#1
Looking for attenuator and impedence matcher to connect low-Z line level to high-Z guitar level guitar jack of tube amp so that music and a mic can be played at the same time through the 100 watt tube amp as a guitar by putting a solid state 15 watt head on top of the 100 watt tube head and connecting the solid state head headphone jack to some sort of attenuator and impedence matcher to connect to the guitar jack of the tube amp.

Does what I desire exist, or is it not possible and I am stuck with only connecting the solid state head to the cab to play music and mic and then disconnecting the solid state head and connecting the tube head to the cab when I want to play guitar?

Alternatively I could just simply buy another cab just for connecting the solid state head to for music and mic.

So would what I suggested be any cheaper than simply buying another cab?