PSVANE COSSOR 6SN7 Hi-end Vacuum Tubes. They look gorgeous - charcoal black coating inside the tube, enigmatic spherical shape, white base and what a SOUND! Just out of the box they delivered deep and tight bass, full mids and crisp highs, but by no mean any harshness. The gain is somehow -2.5dB lower against my KENRADs 6SN7 according to SPL meter. No hum, no hiss - very quiet valves. I have a lot of different 6SN7 (Kenrad, Raytheon, Sylvania) vintage tubes to compare with and these COSSORs are very competitive. I have no idea how they will sound after a 100 hours and how long they last, but for $150 including shipping they worth every penny! I wholeheartedly recommend these tubes as input stage of Shishido 300B amps.
Date Added: 04/22/2021 by Al** Krav**z
