Electro-Harmonix Gold Grid 6SN7 (Preamp Vacuum Tube)
Pemium gold pin version of 6SN7EH. Super low noise, hi-fi medium-mu octal twin triode preamplifier tube.
From EH: "High quality 6SN7 tubes have virtually disappeared... until now. The 6SN7EH tube is a beautiful sounding tube, on par with RCA's red base 5692 tube. It maintains a linear response while being able to accept a full voltage. Vintage tube amp users and audiophiles will be thrilled to find that a superior quality, ultra low noise replacement 6SN7 tube finally exists."