Pretty PI boost

[Kazoki]

  Suggestions for Hammond a-22 ( ?) Amp, it is 12au7 I feeding p-p pair of 6l6. I want to feed it signal from  a Box Stomplab2G, but the line out setting seems same as "amp" setting, none of the four settings for output as anywhere near as much as my Katana,  zoomR-8.
. I assumed the line out of G2 would be enough...but it's not anywhere near "line" of other line out signals.