Seismic Isolation Bars for Speakers and Sub-woofers



    • Produce a wider and deeper sound stage.
    • Enhance clarity throughout the whole frequency range.
    • Improve bass definition.
    • Eliminate structure-borne feedback between the speaker and vibration sensitive equipment.
    • Allow for neighbour friendly high level listening.
    • Eliminate irritating boom caused by coupling through the floor to adjacent rooms.

Seismic Isolation Bars are designed to break the acoustic connection between the speakers and the floor, thus preventing the passage of unwanted vibration between the two. Used in pairs under any speaker, be it floor standing, stand-mounted or sub-woofers.

Because of the very compliant nature of the Seismic Load Cells™, the speakers effectively float in the room at frequencies above 3 Hz. Each bar comprises a very strong steel cross-piece with raised ends under which are attached two Seismic Load Cells™.

When installed you experience The Seismic Effect! The sound improves dramatically, with wider stage width and greater depth and the sound becomes independent of the speakers. Bass becomes tighter and more real, with thuddy boom greatly reduced. A major plus is that the sound of the speakers is no longer transmitted through the structure of the building with the same intensity so your neighbours will probably not hear your music!

Conventional so-called rigid supports (spikes or cones) aim to hold the speaker cabinet ‘still’ at audio frequencies. However there will be coupling between the speaker and the floor and myriad resonance set up by the mass of the cabinet reacting with the unavoidable springiness of the floor, which can cause vibration of the building structure in the audio band.
Rigid coupling also transmits ground-borne vibration into the speaker cabinet and thence to the speaker driver baskets where it is superimposed onto your music.

By using Seismic Isolation Bars you will be able to enjoy your music at its natural volume level, – as if you were listening to a live performance – without annoying the neighbours!

To install, first remove any spikes or cones from your speakers and slip one bar under the front of the speaker. Then tilt the speaker forward and slide the second bar under the rear. Very small adjustments allow for setting the speakers vertical. Even though the speakers are floating, it takes a very big push to topple them.

Link to the page: " The importance of vibration isolation "

The Seismic Bars Come in two sizes:  

  • Product of the year 2016 awarded by "the ear"

    “So what do Seismic Podiums do for sound quality? If I said “everything” you wouldn’t believe me, but the answer is not far off. They dramatically increase low level resolution so you can hear more detail, they clean up the bass like you wouldn’t believe and the improve dynamics and speed.”

    Jason Kennedy

    [see full review]


    Seismic Podium, HiFi+ Accessory of the year award 2016

    Podium producdt of the year

     

     

    “The Editor and two other HiFi+ reviewers already use Podiums under their loudspeakers, and speaker companies are taking note, too. This is a real loudspeaker game changer and could spell the end of loudspeaker spikes for many listeners.”
    Full award article as well as a full product review in January’s edition downloadable here: http://www.nextnewsstand.com/products/hi-fi-plus/hifi-131/


    Seismic Waves

    What is it that distinguishes the sound of a great hi-fi system from a merely good one? Is it how loud it will go? Does it depend on the amount of bass energy it can pump into your listening room? Is it something to do with pace, rhythm and timing or what hi-fi reviewers sometimes refer to as the sound being ‘fast’? These are a few audible characteristics among many. Some can be emphasised or attenuated to alter the sound, and there any number of cable and ‘accessory’ manufacturers out there that will help you achieve such an ‘effect’, some arguably desirable, some less so. Either way, and however beneficial the changes might seem, they are most likely benign distortions, and minimising distortion, in all its forms, is a principal goal of hi-fi. Only then will a true sense of realism be won.

    So here’s the sobering fact. Every hi-fi system, from humble to high-end, has its performance ceiling set not by the cost and quality of its individual components but by how completely those components – the source, the amplification, the loudspeakers  – are isolated from the world around them. And when we say ‘world’ we mean that literally, as we’ll explain in a moment.

    Vibration.

    Without it, we wouldn’t hear a thing. Yet, as interference, it can destroy the realism – critically realised in the finest, low-level detail – of the music we love. The aim, therefore, is to preserve the good vibrations (something worth signing about as the Beach Boys would no doubt agree) by preventing contamination from the bad ones.

    This used to be thought of as a singularly circular problem. That is, it was all the fault of the loudspeaker, as it was both the means for converting electrical signals into the vibrations we perceive as music and (because it was physically coupled to the room in which it was being played), also the culprit for resonant interference – not only to the detriment of its own performance but also everything else in the playback chain.

    Nothing much has changed in this respect. If unchecked these unwelcome resonances are a fundamental cause of under-achieving sound quality, and well recognised as such – to the extent that, over the years, the burgeoning ‘isolation’ business has spawned myriad ‘solutions’ to the problem, ranging from the widely favoured spiked speaker stands and equipment racks to simple, cushioning elastomers and, more recently, exotic, expensively-encased ceramic balls with mysterious ‘energy-draining’ properties. We wouldn’t dispute that they all do something to change the sound – maybe enough, in some cases, to persuade the listener that unwanted vibrations have been vanquished and all is well with the world. It isn’t.

