I recide to open my code 50 cabinet. It was not just a simple sound change matter. For me this cabinet is the low point in the project. With this upgrade I believe now th speaker moves freely. Of coarse you have all those open cabinets advantage, more crystallinity, less punch low freequencies, more spacial sound distribution (less directionality)... For me the stage effect was quite positive. Some time ago I was really deciding to kick it out but now I am very satisfied with this little amp.