Which amp do you recommend? I would like to best Dr.Xin's amp. In japanese review, Sound by SM3 is better than that by SM4. If so, I would like to look for SM3, and buy SM3. If you review SM3 and SM4, Please teach me the difference between SM3 and SM4. But, majar problem is various...

HD60GD9 is very good source in Japan. I would like know your opnion abou HD60GD9, and appreciate portable amp and IEM.

I have SR-71A. SR-71A is very good, but I am interesting in SR-71 (not A). So, please teach me your opinion that which amp better.

Which do you recommend custom IEM, UE 11, Weston ES3X, and others? Please teach me your recommendation.

Now, I will get custom IEM. Candidates are UE 11 pro or Westone ES3X. I know charecters of UE 11 pro and Weston ES3X. Please teach me your impression if you have.

Hello I would like to intoduce the FitEar 435 IEM. This IEM has 4way, 3units and 5reciver, and is made in Japanese company. This sound is very good in Treble and Midrange, but bass is slightly week. However, total sound is very clear, and can be used as monitor. FitEar is custum IEM...

Hello, I am looking forward to get the SuperMacro-4 with Hi-C mode. Spec OPA 627A x 2 BUR634 x 6 OPA 2134 Please teach me where will I get SuperMacro-4 with above spec. Regards

Hello, I am intereting in Dr.Xin's SuperMacro-3 and SuperMacro-4. Please teach me a difference in sound between SuperMacro-3 and SuperMacro-4. Regards