After 6 months of use we can say that the product is pretty good bill despite concerns about some speakers (taken under warranty by the dealer) but could have been avoided if there had been greater control of output factory.
tried ALTO / QSC / FBT / RCF and opera are rather in the range medium / high, better than eg viola, equivalent to rcf but well below the QSC.
Lightness and rich bass quality are part of a rather flattering on her recorded music on the live ....?
Good Q / P
Profitable product, to see over time, we can not realize 6 months, they are able to make beautiful things, but should not be too much either.