JD-402

New Jolida JD-402 tube tuner modification Jolida JD-402 Level-1 mod [$400 retrofit] - 

Our Level-1 mod installs

  • 4 x small EAR brand compliant Sorbothane isolation feet 
  • 2 sheets of SoundCoat chassis damping material 
  • 3 feet of DH Labs 23-gaugepure 99.999% silver signal wirewith foamed Teflon tape-wrap dielectric 
  • 2 x Auricap signal path metalized polypropylene coupling capacitors 
  • 3 x Soeln feedback coupling and power supply decoupling metalized polypropylene film capacitors 
  • 12 x Kiwame brand carbon-film 0.5 and 1-watt signal path resistors 
  • TRT WonderSolder used throughout 
  • 3.5 hours labor

Sonic changes of the Jolida JD-707 Level-1 mod:

  • The preamp is quieter and the silences are blacker.to resolve more low level detail, ambience retrieval & three-dimensionality.
  • Transparency is greatly improved as though a slight veil over the music has been removed.
  • The unit is now more dynamic and seems to play louder, with greater dynamic contrasts.
  • Imaging is better defined and the soundstage is much larger, wider and deeper.
  • Bass is dramatically improved, with fuller weight, authority and more impact like solid state preamps

We also have a Level-2 mod $990 plus freight ($600 retro-fit) that adds the following to the Level-1:

  • 1 pair of Mullard CV4024 super 12AT7 tubes; 1 matched pair of Svetlana nickel-plate "winged C" 12AX7 tubes 
  • 4 x IRF Hexfred soft-recovery ultra-fast diodes 
  • 6 x Vishay-Telefunken soft recover ultra-fast diodes 
  • 2 x Blackgate FK and NX Series power supply electrolytic capacitors 
  • An additional 1.5 hours of labor for a total of 5 hours.

Compared to the Level-1, the Level-2 is more dynamic, has a more liquid midrange and is overall a little better in almost all areas.