Stack Audio Auva Isolator

Let’s start from the top.

You see an adjustable thread.

Adjustment is good but threads exposed increases the time energy flows..not in a straight or uncorrupted line.

Exposed threads generate shear wave energy. Waves that travel in 2 directions. That means the energy from one thread to the other is reflected back and forth. This creates even more interference.

Below the threads are 2 locking nuts. Those have rights angles on their exterior and also generate shear.

If the nuts and the threaded stud are made of dissimilar materials those 2 at their boundary intersection also generates interfering energy.

Is the threaded stud the nuts, as well as the material of the outer diameter of the device made of the same material? Different materials different speeds.

The top and the bottom of the device are flat.

The flat top has no direct coupling to the device it is supporting.

Any energy that arrives at the top flat will be reflected back up at the device at rest. It will be reflected upward at the resting device thru the 2 nuts also with sharp edges and the corruption of the threaded stud.device..All that corrupted energy is now at the bottom of the component.

At the bottom you have another flat surface with 3 sharp points made of another material and speed.

These points have only 1 primary angle which means the floor bounce of energy will be reflected back up into the flat bottom of the large bottom of the disc.

I can’t see the inside but I know how bad or good tungsten can sound. Either by diameter, shape or added alloys. As a pure element tungsten unaided without an additional element makes for a musical image that is in your face as it climbs the wall and rests at the ceiling boundary intersection. Totally unreal and nearly painful.

Devices like the one reviewed mostly share all the above descriptions..

I have spent countless hours and thousands of dollars on my use of tungsten in one of my devices. I arrived at the very smallest cylinder tempered with the addition of another element cut and polished by diamond. That’s all I will share.

Thank you for your question.

TomD

I would like to know how the Stack AUVA EQ compares to Stillpoints SS Ultra.

@wcheng2 has reported its not as good as the Critical Mass, but they are very expensive. The AUVA is bargain priced compared to other isolation footers. The SmoothLAN is as well, so it must be the philosophy of Stack Audio to provide great value.

I have one set of the Stillpoints SS Ultra and its frankly amazing on any component, even the power distributor, or the Nordost grounding box. I wish I had 5x more sets, but if the AUVA EQ is close it would be great as its 1/6th the price of a set of Stillpoints.

agisthos,

I started out with the Stillpoints Ultra SS, then went to the Critical Mass Footers. Big improvement.

I do have a set of the Stack Audio Auva under my Lumin X1, and compared it to the Critical Mass Footers and honestly, they were very close in sound quality. The edge goes to the CM footers.

ozzy

@theaudiotweak "Below the threads are 2 locking nuts. Those have rights angles on their exterior"

How do round nuts have right angles?

Regardless of that comment or any of the rest of your response have you actually tried the Stack Audio Auva to provide 1st hand comments vs your theory? I have them and they live up to the manufacturer's statements

Facten,

The nuts are threaded to a shaft that is attached to the device which is flat and creates the right angle where they intersect. This flat device acts as a backboard for interfering energy to travel back and for between the device and the component which pollutes the component.

Thanks for having me look at this device again as I see another source for interfering energy (Shear) to develop and that is the coarse knurling on the surface of the 2 nuts attached to the interference created by the threads of the shaft. More shear>>>

You could go to an online store such as McMaster Carr or even a local hardware store and find brass washers and nuts and a brass threaded shaft as superior substitutes for some of these knarly parts and hear a difference for yourself. Of course, the shaft may not be removable.  Or design your own as I pretty much told you what not to do and make a better one. I do have cryod micro bearing steel of various ODs that are superior in sound to that of tungsten because they have a lower shear wave velocity. I have tried many different materials in many different ODs or powders. Powders over damp the sound so the hard choice is to select from many sizes of bearings and their material makeup.

TomD