When demoing at shows, ambient noise levels and traffic are usual higher than that of a normal demo, i can see Wilson using high powered SS amps to achieve the necessary Db levels required to show off the Maxx's dynamic capabilities and qualities.
Based on the Maxx's tested efficiency you will need 500 watts min for 98 db music peaks at a listening distance of 9 ft.
Unless you listen to music moderately and very rarely venture beyond 92 dB you will need an amplifier with at least 500 watts /ch IMO.. Bi-amping might be the best choice...
Regards,
