All user reviews of 4/5 for the QSC USA 900

I possde this amp for 6 months and I used ennormement and I can tell you it's a good bte. The conector good quality sober and Dt function of qq com: cheap shot 30/50 hz parrallle limiter and it fits perfectly for a mobile disco associated with two speakers in good used qualit.je warfedale TEUs with 15 (no top) but in bridge mode on a 900w subwoofer provides the same ... I plan to buy a second to power two subwoofer. I do not think you can dir it's the best amps but it is classified in a good solid amp (use the trance psych.j 'I almost forgot a slight breath and trs shock if qq Power is not stable (eg lighting of a neon).

Unlike the opinion below the United States QSC 900 provides a function that allows parallel chain of several amps.