Got my hands on a Ashdown Classic Tube Magnifier 300W and profiled some settings of it. You can find it via Rig Exchange, just look for "HannesVC".
01. 12 oclock settings with 9 o'clock gain
02. -//- with 2 o'clock Gain + Shift+Bright
03. Same with Mellow Gain, Deep Bass, Shift and Bright
04. Same with Deep+Shift+ added EQ, Gain and Green Scream from Kemper
I hope you like it !