These are part of the standard hifi series from Psvane offering excellent tone without breaking the bank. You can expect a rich and natural tone - a true workhorse tube. Unlike other Chinese tubes, these feature the typical 12AX7 plates in appearance, length and construction to that of tubes from yesteryear which gives them a sound closer to the originals. From our own observations these tend to come in toward the middle to low end of the gain spectrum averaging around 95. This makes them perfect for noisy or extra sensitive amplifiers. Psvane has quickly gained traction over the past several years as one of the premier vacuum tube manufacturers. Known for their excellent tone and quality control, you can't go wrong with these. These tubes are great for both hifi and guitar amplifiers.