Buffer Preamplifier Preamp PCB Board. Musical Fidelity 6N11/6922/6DJ8 Vacuum Tube. This is Bare PCB, not included any other components. 1pcs x Bare PCB Board. This is a simple structure, sound good pre-buffer circuit having ultra-low noise floor, while adding second harmonic distortion in the music, the sound is more resistant to listen more flavor!
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