Much easier just to use the
resonance evaluator over at Vinyl Engine than resort to mathematics, but you have to be registered there to use it. Are you sure the actual dynamic compliance at 10Hz is 17? It's actually very difficult to apply a broad assumption to 100Hz specifications, to get 10Hz dynamic compliance. In any case, when
Paul Rigby reviewed the Hana ML, he used an Origin Live Enterprise 12" to good effect, and that arm's effective mass is somewhere between 16g and 17g, so I would not worry about arm mass being theoretically a touch too high. And 8Hz is not too low.