看http://www.hifi168.com/bbs/article.asp?titleid=29474&ntypeid=10
http://www.hifi168.com/bbs/article.asp?titleid=30204&ntypeid=10
http://www.hifi168.com/bbs/article.asp?titleid=30068&ntypeid=10
http://www.hifi168.com/bbs/article.asp?titleid=32693&ntypeid=10