP8 to monitor for convenience.
The PP8 sounds more like a tool than something for enjoyment, somewhat like the MG5HX. The lack of emotions seem to be a problem for some of my friends. That isn't to say it's very specialized however - the versatility plays well for most of my music. The bass and treble switches are well implemented and my preference is to turn both on. To my ears, it still does have slightly too much 1-2kHz leading to slight honkiness but I think most people wont hear this problem (just how I hear it, it seems). Due to the way the mids are tuned, the PP8's midrange can sound a bit dry. Perhaps this dryness is due to a lack of treble extension, I don't exactly know.
With the bass switch on, I still find that I would like more subbass extension for a "flat presentation" but there is sufficient midbass punch. Punch is quick and tight. Treble on the other hand, has sufficient quantity on the lower treble to be present but not fatiguing. However, the extension can be improved. Cymbals are a bit hazy and lack definition. They could use more shine and shimmer. Imaging/attack is good overall but nothing special. Perhaps more extension on the highs is needed for a sharper and more defined attack. The PP8 has quite a noticeable "BA timbre" quality for me as well and is a bit grainy.