How do I switch between 12SN7 tubes and 6SN7 tubes in my MZ2, MZ3, or MicroZOTL Preamplifier?

All Linear Tube Audio MicroZOTL products - the MZ2, the MZ3, and the MicroZOTL Preamplifier - can use either 6SN7 tubes or 12SN7 tubes. The important thing to know when switching is you have to change a setting inside the amp to to tell the unit which tubes you are using.

This video explains it all