Md-90 valve MonoBlock Power Amplifier VacuumTubes:KT90(specially)x4,6sn7(specially)x2 OutputPower:Ultralinear150W×2 Triode95W×2 OutputImpedance:4Ω,8Ω IutputImpedance:100K Sensitivity:1200mv DistortionFactor:≤1% Signal-to-Noises:98dB PowerDissipation:300W Inputs:1Groups Outputs:2Groups Frequency:20Hz-80KHz±1dB Sizeofoutercarton:L68xW36xH38(cm)x2 grossweight:25kgx2