Up for sale is a rare Single Power PPX3-6SN7 headphone amplifier. It was purchased new by me from Single Power in 2004, and in very good condition. Please note this is a 230V unit. It was purchased with upgrades including the Piltron transformer, upgraded capacitors, internal silver rca wiring, and furutech power inlet. Also included: Sylvania 6SN7W and 2 x Hytron 6SN7GT with same date codes. Selling for USD $750 including which includes free express EMS shipping from Tokyo. It takes around 3-5 days to Australia and Asia, and 1 week to UK and Europe. If you have any questions, just send me a PM! Thanks for looking.