Features
U.S. ARC SP10 classic pre-amplifier, 100% original circuitry.

Vacuum tube use PHILIPS 6922 with green marking, which is compatible with ECC88

Rectifying tube GE 12AT7:
Rectifying diodes are fast BYM26C

The ARC SP-10 original rectifying and regulating circuitry, the IC are D40K1, TIP42C, and MC34001P
Denmark coupling capacitor JENSEN 0.22uF/630V (pure copper foil and silver leadout)

Germany Output coupling capacitor ME-CAP MKP 10uF/400V
U.S. IRC Resistors

U.S. RA/L, IRC resistors

U.S. High-End DADDOCK MS resistors
