2. Three vacuum tube 12AX7 for amplification and one 6F3P (6BM8) for regulation.
3. Use of WIMA MPK10 capacitors, Nichicon Audio capacitors, BHC Averox capacitors, and Dale resistors.
4. Built-in rectification and regulation circuit.
5. Dedicated power and ground rails for tube power and tube filaments.
6. Symmetry in layout design for both channels.
7. Power requirement: one 260V AC(200mA), one 15V AC (1A), and one 6.3V AC (1A).
8. PCB dimension: 110mm x 250mm, thickness 2.5mm and 2oz copper, two layers.