PS Audio Modifications

In exclusive partnership with Parts ConneXion engineer Chris Johnson,Underwood HiFi is proud to offer the following carefully tested performance enhancement packages for the PS Audio GCPH.

By virtue of selling consumer-direct, we can offer these super-charged, brand-new models for a better price than the same modifications would cost retro-fitted - though we offer that, too.

The following details the Level 1 modification for the PS Audio GCPH phono stage [$700 for retrofit your GCPH]:

  • 4 x Japanese Takman ½ and 1-watt signal path carbon resistors with gold-plated leads 
  • 4 x Mur 860 Hexfred ultra-fast soft-recovery rectifying diodes
  • 4 x Nichicon ultra-premium 100uf 25v electrolytic capacitors
  • 1 sheet of Soundcoat chassis damping material 
  • 2 pair of premium WBT-0210-Cu direct gold plated over copper body RCA female jacks
  • 1 sheet ERS suppression paper to damp EMI/RFI
  • 1 foot of DH Labs 18-gauge Revelation Series pure 99.999% silver solid-core input wire with Teflon tape-wrap dielectric 
  • 4 x EAR small Sorbothane isolation feet to suppress vibration and airborne feedback
  • TRT WonderSolder used throughout
  • 4.5 hours labor
Read the 10audio review at: