Well, well, I may be the dcevoir expectancy at certain but it may be that the clown ptits Alesis does not even test the equipment before swinging in a box. I bought mine and I did not put more than two days before I realized that the right exit silent borked.
It got worse in a month until the output is odd hacks and interrupt / Ractive the left during his ptags of lead, so impossible to work with an amp dfectueux at this point without tripping itself same .. the only solution I found: return this widget factory and work with the cabinet on the left only until the replacement ..