Studio Projects VTB-1 Tube Microphone Preamp & DI

This is a mic preamp and DI with a control to blend between tube and solid state amplification. For the tube section it uses a 12AX7 twin triode while the rest of the unit uses low noise op-amps. I primarily use it with my 8-track for recording. It's a very good unit and I plan on buying more as my budget sees fit.