I was going to Akihabara but I found it was raining when I opened the window. So, I decided spend all day to adjust Coral speaker to improve the sound condition which I bought last time instead of going to Akihabara First, I exchanged a capacitor for Wiemer's red capacitor (1.0micro). The sound was getting better but it sounded slightly vivid. I wanted to make it mellow sound, so I replaced it with minor oil capacitor (1.0micro) that I bought at Akihabara
Gradually the sound is getting close to my ideal one, but it can not give me a feeling of satisfaction. I attached 1micro of BITA Q that I bought before. I felt the sound did not satisfy me. I added 0.5micro and it got 1.5micro in total. I listened to Jazz music by Oscar Peterson for one hour but I was not satisfied with it perfectly. Then, I tried to listen to female vocal and I thought that high range might be too strong. So, I readjusted it 1 micro and listened to CD of Diana Clark . I think the sound might be better with 1 micro in general. I went to sleep over while hearing the best album of Saburou Kitajima of Japanese enka
Answer : 1.0 micro of BITA Q is most suitable for the best sound.