I recently upgraded my amp. I went from a GK Backline 210 to a MarkBass CMD 102P. It was a great amp but it just sounded to sterile. I also couldn't get past the tweeter hiss. Yes I know you can adjust the VLE but that make a lot of the VLE range useless unless you want the hiss. In addition, the support for MarkBass is basically GC. If you blow a speaker you've got to send your damaged one to Italy and await the new one. That was a major concern. I returned it and ordered a Mesa Boogie WalkAbout Scout. Wow, the sound is a lot richer than the MarkBass. It doesn't have that high-fi sound of the MarkBass. It is heavier but it is built to an even higher quality than the MarkBass. IMHO, MarkBass make an excellent series of bass amplifiers, but the Mesa Boogies are in another class.