DIY TT

A recent new Member to my local HiFi group, has been quite impressed with the Isoacoustics Oria Footers that they have been loaned to try out in their system.

Following the experience with the Panzerholz and the AT 616 Footers the same person has sent out a link to the HiFi Group of a device they are considering buying for there TT.

It looks like it is a substantial piece of kit and hopefully if acquired it will prove quite valuable to their set up, it can be seen in the attached link.

I have set speakers up in the past on Heavy Plinths with AT 616 feet under the speakers and got very pleasant results.

I have set up similar methods for others, using their speakers and the result has been either Isoacoustic Gaia Footers are now in use or a Townsend Sub Base.

The Footer I use directly in contact with my TT Plinth is the Solid Tech 'Feet of Silence'. I have yet to have this footer improved on.

My assessments are subjective like 1000's of assessments, I don't measure such things, as I don't know how to do so accurately.

The most commonly used vibration measurement methods, which are using  accelerometers and laser devices as the methods to measure are not suitable for vibration measurement of micro vibrations. The methods referred to as Optical interferometry has the advantages of being a non-contact system and measures to a very high accuracy.

Devices to measure ambient vibration accurately and that can supply a trusted reading of a condition that can have a detrimental impact on a stylus when positioned in the LP groove are not very affordable, and are certainly not on any HiFi enthusiasts that I know equipment list.

I do believe there is a lot more available to impact on a stylus in a detrimental manner manifesting from within a Bearing Assembly, Bearing Housing Mounting Method or from the Tonearm having design flaws where bearings are as friction free as can be or internal wiring is restrictive to free wand movement. 

If the TT and Tonearm have both cncerning conditions in conjunction I don't think knowing about ambient micro vibrations and putting in control measures is going to have too much a impact on the overall situation. 

@vinylzone , I hate to tell you this old man but that is a fallacy. Just like air sound travels through the ground in waves. As a truck rolls down your street your cartridge can hear that right through the concrete. Your cartridge can also hear a lot of other stuff like your washer machine being unbalance and your refrigerator compressor starting up. It can also hear your HiFi System. Does not matter what you have the turntable on certain frequencies will make it to the cartridge by direct mechanical means or through the air. All this is distortion.

Towards the end of this demonstration there is an example of house rumble. Watch it! 

@mijostyn

In the video, the turntable is on a floor stand. Mine is not. I do not have any vibration or rumble issues in my setup, Springs isolate in both directions, and while they may help in some situations, can also prevent passing higher frequency vibration from the platter/plinth back down to any platform or subchassis that a turntable might have.

If I recall correctly, which I may not have, you experience this as feedback some time ago and had to take other measures to mitigate it.

Dear @vinylzone  : " I do not have any vibration or rumble issues in my setup, "

How do you know, how can you be so sure?

I ask because time ago I was sure that my analog rig was free of any kind of generated distortions related as what we are discussing here with you.

A few months ago my friend Carlos came to my place and we were listening MUSIC, mainly classic because he is a Simphonic Orchestra player. Obviously that he is accustomed to listen at high SPL as in a live even seated at near field. So in one LP ( non classic score but Asian drums. ) with SPL over 95db and with a low bass reproduction part the windows started to vibrate... after that I told you Carlos if that vibrations affected the other frequency ranges ( mid/high ) sk if he detected " something " and like me he told me that does not detected any kind of " problem " about.

I took that experience as a confirmation that my analog rig was safe of that kind of " events " but I took a road to eliminate those window vibrations and in that road I find out that even that my friend and I can't detected any proble at high SPL with a high resolution full frequency response ( at least 16hz to 50kh) system in reality was not totally safe.

Total isolation of the TT/toneam/cartridge is not an easy target even if the analog rig is in other room. It's common sense and can bre preoved using sciene/measures and you are tell us that have a total/perfect isolation.

Something very good or bad in your system that I don't know its items, I think you have the small Maggies, Herron or something similar and what we look in that picture of your analog rig.

I have no questions for me, I know the answers. You need to make to question  your self about.

R.

@vinylzone To not detract too far from your entrance into this thread, I believe your  TT with the new adornment of the Maple Sub Plinth has improved on the role over the Plywood it has replaced.

I know this wood is selected for use in musical instruments for its damping properties, and more importantly how it impacts on the overall structure of the musical instrument when present and carefully attached, I would class this as a complex structure.

My structures produced are not complex and I have even produced a structure that can have a Sub Plinth in suspension on O Rings, a little like a SME Suspension Method.

I chose not to follow up on this method as it was precarious and not really trusted with valuable equipment sat upon it.

The Solid Tech 'Feet of Silence' have offered a variant of this type of a suspension support, and have been very satisfactory and remained as the most valued footer.

Their offered improvement over all other used footers, at being able to deliver a noticeable removal of smearing and offering increased perceptions of attack, dynamics, envelope and micro dynamics is quite something. 

Your structure and your use of Maple is not as complex as a musical instrument  structure, but I feel it can impact on the SQ in a manner that makes it a worthwhile choice.

Subjective evaluation from, in use/not in use periods, might give the additional reassurance for the choice made, but I would assume you have already experienced a this when the Plywood was swapped for the Maple. 

Having a few friends over is good thing, I would not deny anybody that experience, if it good for the mind, its definitely good for the body and spirit.

Would the average enthusiast for using LP's to replay a recording, find it  necessary to use such an experience to suggest that a few subjective evaluations, where a friend or two likes the experience and musical encounter with their preferred music being replayed, is an evidence that you are an authority and guru on a set up for a LP replay.