We showed with Dynastats at the summer CES in Chicago in the early 90s. We used our 60 Watt M-60 amplifiers, which had far more power than we could use in that room. So I think you don’t need a particularly powerful amplifier but you do need some power.
I think they made a change to the Dynastat sometime in the mid or late 90s that, like changes to the rest of the line at the time, made the speaker much harder to drive. As best we can make out its an error in the crossover and it might be worth it to contact Sound Lab as there may well be an update for it.