Furutech's "NCF Booster Series" is an accessory that can be easily used around cables and terminals and greatly improves sound quality. Since the introduction of the first NCF Booster, it has continued to evolve with its unique know-how and development capabilities, creating a lineup that can be used in a wide range and producing innovative effects, and has been well received around the world. This time, the latest two models of this series, "NCF Clear Line" and "NCF Booster-Brace-Single," have been introduced to Mr. Obara's home, which is thoroughly maintained from every angle, including the power supply environment. We report the effect on sound quality around digital and analog, which has already become a necessity.