Yamamura lived 6 months in my home,i was not married and worked under one tree of my garden and my father everyday brought coffe to him
He worked 14 hours every day and never finished some because every day had different ideas
He always told me there is no one good dac because all chips are terrible.
He did an amp of 220 kg mono with external power supply to me,in 1990,was really incredible for that time,Audio Note and Audio Tekne was unknown in Italy,push pull of 845 and superpermalloy trans and told me the only thing to do better is to do power supply with battery,but no battery good on the market.
He tried to get from NATO,he had a friend there,battery used in Scotland on nuclear submarine but at the end cannot take.
He asked his partner,company was A.R.T.in Italy, to produce and buy 6 power transformer with very special construction and expensive.
When trans were ready he told to his partner has another idea and has to do one modified to trans and build from beginning
At the end they did one speaker to me with mid lowter PM 2A ,my amp,2 preamp and 4 turntable and then company broken and he went to England to do an other company with mr. Churchill.
This is Yamamura
When i knew he told me cd has no good image because the board of cd is lucid and the laser light cannot stop,so kept the sand paper 00 and pass on the board of cd to become opaque and the light stop there.
After 10 years others did the green pen for the board of cd and brought to me some footer of graphite high density to put under speaker
