Low Frequency Rumble from TT between songs

Thanks. Of course I have now sold it. Decided to start a Garrard project 401 and get the heck out of the VPI universe.

Yeah, it  wouldn't be rumble. Acoustic feedback. But the table's been in the system for a couple years but the speakers have been here for 3 months and the noise only started a few weeks ago. Driving me nuts trying to figure it out. 

It's definitely different on every record but still there on everything. 

I tried moving the speakers away from the table and that for sure lessens the sound. It's clearly an interaction between the two components. The bad part is we live in a small place and the speakers can't be moved and neither can the turntable. 

Are some turntable less susceptible to this interaction. I'm using a VPI Aries 1. What type of table should I try? Suspended? Idler? Or is the cartridge picking up the sound so it doesn't matter?

If I place the turntable on it, will it decrease the feedback?

Do you hear the rumble just turning on the VPI player (on high volume), or only when the stylus is in the record groove?

No. Only when the needle is on the surface of the LP.

No. Some are less than others but they all have it.

I'm using Edensound TerraCones on my Aries. The Townshend is about $1k for my table. Pretty steep.

It's definitely a low frequency sound wave, not a rumble, not surface or groove noise.  I'm going to try a suspended turntable just to see if that would be a potential solution. I

Just to follow up in case anyone is interested. The low frequency rumble is being picked up by the SET amp I'm using. It's in a weird bass trap spot. It goes away when I swap amps to SS. I'm plugging in a subsonic filter tomorrow to see if that helps and if there's a sound penalty. 

I had the same thought about microphonic tubes but I swapped in a whole new tube set and no change. I should borrow another tube amp just to test that as well although I'm pretty excited about the First Watt SIT-3 I just bought.

Just to follow up, the issue was isolation. I was able to get rid of the noise completely with a set of MNPCtech feet and some small rollerblocks under the motor pod. 

Also the First Watt is not as pleasing as a SET amp, no way. It does a lot of things really well but it left me missing the 300Bs.

It left me missing air and walls. As someone who often records live instruments tangential to the music industry, the 300B comes closest to recreating the instrument AND the room that the music is being played in, which makes for more accurate reproduction of a setting. Digital playback can be music in a vacuum which to my ears doesn't sound like life.

Accurate to what, though? What you think an instrument sounds like in a vacuum or what you think an instrument sounds live or what I hear when an instrument is actually recording in the studio? Or some other measure? You seem to describing an absolute without identifying the standard.

No, it was these:

Feet