12AX7 tubes

Thanks to a fellow audio friend who bought over some of his 12AX7 tubes so I can try them in my own system. All are new production with the exception of the Ei of which are no longer made. From left to right... Ei Gold Elite, Chinese 12AX7B, Mullard, Genelax Gold Lion, Sovtek LPS version, and Tung-Sol.

Done