    Microtremors.

    Any group of components brought together with the aim of accurately reproducing music or a film soundtrack is at the mercy of our planet, and the consequences truly are seismic. Every moment of the day and night, global activity is occurring, mostly manifested as a phenomenon known as microtremors. These ground-borne seismic vibrations are always present, everywhere, all the time. They are Mother Earth’s never-ending backing track, the residual noise recorded on seismographs between earthquakes. Unless filtered out, the microtremors join in and wash away crucial fine detail.

    So how come we can’t feel them? Their amplitude is very low, measuring between force -1 and force 2 on The Richter Scale, as shown (fig. 1) from the US Geological Survey. No, you can’t feel them and the only way you can see them is as a graphic trace. But you can hear their degrading influence. The presence of low-level seismic activity 24/7 is responsible for undermining your hi-fi’s potential to give true musical satisfaction and ultimately compromises your financial investment in whatever hardware you own or choose to own.

    The solution.

    Townshend Audio is the world’s only manufacturer of isolation systems that protect hi-fi and AV equipment from seismic microtremors. The first line of defence is the Seismic Podium. Designed as a range to accommodate any size and weight of speaker – standmount plus stand, floorstander or subwoofer – the Seismic Podium breaks the acoustic connection between the floor and the speaker, preventing the passage of deleterious vibrations both to and from the speaker cabinets. For a detailed explanation of why this is an absolute necessity before any speaker can perform to its true potential, read ‘Earthquakes on hi-fi’, http://goo.gl/sv3GsX.

    Floated on Seismic Isolation Podiums, speakers are freed from the ever-present seismic activity and room/floor interactions that seriously degrade sound quality. The result is simply magical, allowing listeners to hear into their favourite music in a way they were never able to previously. When under your speakers, they will give you immediate improvements in overall sound by preventing speaker generated vibration from entering the floor and sound from entering your speakers. By eliminating the resonance between the speaker-cabinet mass and the floor, the sound will be noticeably clearer, much more tuneful, controlled and natural.  Bass boom is significantly reduced and there will be a far larger, much deeper and wider sound stage. The sound becomes natural and more enjoyable.

    As many have already witnessed, the improvements are a revelation and a true pleasure – not least because severing the acoustic link between the speaker and the floor allows playback at more realistic volume levels without annoying the neighbours!

     


    Seismic Speaker Isolation Tap Test

    In this promotional video filmed at the National Audio Show in UK, Mike Valentine from Chasing the Dragon and Rolf Ward from Henley Designs, Wax lyrical about their experiences using the Townshend Seismic Podiums under their speakers.

     


    Naim system upgrade

    Townshend-seismic-isolation-under-Naim system including Ovator S-600s speakers

    When creating our perfect audio scenario, attention will inevitable be drawn toward isolating the components from ground-borne vibration, thus insuring optimal musical enjoyment and less for the neighbours.

    Gerry has effectively Isolated his full Naim system including Ovator S-600s speakers by breaking the link between the floor and the equipment, freeing it from its inevitable resonance.

    These problems are normally associated with ground vibration travelling through older houses where wooden sprung floors need to be decoupled from the equipment. But what about newer builds? Concrete is seemingly rigid and can be a surprisingly perfect conduit for ground borne vibration, playing havoc and coursing super sensitive circuitry to jitter and the walls to shake.
    Gerry’s now fully floated Naim system Townshend Seismic Isolation has shown truly remarkable and cost effective results even on concrete!

    “I have finally got everything installed… obvious benefit in sound quality, virtually eliminating the bass boom I suffered in the past.”
    The pair of racks, weighting respectively 142Kg and 132Kg, have been isolated by removing the original feet and placing instead four load appropriate Seismic Isolation Bars front to back directly under the granite shelf.
    “I am astonished by the improvement in the sound quality of my system following the use of the Isolation Bars, the best upgrade I have experienced.”
    Link below to read Gerry experience on the Naim forum.

    http://forums.naimaudio.com/topic/speaker-isolation-ovator-s-600-s


  • The singular Seismic Load Cell is available with six different weight capacities, ranging progressively from 1kg up to 32kg. Virtually any weight of equipment can be isolated.

    The spring rates are as follows:

    Spring Min weight Max weight Colour Code
    AA 1kg (2lb) 2kg (4lb) Red
    A 2kg (4lb) 4kg (9lb) Orange
    B 4kg (9lb) 8kg (17lB) Yellow
    C 8kg (17lb) 16kg (35lb) Green
    D 16kg (35lb) 32kg (70lb) Blue
    E 32kg (70lb) 64kg (140lb) Silver
    The maximum load when using four E springs is 256kg (560lb). For loads above this, eight or more load cells may be required.