I just bought a Mark Bass S450. I don't have speakers yet, but I will be buying the Bergantino HT112 and the other 112 (I forget what it's called). I just wanted to let you know, though, that when I did manage to plug in to the Bergies, the amp sounded great. I plugged in my Fender Jazz and my (Brand spanking new!) Lakland 55-01 and they both sounded great. Their sounds really came threw. Mark Bass aims at having no colorization in their sound and I think they've succeeded. Both basses were really able to let their sound come out and I couldn't be happier with it. I didn't see a lot of actual reviews for Mark Bass so I just thought some of you would like to read one.