In my experience, swapping either the 845's or 300B's can significantly change the sound. The 6SL7's make less of a change.
I have experimented with Shuguang 845's, 845B's, and 845C's. Additionally, I have tried KR 300B XLS, 842VHD, and new production Western Electric 300B's. I have tried various brands of 6SL7's including RCA 5691, Philips 5691, Tung-Sol, Sylvania, GE, and standard RCA.
After all the experimentation, my favorite combination is:
Shuguang 845B
Western Electic 300B
General Electric 6SL7GE with the wire top getter
Hope that helps,
Jeff
I have experimented with Shuguang 845's, 845B's, and 845C's. Additionally, I have tried KR 300B XLS, 842VHD, and new production Western Electric 300B's. I have tried various brands of 6SL7's including RCA 5691, Philips 5691, Tung-Sol, Sylvania, GE, and standard RCA.
After all the experimentation, my favorite combination is:
Shuguang 845B
Western Electic 300B
General Electric 6SL7GE with the wire top getter
Hope that helps,
Jeff