Level-1 modification

The following details our Level-1 modification [$880 + freight retrofit; preinstalled):


  • 1 x dual Burr-Brown OPA-627AU op amp module (using two single op amps mounted on a custom DIP adapter)
  • 2 x Mundorf M-Cap metalized polypropylene output coupling caps
  • 1 x Russian E-H 12AX7 tube
  • 2 feet of DH Labs 23 gauge pure 99.99% pure silver solid-core hook-up wire with foamed Teflon tape wrap dielectric