Matching the 'speed' of an AMT (or a ribbon, small planars, and the like) almost requires crossing over to a smaller woofer properly.I have Mark & Daniels first iteration of their Ruby loudspeakers and this is basically what they did. Their AMT tweeter covers 900Hz on up and their 5" woofer handles the rest down to 45Hz. Terribly inefficient little beasts (82.5dB/2.83V/1m) but they sound fantastic driven properly.
