Thanks to our trio, I received my HD669.
Well, I'm very happy to get this kind of headphone with such as reasonable price.
After <40 hours of burn-in, I tried to listen "Tiesto Club Life - Volume One Las Vegas",(Overall bit rate: 1 022 Kbps,Format/Info: Free Lossless Audio Codec).
*To clarify, I'm not an audiofreak, so I know nothing much about music and audio.
The Design1.) Luxury look, my friend can't even believe I brought it just RM1XX, they though it costs around RM500.
2.) Weight and size, this headphone is not made for portable, it's big size, you don't want wearing it walking around the public.

3.) Confort, I do not know why Superlux design in this way, the clamp was strong and tight, like 2 pieces of pillow pushing your head, is not very comfortable to wear it for hours. My girlfriend with has a small head complain just after wearing it few minutes. The earpads is soft but it create sweat instantly.
SoundFirst thing I do is to hear the bass, maybe my expectation is high, I'm very disappointed with the quality and the quantity of the bass. By default setting of my PC and Galaxy S2, the bass and kicks is weak, I need to do some equalizer changing to increase the bass. After tried with Poweramp(Android apps), the bass kindly improve, it's acceptable but it's still incomparable to beats headphone.
The best part, mid and high, do not know how to describe, the sound is so clear and natural, you can hear every single detail of the music.
The sound is very 3D-like, well balance for movies.
*I use beats Solo HD as comparison.
Rating:
High - 9/10
Mid - 9/10
Bass - 2/10
Design - 8/10
Comfort - 3/10


As I can conclude, It is a great headphone with such price. The clamp should be looses after long hours of wearing. Basshead like me should stay away with this model, people who like mid and high, no doubt this is the right headphone for you.