Adding to John. They are serious rivals for the Amati, they DO need serious amplification. Control is necessary in the bass. They have dynamics -- but again you need power to bring these to the surface.
I heard them with YBA Passion stereo and mono. The mono was considerably better than the stereo (which, with other speakers, it is not considerably better). Also, they're beautiful to look at, let alone listen to. Last, they're cheaper than the bigger brother (sister). Morale: If you can drive them acceptably to your ears, buy them.