Placement tips for Synergistic Research HTFs


I just bought 15 HTFs and will also be making about a dozen of Ozzie's homemade models.  While I will re-fresh myself with SR's placement tips, and I get that I will have to do some experimenting to tailor the HFT effect to MY listening room; are there any "Advanced HFT Placement Tips" some of you would like to share with us?  Something that might be overlooked by many of us?  Or maybe, just a good rule-of-thumb tip for someone just starting to use these?
The tips could be tips for bring out more highs, solidifying the bass response, placement hi vs low, in front of vs behind speakers, on side walls, at reflection points, behind the listener, on the ceiling above the equipment or above the listener, on the equipment.
Any ah-ha that you would like to share?  I would also be very interested in hearing from people using Magnapans.

toolbox149

Showing 11 responses by theaudiotweak

So this is all about the transmission of polarities of shear from one solid material to another..something that isolation fails to address.
Geometric shapes primarily are the most important aspect of this transfer system and then the actual shear velocity of the material or materials. Compression waves when they contact any solid surface become shear waves which become trapped within isolation forms and systems contained in and on devices..walls and chassis, speaker boxes and other components all to be remixed with the signal you wish to maintain. Motors, transformers and speakers and the vinyl LP all these generate shear waves of which,  some polarities are a necessary part of sound reproduction..one polarity is not useful but harmful to the transfer of energy and detrimental to sound integrity. Tom
So Geoff I will have to say the homeowners association for your condo probably won't permit you to build a LIGO in your play room right.? Even if you could build such a home brew device..

When you turn your hi fi on and play music you generate compression waves and they become  shear waves..after hitting any solid material. So when this does happen all your isolation is gone..Your isolation system even a  LIGO at home.. and not by any well guarded good design or plan becomes a container for all the self generated shear in your sound system and all that motors thru your home. I am certain the Real One and Only LIGO  site does not allow a 140 db arena sound system to be played in their facility. But even if it was 85 to 90db like at home you would generate shear wave interference. All audio components anything with a motor or transformer or a chassis...your speakers all generate and transmit and carry shear energy which cannot be isolated from your room or your sound system. Some audio components require shear waves to function.Yours meaning Geoff's ...isolation system can not determine the polarity of shear that does have a meaningful function of sound reproduction versus the polarity of shear that becomes interfering energy. Your isolation system works to preserve all polarities of shear the good and the bad and that is the result in your audio outcome.

I called Herzan and they said their products only deal with signals that come from below. After I asked more questions I was passed on to a nice lady.  I asked her if their devices could discern shear motions and their polarity she said no, try damping..That sucks away energy you know like isolation materials..

The application of hard materials with specific geometry to room surfaces and some contents provides the music listener with the greatest physical and emotional experience..it is all about shear and its transference. That is what is happening with these small tuning devices, those that contact hard surfaces in the room.

Tom
I had tried damping previous the result was much the same except for the reduction in amplitude at all frequencies. A minor change in geometric shape was the fix. A change of the reflective angle between the two surfaces. Tom 
Your speakers compression waves are the activators. Any thing in your room act the same way..its all in the touch. Tom
Todd,

If you filed down the tubular diameter so it was flush with the interior taper as seen in your photos that is a very good thing. From my experience the shape you have selected either by intuition or much listening has little to do with compressive waves but more about wave types that can be dispersed thu solids of a geometric form. Good form makes for better sound. Tom
I have found over the past 15 years or so that the geometry the material and its placement on surface boundaries are the 3 greatest influences of surface control.

If you have placed devices on flat surfaces or walls and you are pleased with the outcome you can take this whole thing to a higher level by removing adhesive damping materials and attaching your device right to the wall or other surface. You can do this with the aid of a threaded insert placed directly into the wall and your device also threaded screwed into the wall. You can now adjust the resonance point on the wall by ever so slightly adjusting the tension of your device to the wall or surface. 1/16 of a turn can be clearly discerned..or even much less depending on the surface.
Same method will also benefit all things internal and external to speakers and electronics. This method gives you more control over all things within your room boundary including the walls. All these devices and surfaces are passive radiators and all make their own sounds. While compressive waves are the largest wave component in any audio room the wave type and boundary area influenced by what Todd and others are reporting on and there greater benefit are not compressive. Tom

On  the devices I make that I designed to enhance mechanical grounding of a cello I have measured over a db in gain. In my audio room I place one of the same discs on top of each sound panel with the major feature facing up at the ceiling..I now use a single 3mm or 5mm magnetic sphere that fit nicely in the cup center. I use 1 each on my mono amps same way..the bass is better for sure..on the sound panels the ceiling is lifted. If you use steel bearings in the cup use nothing smaller than s110 or you damp the device. Tom
Geoff,
Do you have a measured and quoted shear velocity for any and all your Pebbles.? That is after all the basis of their relationship and conversion from compressive waves and also their response to other boundary layers they contact. Tom
I made 4 triangular venturi several years back. One each cut to fit my speakers on top. Because my speakers have no right angles or flat surface I had to seal the area between the edges of the device on its bottom surface and the top of the speaker. I used high quality black electrical tape to make the acoustic seal. I did this so the air had to run thru the venturi. The 2 much larger ones I place into the room on the floor venturi facing up. They work the best when Audio Points are used as mechanical grounds. Again I sealed the air gap between the carpeted floor and the device..this time I used wool felt bought on a role. You can tune the sonic impression of the devices by changing the finish on the surface either flat or shiny rough or smooth..the outside could be finished different than the inside. Thats all. Tom
So it cannot be isolated from emissions from within a self contained  system? Tom