For a start replace the supplied Pangea spikes and pucks that came with the rack with something like the SVS Soundpath feet. They come with three different size screws included the needed M-8. Metal spikes on tile are not helping with the situation and in fact may be the main cause.
There are many other similar options available on Amazon or Ali Express.
That seems worth a try. I noticed a negative review of the Pangea rack the OP is using which mentioned the exact problem he is having. Their problem was solved by moving the turntable off the Pangea rack.
Pangea has found a way to amplify normal vibrations to exciting levels most people donāt experience. And at bargain prices!
And if like the rack, the speakers and subs are sitting on that tile floor with spikes and metal floor savers thatās making the problem even worse. In that case you may need to decouple both from the floor.
Yeah that looks exactly like turntable rumble / uneven record surface type movement.
A high pass filter on or after your phono preamp is likely the only way to resolve this.
Worth doing, I think, as it uses a lot of power in the power amp (leaving less for actual audible stuff / dynamics etc.) and will generate heat in the power amp that would otherwise not be generated.
It also puts unnecessary strain on the drivers.
They may be able to cope with it but still doesnāt feel right.
Have you tried putting any sorta iso pucks under the feet of your turntable? Pro-Ject & Audioquest both make TT specific puck/feet. So does isoaccoustic, and Iām using a brand that Iām blanking on but were pretty cheap and made an enormous differenceā¦.
Herbieās Fat Dotās are one and I have them under the feet of my TT.
This will do the trick.
Moohaha
Happy Cake Day Rick!
Indeed! Happy cake day buddy!
I have been trying some of the low hanging fruit suggestions, towels, Isoacustics pucks, moved the turntable further from speakers and subs, and also off the Pangea rack. No progress so far.
I have ordered some Herbie Fat dots and sorbothane feet to try which I have not received yet.
External vibrations may play some role but the main issue seems to be resonance introduced by the turntable itself, like @joma0711 suggested, most likely from the tonearm.
PS: Happy Cake Day @weedeewop
The Ultradeck came with what they claim to be Ultra Low Noise Isolation Feet but I tried some Isoacoustics pucks.
I have some Gaia feet I want to try but the turntable screw socket threads are not one that comes standard with the Gaia set.
Some preamps, Audible Illusions for example, offer a selectable high pass rumble filter. Just a thought.
Sorry I havenāt read the entire thread, but if this happens only with vinyl, have you verified that your vertical tracking force is correct?
Maybe try a Schiit Loki Mini thingy. The 20hz band when heavily cut might provide something thatās effective without losing too much real useful bass.
One isolation device from years ago that was fairly effective in addressing turntable feedback, down to 3hz was Max Townsendās Seismic Sink. A HiFi Shark search should locate on or two available for under $300. Basically a poor manās vibraplane. It is tuned by varying the air pressure.
You know I have seen the discontinued Townshend Audioās Seismic Sink recommended by REL as well on their website, but I have not been able locate one in decent shape yet however I am keeping an eye on it.
The tonearm and cartridge came pre-installed and adjusted by the manufacturer. All I had to do is set the tonearm counterweight into the recommended ānotchā for the cartridge.
I will double check this I just did not want to mess with the adjustments as I am quite a newbie when it comes to turntables but I am a fast learner 
There is one on eBay. I canāt vouch for the condition.