The thread title suggests footfall issues while using a spring suspended subchassis type of turntable. But the text of the opening post suggests an issue with a subwoofer which makes a loud "boom" that seems to be triggered by footsteps.
This to me suggests a combination of issues. But the "boom" noise coming out of your subwoofer suggests, to me, acoustic feedback. Is it possible that the turntable and subwoofer are in close proximity to one another? If so the simplest solution might be to move either the turntable or the subwoofer further apart. Or aim the subwoofer differently just to see if this helps to eliminate the "boom"...
Otherwise the issue of footfall and spring suspension turntables has been covered within this thread and many others more or less completely over the past 60 or 70 years ever since the AR-XA turntable was introduced in 1961..
I do have some experience dealing with spring suspended turntables, having owned a few Thorens models including the TD150, TD160, TD126, etc. And those will respond well to being parked on a wall rack. The idea being to decouple the turntable from the floor so that the seismic vibration of a footfall on a light flooring system does not reach it. Or there is always the idea of putting your turntable up on a true lab quality isolation shelf such as a Minus-K, or Vibraplane or Herzan. Any of these will decouple the turntable from the floor....for a price. But the wall mounted shelf would be the least expensive way.
And this would, no doubt, be of benefit even to non suspended turntable designs.
Still, based on the opening post I’m leaning toward this being a problem related to acoustic feedback which can be alleviated by moving either the turntable or the subwoofer.
-Steve
https://www.theanalogdept.com/what’s_under_your_table.htm
This to me suggests a combination of issues. But the "boom" noise coming out of your subwoofer suggests, to me, acoustic feedback. Is it possible that the turntable and subwoofer are in close proximity to one another? If so the simplest solution might be to move either the turntable or the subwoofer further apart. Or aim the subwoofer differently just to see if this helps to eliminate the "boom"...
Otherwise the issue of footfall and spring suspension turntables has been covered within this thread and many others more or less completely over the past 60 or 70 years ever since the AR-XA turntable was introduced in 1961..
I do have some experience dealing with spring suspended turntables, having owned a few Thorens models including the TD150, TD160, TD126, etc. And those will respond well to being parked on a wall rack. The idea being to decouple the turntable from the floor so that the seismic vibration of a footfall on a light flooring system does not reach it. Or there is always the idea of putting your turntable up on a true lab quality isolation shelf such as a Minus-K, or Vibraplane or Herzan. Any of these will decouple the turntable from the floor....for a price. But the wall mounted shelf would be the least expensive way.
And this would, no doubt, be of benefit even to non suspended turntable designs.
Still, based on the opening post I’m leaning toward this being a problem related to acoustic feedback which can be alleviated by moving either the turntable or the subwoofer.
-Steve
https://www.theanalogdept.com/what’s_under_your_table.htm