I don't speak a word of Japanese. But i appreciate you giving the only comprehensive review on KZbin. Strangely enough, I understood a lot more than I thought I would.
English comment here! I wish I can understand completely what you are saying but watching you showing the product is amazing already as I can imagine what I can use for it. I am lost during your TX1/TX2 explanation with -6db. Hope there will be an english subtitle for me to understand. Subarashii content! -from Singapore