As a current owner of a Sadowsky, the preamp feels special because it boosts in ways that don't feel oppressive. When I boost the treble, the bass sounds sweeter and more modern, but I don't fear it getting "brittle" or harsh. When I boost the bass it just sounds bigger, but not boomy and I don't lose any of the articulation. I just get to decide how forward in the mix I'm going to sound, and it just feels very well thought out frequency response-wise