Preamplificatore valvolare 12AU7 ECC88 preamplificatore completamente bilanciato riferimento circuito ARC di ZHI
Use 12AU7 x 2 pcs, ecc88 x 2 pcs, 6x4 one peice (not incldued in the kit). (there is no instruction, part list, need DIY electronic knowledge. there is risk of failure,you need to know how to make tube preamp work.).