Woofer motion problem.

For what it's worth, it is as much a part of the speaker design as it is the warp wow from your records. A vented speaker is undamped below its resonant frequency, hence the uncontrolled motion. I agree with El, it is unlikely to harm the speaker, but being low freqency in nature, it still eats up a lot of amp power and the whole situation seem quite undesireable.

The rumble filter is one solution, but you don't list your phono stage on your system page. Some phono stages have built in high pass filters or switchable high pass filters.

Viridian-- The turntable that I demoed on my system was not mine, I have not yet started to build my analog rig. At the time I had a Classe integrade that had a built in phono stage. I thought it might have been the amp, but when I play flac files that are recordings of Lps, I noticed that it did the same thing.

what are some phono stages with high pass filters?

Totem 1's are ported at 42 Hz. It looks like an underdamped high Q design. Whilst lota of semblance of deep bass is nice to have this means they are uncontrolled at 20 Hz and below (no acoustic damping at all). Large excursions can damage the woofers so do be careful. FWIW Most small ported monitors with big sound for a small box will tend to exhibit this lack of control.

Viridian...A properly designed rumble filter eliminates difference signal between channels, which is vertical groove modulation, and which constitutes most of the problem. Some overall attenuation below 20 Hz, such as provided by some preamps, is also desirable, but getting rid of the difference signal is most important.

By the way, when LPs are mastered, for various reasons, low frequency differential signals are cut, so you don't loose any real music signal when you use a rumble filter.

El, which is exactly why I agreed with you in my post. However don't discount that there is a consequence to every solution and the in-band phase shift of the rumble filter is one consequence as well as adding an extra pair of interconnects and the associated high-pass components, which is why I suggested a phono stage with a built in LF rolloff or switchable HP filter as an alternative as it would at least elliminate one more box and the associated interconnects.