1. Things you need to know about the new ‘Conversations’ PM system:

    a) DO NOT REPLY TO THE NOTIFICATION EMAIL! I get them, not the intended recipient. I get a lot of them and I do not want them! It is just a notification, log into the site and reply from there.

    b) To delete old conversations use the ‘Leave conversation’ option. This is just delete by another name.
    Dismiss Notice

Stack Audio Speaker Isolators

Discussion in 'audio' started by AndyU, Jan 25, 2023.

  1. AndyU

    AndyU pfm Member

    Stack Audio have recently announced their AUVA speaker isolators, which claim to absorb vibration. They don’t use compliant decoupling like sorbothane, but rather cells of tungsten particles which are said to absorb vibration. £700 or £1000 for a set of 8.
    Sanj250 likes this.
  2. Alun Rains

    Alun Rains Jus Juan Cornetto

    Saw those, certainly look interesting. According to their website they are priced at £840 and £1240 for a set of 8.
    Initially I thought they were extremely expensive but when compared to the higher end IsoAcoustics models such as the Gaia Titan range they seem very competitive to be fair…
    AndyU likes this.
  3. Purité Audio

    Purité Audio Trade: Purite Audio

    But if the particles are contained in a ‘ a totally rigid, machined-from-solid, aluminium case’ which is connected to the speakers and the spikes…
    NeilK likes this.
  4. per-Sony-fied

    per-Sony-fied Me in another jacket

    There's inflation for you :eek:

    My initial impression when I heard the price was thanks but no thanks, stick to my concrete floor :D
  5. Woodface

    Woodface pfm Member

    Sooner or later all audio companies see the quick buck to be gleaned from loyal customers. It’s usually bits of wire but ‘vibration absorbers’ will work just as well.
  6. John H

    John H pfm Member

    Just when you thought you'd seen it all . . . .
  7. Alun Rains

    Alun Rains Jus Juan Cornetto

    Upon reading the specification further it would appear that the tungsten particles are housed in separate pods within the overall aluminium structure. The pods are connected to the speakers and then to the floor spikes. The tungsten particles absorb the vibration in a similar way to throwing a ball into a pile of sand, it just completely absorbs the shock. Quite clever it seems.
    Hope that my understanding is correct.
  8. boon

    boon pfm Member

    Ok so that sounds like it works on a similar principle as D3O armour, you hit the ground after coming off your bike at speed and the armour absorbs the shock instead of your bones.
    Think I will take the armour out of my leathers whilst it’s frosty outside and put it under my speakers. Something to do on these winter nights ;)
  9. biquer

    biquer Active Member

    Lots of claims from lots of people.
    I remain skeptical.
    SteveH and John H like this.
  10. Alun Rains

    Alun Rains Jus Juan Cornetto

    Why not indeed..
  11. RoA

    RoA pfm Member

    Not sure what this does what a carpet with rubber 'multi cell' underlay can't do ...
  12. Purité Audio

    Purité Audio Trade: Purite Audio

    For these to isolate the unit would have to have an inner ‘piston’ that does not contact the outer case, I don’t see that looking at the photographs of the product.
    Even if the separation exists then the weight of the speaker would be on the particles, if they compress then that is direct coupling.
    Even worst case, poorly designed loudspeaker on a hugely resonant floor, even really effective isolation ( rolling air diaphragm) only operates on the structurally transmitted vibration you still have to contend with the airborne transmission.
    SteveH and John H like this.
  13. JezmondTutu

    JezmondTutu pfm Member

  14. AndyU

    AndyU pfm Member

    Northward Audio make speaker stands based on the Sylomer/Neoprene constrained damping system they use for soffit mounted ATCs in their studio designs, but none as yet for floorstanders. They also have a model for Kii Threes. If you hunt around gearspace you will find some of the maths and engineering calculations that go into their design.
    JezmondTutu likes this.
  15. kernow

    kernow pfm Member

    Probably do more than a cable of the same price tbh. But then moving your speakers a bit is free
  16. Alun Rains

    Alun Rains Jus Juan Cornetto

    I think we all need to wait for several honest reviews of these actually being tested before jumping to any conclusions, to be fair. They are after all brand new to market right now.
  17. Mr Pig

    Mr Pig Trade: ^'- -'^

    I saw these the other day, no idea they were so expensive! Wonder if they... work.
    Alun Rains likes this.
  18. John

    John Rack’em Up!

    From the Stack website:

    “The Stack Audio AUVAs bring your music to life. The AUVAs are designed to do two things: hold loudspeakers rigidly whilst simultaneously absorbing vibration. They combine the best qualities of both spikes and isolators - without the drawbacks of either. Designed to be used on either hard floors or carpets, with the AUVAs direct sound waves are more precisely focused and cabinet vibrations are dissipated before reaching the floor.”

    Nice to see another company addressing an issue I haven’t seen any other company beside Symposium Acoustics who have been banging on about this for years.
    Alun Rains likes this.
  19. paulfromcamden

    paulfromcamden Baffled

    When I clicked on the link a little box popped up saying 'Need Help?'

    Quite : )
    Woodface and John H like this.
  20. stevec67

    stevec67 pfm Member

    Well, it'll relieve you of £1200 for a start. Which would of course pay for a whole new carpet.
    Darren L and RoA like this.

Share This Page


  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice