Description: Adopt 6J1 tube, the main filter capacitor is 1000UF/25V, and the coupling capacitor is 1UF. The resistor uses a five-ring 1% metal resistor to ensure a good signal-to-noise ratio. The PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and the whole process of tin-spraying ensures the good passing performance of the current. The input and output are made of gold-plated RCA lotus seat, which is durable and beautiful. The board wiring is reasonable, beautiful, and the current is small. Specification: RCA line output: 0.9vrms Signal to noise ratio: 98dB Distortion: 0.3% Frequency response: 20Hz-20kHz Power supply: DC12V/1A (DC) Size: Approx. 130x90x30mm Package Includes: 1 Piece Mini Amplifier 2 Piece Lamps