adiola Balanced Amplifier トランス m0o2994si|アンプ,CADISI hifi Class A 4.4 Fully Balanced Headphone Amplifier, Total Harmonic Distortion: 0.005%, with 4.4mm recording cables - AliExpress,Topping B200 Mono Pure Power Amplifier 3 x XLR/TRS Balanced Input 200W Output 2 Gain 12V Trigger High Power NFCA Discrete Amplifier(Black),Sanpyl Dual Op Amp, LME49720HA HiFi Amplifier Board Upgrade AD827JN AQ NE5532P OPA2604AP OPA2134PA AD712AQ, Used in Decoder, Music Player, ,Project 78: LTC6090 Op-amp and 2SC5200N in a Quasi-complementary Topology Audio Power Amp Project.