Electric Performance Index Output Power:25W×2(8Ω) Frequency Response:10Hz--32KHz(NF) 0Hz--22KHz(ON-F) Distortion:≤1.3% SNR:≥90dB(A) Input Sensitivity:Intergrated:≤280mV Pure post-stage:≤2V Maximum Power Consumption:≤550VA Load Impedance:4Ω-8Ω Tube:845 x 2 6H8C or 6SN7 x 2 2A3 x 2 Machine Size: 550mm(D)X 450mm(W)X 350mm(H) Package Size: 660mm(D)X 630mm(W)X 480mm(H) Gross Weight:about 52 kg Net Weight:about 45 kg