AMT M1 vs M2 vs P1 vs Marshall JCM900 SL X

I realised recently that despite I ve been using all of these for a long while I have never compared them so I made this quick reference video just for myself. Maybe it can be useful to someone else, too. For my surprise, the tones ended to be quite similar but they weren t intentionally matched at all, the knobs stay where they just were set during the last use. I guess, I just chase the same sound regardless of the actual unit. As for a conclusion, I think all the AMT preamps did an awesome job. Wired t