I have the KS H-03. They are not very good and I use them infrequently, but I can say a couple of positive things about them:
- They are very light and comfortable.
- When driven by my BHSE, the midrange has a very enjoyable quality that reminds me of some speakers driven by SET amps. Too bad the highs and bass are not improved.
- The pads are too shallow. My pads split open (while the headphone was sitting on a shelf). I replaced them with "Dekoni Audio Fostex TH900 Elite Hybrid Replacement Memory Foam Ear Pad Set" from Amazon. The Dekoni pads made a really significant difference. Much better balanced frequency response. Actually, pretty descent headphones with these pads.