Markbass Little Mark IV

I first tried the Little Mark Tube (500W), which I liked its tube preamp sound, however, I found it is generating annoying noises while changing the master volume during play (which is a common problem to most of the LMT users) so that I decided to use the new LM4 with tube preamp (in my case LeBass from Two notes).
I found this setup an ideal one for me. I also like the dedicated mute button which is very useful. The Scooped switch/position will not give you the flexibility of the VPF (Variable Pre-shape Filter) however, it is working well enough in most cases (mainly for slap).
The old-school knob is also very useful for me.
Regarding the new bi-band limiter, I am not sure whether it is a type of compressor or tube distortion effect on high gain - I could yet find a demonstration for its functionality.