Originally Posted by BillsonChang007
I am actually hoping AKG K812 Pro will fix the upper mids of HD800! Can't remember why but I really do not appreciate HD800's upper mids....
What's wrong with them? They are as uncolored as it can get nearly, check graphs... There is absolutely nothing wrong with vocals unless the recording itself is prone to sibilance (even using a neutral amplifier). But the majority of people prefer lush "LCD-2" like vocals so yeah, these are not going to be happy with HD800 which are much more realistic here :-)
I would suspect there is some "mismatch" in your audio chain:
1) Transport quality
2) Bright-sounding RCA cable
3) Wrong tubes used or an SS amp with emphasis on 1 - 2 khz area?
4) You mistake upper mids with treble... It wouldnt be as surprising as it is not easy to spot where exactly the problem lies - it could very well be that you find several treble regions offensive, not just one. Even subjectively not enough bass could lead to "flawed" upper mids/treble opinion.
I would say that HD800 are very responding to any change in your audio chain... Even changing DAC filter can make a real difference, especially in treble.
EDIT: You should maybe try the Anax mod as well... It could help you.
Edited by emertxe - 10/10/13 at 2:59am