AC 12V 6J1 Valve Pre-amp Tube Board Headphone Amplifier w/ Acrylic Case DIY Kits
Model: 6j1 tube (can replace the model 6AK5, 6AU6, 5654, etc.). 1 x 6J1 Valve Tube Preamplifier Board DIY Kits. Channel output: for the audio signal output, can be connected to the amplifier, power amplifier board audio signal input.