I for my part, unwanted for 1 year and RAS ... I bought it more to my satisfaction SLX 600 II and ditto it works great. I can one surprised by the first post because I also used to power 4 15 Delta DIY BassMédium boxed and out put a human error (which has scorched me 1) I am very satisfied ... The only downside: weight ... And unlike its little brother I had trouble aucain connectivity ... I also counsel for the budget ...