Placement tips for Synergistic Research HTFs

Todd, this one’s for you. Hope this helps clear things up.

First, everything you never wanted to know about resonators:

https://en.m.wikipedia.org/wiki/Resonator

Next, you can now calculate your own acoustic wavelengths using this handy calculator:

http://www.mcsquared.com/wavelength.htm

You will need a different calculator to determine electromagnetic wave lengths, obviously.

Voila!

http://www.sengpielaudio.com/calculator-radiofrequency.htm


Cheers,

Geoff Kait
Machina Dynamica
Advanced Audio Concepts

Todd;
I left a message here yesterday but somehow it never was posted, so here goes again.   I also just got my jkbtn brass bowls and 3/8" copper caps.  I assembled two varieties.  One set, like yours, was pushed together by force.  For the second set I used heavier brass caps as my cone base and superglued them together so the cone sticks out further from the base.
After working around a blown fuse situation I'm finally to the point of testing and comparing my various models. I've also tried various room placements.
I'm going to be very interested in your results since your speakers are different than my Maggie's.  I'm formulating a placement theory but I wonder if my theory might work with Maggie's but not with regular speakers.
Maybe you could try a test for me.
Without any resonators attached, listen to a couple of songs from your favorite evaluation music.  I would like you to listen for the soundstage location and where the vocalist is located?  Also please focus on the upper midrange frequencies and the treble frequencies.
Then add two resonators to the front wall just outside of your cabinet about 3' off the floor & listen again.  Then add a resonator to the front of your speakers and re-evaluate.  Finally, add two more resonators, higher up on the front wall and re-evaluate.
Do you hear any differences?  I'm wondering if your soundstage shifts like mine does.  I also would like to hear what this does, if anything, to your upper midrange and treble.
After that, if you haven't tired of this already, take all the resonators off and try a resonator on the inner side of both your speakers.  Then take those off and attach a resonator to the outer side of your speakers.   Does the soundstage shift?  Do the instraments shift?
I don't want to skew your results by telling you my results right now.  Not to mention, if your results are different than mine, then maybe my results are only good for planer speakers.

Thanks,
Toolbox

Toolbox - will do, though I won't be able to evaluate the sound with the resonators on the wall behind my speakers because of the layout of my room.. there's a doorway directly to the right of my right speaker. I could try a resonator on the door, but the lack of symmetry could very well negate this placement.

I won't have time until tonight or tomorrow. Fun experiment though, I'll happily report back!

@geoffkait thanks! I'll play around with those.

Thanks Todd,
I meant to have you mount them just outside you component cabinet but still between your speakers and inside your wall traps as well.   Looking foreward to your results.

If anyone else what's to join in on the evaluation fun, please do.  Then post a little report.  

I've already finished most of my evaluating on my main setup, and I'm going to try some of this on a second stereo I have.  Unfortunately, my second stereo is placed to be "out-of-the-way" more than it's placed to sound good.

Toolbox