I do not have the Maxx II's but have heard them at a local dealer being driven by VTL S-400 tube amps and the sound was terrific. I have Watt Puppy 7's and previously owned a pair of Sophias. Since there is what I would term a Wilson "house sound", I believe my experiences would apply to some degree to the Maxx II's. It is my understanding that Wilson uses Audio Research tube equipment to voice their speakers and I had great results using an ARC VT-100 Mark III tube amp on my Sophias. I also liked a Conrad-Johnson Premier 140 on these speakers. I did not think using a 15 wpc SET tube amp drove the speakers well enough and they were dynamically compressed. The WP7's are a more difficult load for amplifiers, but tube amps gave a big soundstage with a liquid, detailed midrange and good bass. That being said, if you really want to hear what the Wilsons can do dynamically and basswise, which IMO is what they do best, nothing beats a solid-state amp. The trick is to find a SS amp that doesn't sound flat dimensionally. I tried BAT and Classe SS amps that just didn't do it for me as the soundstage depth was curtailed. Finally I tried Essence SS amps and they are hands-down the best amps I have ever heard with the Wilsons. The Wilsons will definitely let you know what electronics are upstream, so it is worthwhile trying different products.
