@lewm, I though your problem with your Sota was speed variation? The Sota's suspension lacks real damping so it will bounce if you get it started but since the sub chassis is enclosed that does not represent much of a problem. The MinusK platforms are not dampened either. People have complained of them bouncing if you lean on them. The heavy mass approach does not work well at all. Place you tonearm down on a record with the turntable off. Watch the woofer or subwoofer move. In you case it would be the diaphragm if you can see it. Have someone jump on the floor while you observe the woofer. With the Sota you will see nothing. That is working pretty good in my book.
@atmasphere , I know Ralph, that is why I always reference my opinion as coming from the distant past. I just love rubbing chakster the wrong way:-) The real issue for me is because of my long term use of subwoofers with ESLs isolation is more important to me than absolute speed accuracy although Sota's new drive seems to be very close to DD standards none of them have a suspension I would care to run with subwoofers and mine run 5 dB up from zero at 20 Hz which is what it takes to load the room correctly. I have had solid plinth tables here to set up for friends and even with a concrete floor the subwoofer drivers flutter.
I'm sure your plinth was better. If you have one of your turntables around it would be interesting to install Sota's Eclipse system and see what you get. If the wow and flutter are down at 0.03% or even less than 0.05% I can't see how you could want better than that. I think the SP10R is down around 0.02%. That difference is totally inaudible where as lack of a suspension is totally audible.
@atmasphere , I know Ralph, that is why I always reference my opinion as coming from the distant past. I just love rubbing chakster the wrong way:-) The real issue for me is because of my long term use of subwoofers with ESLs isolation is more important to me than absolute speed accuracy although Sota's new drive seems to be very close to DD standards none of them have a suspension I would care to run with subwoofers and mine run 5 dB up from zero at 20 Hz which is what it takes to load the room correctly. I have had solid plinth tables here to set up for friends and even with a concrete floor the subwoofer drivers flutter.
I'm sure your plinth was better. If you have one of your turntables around it would be interesting to install Sota's Eclipse system and see what you get. If the wow and flutter are down at 0.03% or even less than 0.05% I can't see how you could want better than that. I think the SP10R is down around 0.02%. That difference is totally inaudible where as lack of a suspension is totally audible.