I had ML Vantage's on the 990 w/ a 7700 but am now running the ML Summits. I can drive either speaker to an uncomfortable volume level or to infinity and beyond (popping and clipping all the way). For the money the Outlaw gear does an admirable job. I'm currently in the process of trying the speakers with Simaudio product, a pair of W7M monoblocks and the P8 preamplifier.