My stock power tubes are EH6550. I have been using GEC KT88, much better sonically. You should replace the stock input tubes, which will result in big improvement. Syl 6sn7w will shine from top to bottom. And RCA 5891 is a good match. The final result is the brilliant sonic house blowing up lots of much more expensive amps. I will be trying the GEC copy version of the Chinese KT88 very soon.
Tube rolling in Cayin A-88T
Anyone changed out the stock KT-88 tubes?What have you found that beats the stock jobs?..I understand Cayin uses the Shuguang KT-88. As good as these are, they are the 3 hole plate which is said to be inferior to the solid plate version. Can anyone comment in regards to what they are using? Thanks.