Description: This machine uses a single 12V AC input, the circuit processing provides 6J1 tube needed positive and negative voltage and filament power supply voltage. Power works: an open power tube filament heating is started, when the boost from the zero-voltage start boosting hot filament tube, etc. Also happens to boost boosting finish, so this is the same with the guts rectification, 8 470UF the capacitor filter very clean, good power supply system will not have a hum. the filament is 12V DC power supply, need two filament tube is connected in series with a DC filament also in order to reduce the noise. With high quality and durable performance. Specification: Material: PCB Board Channel Type: 2.0 / stereoit Power input: AC12V1A /5.5*2.5 plug Knob functions: power switch / volume control Color: As Pictures Shown Size: Approx. 77x 75x 52mm/ 3.03x 2.95x 2.05inch Package Includes: 1 Piece Digital Power audio amplifier Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test
