lewm, thanks for sending the message. "Perfect speed stability" means PERFECT SPEED STABILITY or the ability of a particular turntable to rotate at 331/3 rpm, to play a LP, without any deviation. Think of a bearing that has, by far, the lowest friction of any turntable made, from my experience. Mine took 7 minutes to stop from 331/3 to zero. Add a very special PS that has the ability to "drive" the normal 115 v synchronous motor at a half voltage, about 60V, to reduce motor stress + the ability to provide each field coil of the synchronous motor with its individual power supply, with one shifted the necessary 90 degrees, and you have a "perfect speed stability", checked with my laboratory instruments. For other information please ask the manufacturer. We (for the people living in the US and many other Countries and me, that live in Brazil) live in a healthy democracy.If you are not comfortable with this thread, please "unfollow" it. I'm not here asking Audiogon members to promote anything, just to share, if they want, your toughs and feelings about their analog systems.