I have a MM16 POS firewire.
I love it when it works properly but my unit must have been put together in the dark. Literally 10 minutes ago I look over and I am getting the clipping light. Well im not even using it. nothing is plugged in. this happened before and Alesis fixed it. I shipped it to them. This was in fact the 2nd time I shipped it back to the company.
FWIW, i would shop around and stay away from this unit. Even at its now low cost. There are so many things out there that must be more reliable.