Vibration Issues / Turntable Decisions

hifiron,
What are those unusual speakers?They look really good.Good luck with your vibration issue.

@roxy54  Thanks! They are Decware HR-1 radials, absolutely amazing! I'll try some bracing this weekend and report back on my status.

@hifiron - A few of different approaches....

1. stiffen the floor - probbly the easiest and most effective

You mentioned the room is over a crawl space
- go under the floor and screw a few 2 x 6’s under the unit (overlapping it by a couple of joists
- simply place the 2 x 6 flat against the joist and put a couple of 3" screws into every joist it crosses
- you will be very surprised at how much difference it will make

2. Magnetic Isolation
https://www.youtube.com/watch?v=74F7odDKL4Y

3. There are a variety of Herbies isolation devices that might work
http://herbiesaudiolab.net/special.htm

4. Employ a cushion isolation device under the TT.

They can be purchased online
https://www.amazon.ca/Auralex-SubDude-II-Subwoofer-Acoustic-Isolation/dp/B00DI5AXNI/ref=pd_lpo_sbs_2...

OR are simple to DIY...
- Build a box similar in size to TT base about 1.5 inches high
- place a bicycle inner tube insude
- place a piece of MDF on the inner tube (cut to about 1/4" smaller than the inside dimension of the box
- place a piece of granite on top of the MDF

The granite will stabilize the TT
- the inner tube will absorb the vibration from the floor and will not move the granite
- Drawback: you have to pump it up now and again

You could probably use the Herbies Medicine Ball in place of the inner tube - no drawback!

You really need to address the root cause - buying a different TT or cartridge will not do the trick

Hope that helps

I agree with Willy, support the floor from underneath first . That is your problem. Stop the amount of deflection there . Except I would support it across the width just in front of where the equipment is and support that on either end right to ground . I’m betting when no one walks on the floor and your in your seat listening your happy with playback so it isn't your table and wall mounts are not always the ideal solution. If the floor has that much deflection and the wall isn't an outside wall without a door in it chances are with a floor that bouncy it will only reduce , not remove the problem completely. 

Hello Ron,

A few questions on the rack build since that is the obvious issue causing the footfall.

How is the rack touching the flooring and are there any types of footers between the frame bottom and floor?

Is the rack inside the framework hollow or is there any type of bracing?

Is the frame 'X' braced? 

Based on these answers, there could be a solution that will also improve performance of the system entirety.

Robert
Star Sound