Cleeds, yes I read tea leaves but most importantly systems like mine are obviously very rare at this point. Few understand the basic issues involved so I am left waving the flag by myself. Which is ok by me. Anyone can ridicule me all they want. Until they have lived with a system like mine they have no idea. Now, people are always bragging about how great their systems are. La De Da. I could give two hoots about what people think about me or my system. I am only trying to give our members an idea about what is possible. But I'll also have to live with the fact that most people still think the earth is flat
Now cleeds, you seem to be confusing two issues. Good suspended turntables are immune to external factors. Like I said I can hit my turntable with a hammer with no ill effect as long as I don't hit it hard enough to cause a dent. Do not confuse this with the low frequency information that is on the disc in the form of warps and surface irregularities which a good system will try to reproduce blindly. If you have a system like mine which is dead flat at the listening position down to 18 Hz with 2000 watts driving each of four subwoofer drivers this spurious information will loosen the fillings in your teeth before it destroys your drivers. Blocking this information is I would think obviously critical in this situation. The only way this can be done without affecting the audio range is with a steep digital filter which I am fortunate enough to be able to program in my system. I hope this explained it adequately.