1. Three vacuum tube 12AU7 for amplification.
2. Use of Solen / WIMA MPK10 capacitors, Nichicon Audio capacitors, BHC Averox / Philip capacitors, and Dale resistors.
3. Dedicated power and ground rails for tube power and tube filaments.
4. Symmetry in layout design for both channels.
Also, it can be reconfigured to the original Grounded Grid preamplifier. Fore more detail, please refer to the assembly manual.