Sorry that I can't actually answer your question, but I'm going to chime in anyway with some thoughts and suggestions. Many people used old Marks as pedal platforms, one of those artists was Prince (as recently revealed). Since the amp is based off those amps, I would say that it is still a very good amp for this. I can't that say too many people will be using the amp as a pedal platform which is probably why no one has responded to you as yet, but I would say the amp does a good job of it considering it's origin. The only downside to this is that you are wasting a very large chunk of the amp's usefulness by doing so, which is why I'd say get an older Mark (1- 3) for half the cost and next to no difference in tonal quality.
