What to build with a pair of FR4.5 Hemp Acoustic drivers

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #20 on: 16 Apr 2012, 06:56 pm »
Easily is not a word i would use. In the case of measuring many things (electronics, speakers, rooms), including what EnABL does, requires the ability to detail what is happening on the order of 40 dB down in the presence of the 0 dB signal. When talking about measuring a speaker, this means a very quiet environment.

One of the problems we have in the amateur speaker builders is that the plethora of crude measurement tech that has become readily available is not recognized as such, and that once given the tool all problems are treated as if that tool will deal with it (ie if your tool is a hammer, then everything looks like a nail)

dave

One would think since you live in Canada eh, you'd be familiar with the work, research of Floyd Toole at the National Research Council of Canada.

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #21 on: 16 Apr 2012, 07:19 pm »
if your tool is a hammer, then everything looks like a nail

Why don't you try some EnABL on a nail and tell me if it sounds better when you hammer on it.

planet10

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #22 on: 16 Apr 2012, 07:30 pm »
One would think since you live in Canada eh, you'd be familiar with the work, research of Floyd Toole at the National Research Council of Canada.

I am -- he autographed my copy of his book. He has done some very valuable work that gives some very useful broad outlines for design & implementation.

dave

ejfud

Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #23 on: 16 Apr 2012, 09:20 pm »
Drivers arrived safe and sound. Beefy little things.

doucanoe

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #24 on: 17 Apr 2012, 12:11 am »
It is more about the pattern. The material used has to leave a bump (doesn't need to be big). On cones the material of choice is a high pigment flat arcylic paint (pollyscale train paint is the starting point). People playing with baffles & rooms will often use pieces of sticky tape.

The big discussions are on diyAudio. Besides offshoots, the big technical thread where speculation on how it can work, quickly shouted down by those who say it can't possibly work, and another thread where technics, patterns and impressions can be had. And those who mostly just sit back and enjoy what EnABL brings to their enjoyment of the music.

dave

Thanks for the info., Dave.  I'm not one to pass judgement on something until I have some personal experience with it. Gary has (I believe) similar Jordan drivers with one being treated and the other not. I have heard them both but not together so any comparisons could be made.  Sounds like that is going to have to happen one of these days.

RC

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #25 on: 17 Apr 2012, 06:43 am »
he discovered that another ring was needed for best performance

Here is a reprint from audioXpress magazine June 2005 that you might enjoy. Scroll down and take a look at the pictures and graphs.

http://www.speakerdesign.net/audioXpress/diffraction/diffraction.pdf



chrisby

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #26 on: 17 Apr 2012, 05:09 pm »
Drivers arrived safe and sound. Beefy little things.

have you decided on enclosure design yet?

BVR such as Brynn, or MLTL would deliver the maximum weight/extension in the lower frequencies, while a "Fonken" style will have less of it, but with  more finesse/control, and excellent imaging/depth due to reduced enclosure diffraction signature



ejfud

Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #27 on: 17 Apr 2012, 07:26 pm »
I think I'll try them in my 127 Fonken's and see what I get, but my end result will more than likely be a pair of Brynn's.

doucanoe

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Re: What to build with a pair of FR4.5 Hemp Acoustic drivers
« Reply #28 on: 18 Apr 2012, 01:14 pm »
Here is a reprint from audioXpress magazine June 2005 that you might enjoy. Scroll down and take a look at the pictures and graphs.

http://www.speakerdesign.net/audioXpress/diffraction/diffraction.pdf


Thanks, That I'm more familiar with than the measured or audible effects of EnABL treatment. 

RC