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