I own this amp since January 2007 and have been able to detect any defects.
The performance is to house more than adequate.
The creators of the negative reviews of the article I assume a simple overload, as this is now time not a total replacement for a professional club system.
It should be looked at signal strengths and stress seems to be quite - it all depends on on which terminals are to be serviced by the amplifier and want to be heard on what level usually.
Good audio technology costs also really good money!