Placa preamplificadora de tubo de vacío HiFi 25W 6J1+LM1875 preamplificador de audio estéreo auriculares
2: 6J1 school sound, soft and sweet sound. Features: 6J1 school sound, soft and sweet sound. Channel: 2 channel stereo. Arduino Module. 4: Overheating DC short circuit protection. Protection feature: overheating DC short circuit protection.