I believe Joker reviewed these.
I also had these, and compared them with my UE700 and CK10. All three are dual-BAs. And I've auditioned the ER4 as well. All I can say for the PS200 is, I had no love for this...mediocrity made by the kbats. In general the sound sig is more similar to UE700 than to CK10, but is more laid-back than both, a very relaxing dual-BA (though the highs still have more weight than the lows). All I've described below is some comparison against my other IEMs. For example, I left out treble extension and soundstage because they were similar to CK10 and UE700 that I felt no need to elaborate on:
Very balanced and neutral sound. Where the CK10 has a huge mid-treble bump, the PS200 only has a hint of one, thus, in direct A-B comparison against the CK10, the PS200 feels darker. (not saying it's a dark IEM).
Bass is slightly more quantity, but not as fast or hard-hitting as CK10. Typical BA bass with the amount slightly boosted, but nowhere as well textured and real as a good dynamic.
Mid is where it should be. Not too recessed (or rather, pushed out of the spotlight by overwhelming bass and highs) like TF10, and not too focused on like SE530. It feels smoother on the PS200 and more enjoyable than CK10 because as said before the PS200 doesn't have that huge mid-treble bump, thus the whole freq response is more smoothly presented.
In the end, I did not keep these for the following reasons: 1. size being too huge (directly impacts comfort and...brownie points). 2. lack of individuality (because I already have UE700 and CK10). 3. weird nozzle size. (only came with silicon tips, and I reckon only Shure tips would fit on these).
Verdict: for $145 these are pretty good, but other dual-BAs can also be found at or below this price range (B2, UE700, etc), but the PS200 would be an upgrade from your MC5.
