Hi Bob,
I have used the Black Treasure KT-88's and I like them very much but never tried the CV 181. You might want to try the Chinese 6N8P-J military tube. They work well in my pre-amp and they are cheap.
I have used the Black Treasure KT-88's and I like them very much but never tried the CV 181. You might want to try the Chinese 6N8P-J military tube. They work well in my pre-amp and they are cheap.