2. Three vacuum tube 12AU7 for amplification.
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 200V AC(100mA) and one 12.6V AC (1A).
8. PCB dimension: 111mm x 220mm, thickness 2.5mm and 2oz copper, two layers.