Working voltage: DC15 to DC60V: 20- 200W 8 R+N Less than 0.01% 50W 8RMagnification GAIN = 34 Input sensitivity 1.5V consumption Less than 5 (40V)PCB size 96x51mmThe tube uses ST 2SC5200 (230V, 15A, 150W)All products do not have circuit diagrams. Please 't buy if you mind.All amplifiers are precisely measured by instruments, and the official sales version will be released after adjustment.The following introduction will contain SYS 2 test data.Due to the amount of test data, only commonly used test materials are introduced.Strictly measured by , the effect is completely preserved.Output 50 into 8W100 into 4W Less than 0.04% 20Hz-20kHz unweightedLess than 0.01% 20Hz-20kHz'A' weighted Less than 0.008% 20Hz-20kHz @ 1W unweighteFrequency response + 0.2dB 20Hz-20kHzS ratio greater than 102dB unweightedgreater than 114dB'A' weighted consumption 120WX2 kit components all adopt imported three-stage tubes. Imported capacitors.Colour:As shownMaterial:PC+MetalPackage Contents:2 x Audio Amplifier Board (Finished board)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.