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

@o_holter I recently installed a set of HFT's on my Magnepan 20.7s and I also have a set of 12 UEF panels that I borrowed from a friend.  Since it is essentially impossible to do an effective before and after test I am completely open to the argument that what I think I am hearing is just a psycho-acoustic delusion.  And the fact that I can't think of any real mechanism for those things to make a difference makes that even more likely.

Having said that, the biggest confirmation that these devices do something is that the sound seems to change when you move them around.  I have adjusted the positioning from what Synergistic suggests and noticed changes, some for the worse and some for the better.  It is still possible what I think I am hearing is just a delusion but the fact that I think I hear differences rather than no change is an argument for them doing something.

In my system I would say the biggest differences I think I hear are an improvement in the attack and transients in terms of sound.  Things that are supposed to be crisp and sharp are more so.  Secondly, I have noticed more specificity and depth in the soundstage.  Overall, I feel they have made a real improvement and in a way that would be difficult to achieve otherwise.  And if that isn't so, well I believe it is so and therefore my enjoyment of my system has improved LOL.

I haven't tried the "thick crystal necklace".  Maybe it would have the same effect but I suspect not.  

I can clearly conform o_holter´s observations copied below:

"In my system I would say the biggest differences I think I hear are an improvement in the attack and transients in terms of sound.  Things that are supposed to be crisp and sharp are more so.  Secondly, I have noticed more specificity and depth in the soundstage.  Overall, I feel they have made a real improvement and in a way that would be difficult to achieve otherwise.  And if that isn't so, well I believe it is so and therefore my enjoyment of my system has improved LOL."

I have experienced the same changes/improvements. I would like to add the effect "a wider soundstage" to the above.

That having said, I am still in the process of moving the transducers placed on the side walls to achieve the best possible result in my room.

At any interest I am willing to report on my experience at the end of my process.