What a surprising nice sounding tube! If you want classic 'tube sound' this is for you. Sultry midrange, nice tube bloom in the bass, non-fatiguing silky highs that you can listen to all day long. I currently use a pair of these tubes as phase-splitters in an Icon Audio Stereo20 PP Integrated amp. The rest of my tubes are JJ's, and these two ECC82's mate very, very well. That said, it isn't without imperfections. Sometimes that bass bloom crosses the line into boom on some material. The soundstage isn't as large as it could be, staying well confined between the speakers. Although the image depth is quite nice and makes up for that a bit. Also, those silky highs lack some air and bite at times. This is definitely a 'tone trailing', and not a quick 'leading edge' tube.