Brands of the headphone

˙Germany
Sennheiser                      
http://www.sennheiser.com/sennheiser/home_en.nsf
Taiwan commercial agent's website
http://www.uni-announce.com.tw/news.html

Beyerdynamic                 
http://north-america.beyerdynamic.com/

Chinese official website

http://www.beyerdynamic.hk/index.html


˙Japan
Audio Technica(ATH) 
Chinese official website
http://www.audio-technica.com.tw/

Sony                 

Chinese official website

http://www.sonystyle.com.tw/is-bin/INTERSHOP.enfinity/WFS/Sony-SonyStyle-Site/zh_TW/-/TWD/ViewApplication-DisplayWelcomePage
                        
DENON            

Chinese official website

http://www.denon.com.tw/tw/pages/home.aspx

  
˙America
KOSS                           
http://www.koss.com/

Westone                                   
http://www.westone.com/

Shure                

Chinese official website(Chinese Simplify)

http://www.shure.com.cn/

Ultimate Ears                 
http://ultimateears.com/en-us

Grado                                      
http://www.gradolabs.com/

Monster                        
http://www.beatsbydre.com/Default.aspx


˙Austria
AKG                                       
http://www.akg.com/


另外這個是台灣的耳機論壇
And there is a Taiwan headphone's forum.
裡面有很多資訊 或是有問題裡面搜搜幾乎都可以找到答案
There are many informatoins and you can find an answer when you have questions about headphones.
AndAudio
http://www.andaudio.com/