It was raining from last night. I decided to compose an Attenuator at home. I already bought parts.
It was pure sound of power amplifier. I had used a pre-amplifier of McIntoch and a CL35-2 of LUXMAN before but I could hear only sound from a pre-amplifier. And then I had used a ready-made amplifier because I liked rather sound from a power amplifier. I could hear sound from a power amplifier straightly.
What was my worry was if my own amplifier made good sound. I used single wiring, non-gold plating connector and cable. I changed wiring and cable, and then installed insulator. After all, sound was not better. Simple was the best.