Synergistic Research HFT + FEQ

Ozzy - I own 10 HFTs and a FEQ. They are crazy good so your DIY version being even better really intrigues me. I understand you use 1/8" copper caps. I found the Hareline cones on Amazon. You said to use the "large" cones. The "large" cones are 1/4" according to Amazon. Is that the correct ones to use? The other options are medium at 7/32", small at 3/16" and x-small at 5/32". Yours appear to fit so well I just want to make sure I order the right cones to fit the 1/8" caps. Thanks again Ozzy!

FYI - Ozzy confirmed via PM that it is the 1/4" large cones he used with the 1/8" caps.

FYI - pay attention to ozzy! I thought he made a typo so bought some 1/4 inch caps and they are way too large for the cones. Go figure. Turns out the 1/4 inch caps spec out at around 3/8 in.

Hi all,

I know that this is a (very) old thread, but I have been experimenting with DIY HFT clones built exactly to ozzy’s directions (I think) and am having unexpected negative results. I started with 5 of them in the SR Stage 1 config, added 5 more according to the SR Stage 2 config. They are very powerful in their effect. The highs became excrutiating in both configs. I move them around on the wall, mostly moving them progressively downward toward the floor, and noticed a change in tonality with each movement, but the high-frequency ringing was still killing my ears.

I then tried them on my room’s rear wall (only) and am liking the effect, moving the soundstage forward and adding perceived space between and behind performers. I had exactly the same experience with my Shakti Hallographs. Didn’t work well in the same room’s front corners (behind speakers), but work very nicely in the rear corners (behind my listening position).

I have the supplies to build 20 more and am hoping for some advice from those that are using them successfully around their room.

Best to you,
Dave

Dave;
Did you ever have success with Ozzy's HFTs?  I am thinking about buying supplies to try these, but your post raised some red flags.  Not having seen any of the actual parts I wonder if there are better way to put here together - is there a "best glue" to use?  Is there a preferred glue technique?   Do you have a close-up photo of one of yours?  Maybe if Ozzy sees this post he can provide a close-up photo. (I can't find them in his photos of his setup).