SainSonic 6J5 Class A Vacuum Tube Buffer Classic 47 Headphone Amplifier Decode Audio Hifi Diy Amp with Power Supply
Features： Circuit：tube buffer+Classic 47 Headphone Using AC feedback two Dual-opamp NE5532 Tube：6J5*2 Dimensions: 100 * 70 * 24MM Frequency response: 20HZ-25KHZ Headphone Impedance: 32-300 ohm SNR:> 100db ChannelSale…