Cayin is one brand name of Zuhai Spark, a Chinese hi-fi specialist operation. Its amps are all valve-based designs running the gamut from relatively pedestrian valves, like the KT88 and EL34, to the exotic-looking GU29. The Cayin A55-T is one of the most comfortingly traditional models in the range, using a familiar line-up of four KT88 valves, plus two each of the ECC82 and ECC83.



Link: Techradar