Best 6922/6dj8/7308 Siemens 7308/ECC188.A freind who has tried over 20 different tubes from the 6922 family recomended it.Its is the best tube i have ever heard.I put it in the Output stage of my CD Player.The same night my wife sat down and after a few seconds was asking what ihad done to the system.She commented that i must of spent a thousand + to get this improvment.
