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I'm really enjoying almost everything on TH900 and vocal It's very clear and sound stage Is reasonable, Anyone has HD800 and TH900 to describe small comparsion between those two?
The TH900 and HD800 are very different headphones, in fact I consider them as antithesis of each other.
In terms of sheer technicalities, no dynamic headphone beats the HD800. It is the pinnacle of neutrality, clarity, imaging and soundstage, rivaled only by top-of-the-line electrostats such as SR-009. However, the HD800 can sound cold and analytic, and somewhat lifeless depending on what you listen to. It is by no means a fun-sounding headphone, and doesn't work well with fast-paced genres due to its relative lack of PRaT.
The TH900 has a rolled-off mid that gives it a V-shaped frequency curve, so it's not as neutral as HD800 and somewhat colored. It has a wide soundstage for a closed headphone, but nowhere as wide as that of the HD800. However, the TH900 is a fun-sounding headphone, in my opinion more euphonic and musical compared to the HD800. Unlike the HD800, you can enjoy virtually all genres with the TH900 to great satisfaction. The TH900 also boasts great bass quantity and quality, the best bass I've heard in a headphone next to the LCD-3.
If you listen primarily to classic, jazz, acoustics and vocals, I recommend the HD800. But if you listen to a broader range of genres, and especially rock or electronica, go for the TH900 and you can't go wrong. In fact, I think owning both headphones will complement each other's weaknesses.