Smash
Hack
If you have someone that founf the magical combination of tubes, 99% of the time in their madness they finally stumbled onto a good eq. Because it would be ridiculous to roll tubes and not adjust the eq each time. Some of them have tons of low end or are brighter by nature. You probably have some idea of the eq you like. You would be better off just working on getting your eq right without messing around with the magic secret tube combination