4971759172452352 Luen Hing Electrical(HK)Limited Unison Research Unico 90 Integrated Amplifier - 100w ECC81 Unico 90 is a class AB hybrid integrated amplifier with zero feedback, as the most precious valve amplifiers uses only two stages. The heart of th Product #: luenhingelectricalhk-Unison Research Unico 90 Integrated Amplifier 2022-10-24 Regular price: $HKD$28000.0 Available from: Luen Hing Electrical(HK)LimitedIn stock