Hello, I've made a search and only found a few infos about Noll preamp. I know that a few TBers have tryed this preamp so could you describe it sound ? I'm looking for something more transparent and more dynamic than my Bart 3 ways. Possibly the 3 ways Noll pre with parametric mids or the four ways with 2 mids control. Opinions ? comparison with Agui, Bart or Demeter ? U-retro was also an option but I heard a lot of people said that this preamp realy have a colour of it own and it colours the bass sound even when setting flat. Thanks for your help Sheers Shiveringbass PS : it will be associated with Bart passive soap bars.