These tubes are highly regarded and very sweet sounding. These are the grey plate versions, I also have other grey and black plates and honestly there is not much difference between them. The full test report is on the tube boxes. I paid good money for them if I recall as they are selected for noise/microphonics, they are very quiet, -86-87 db! Used for a few hours by me that's it.
$40 shipped within CON US via USPS.
