I use it for only one month and a half. I tested it in concert. I was surprised at the result! It really sends the power! Jai speakers 400 watts! And that's enough for it.
I do not know if I am objective as it is the first power amp I buy but I'm still well informed before making this choice (almost a year). I do not really regret it.
However, is it normal that after a week he receives more signal in stereo. Jai's bring it to the store one month after purchase. It's not cool at all even if java to pay anything. So, I wonder if this product has a good life (jai's fall on the wrong series!)
I put that 6 because of the failure after a week!