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Old 27th July 2005, 07:05 PM   #21
DorinD is offline DorinD  Romania
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Default Phase plug

Thanks a lot MwmKravchenko and GM!
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Old 28th July 2005, 08:01 AM   #22
e-side is offline e-side  Netherlands
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Hi GM,

sorry i didn't respond to your question. The problem is that I'm still finding out what brand and type this driver is, since i bought this driver at the local audio-shop. The only info i have comes from a sticker on the magnet:

"Vision Acoustique
Ref: 40170DB
101352L 29001"

I already posted on this forum to ask if anybody knows this driver: Does someone know this speaker?

It seems that this driver is an OEM-unit from Audax.
I think this driver is used in Vision Acoustique's modell 'Eden II'.

For pictures you could visit the thread above or the audax site (Thiele & Small Parameters are different):

http://www.audax.fr/prestige/hm170g8.html

I measured the Thiele & Small Parameters myself. Because it's a dual voice coil driver i didn't know how to wire when measuring, but on this forum they told me to measure the way i'm going to use the driver, so these are the TSP when wired in series:

Re = 10,4 Ohms
Fs = 37,43 Hz
Qts = 0,19552
Qes = 0,20079
Qms = 7,44531
Vas = 26,769 L
Sd ~ 216,4 cm2 (6.5" driver)

I hope I answered your question now, maybe you know what brand/type this driver is??

best regards
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Old 28th July 2005, 07:08 PM   #23
e-side is offline e-side  Netherlands
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And these are the TSP for the voice coils wired in parallel

Re = 3,5 Ohms
Fs = 37,43 Hz
Qts = 0,26788
Qes = 0,27747
Qms = 7,74946
Vas = 26,796 L
Sd ~ 216,4 cm2

best regards

e-side
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Old 29th July 2005, 01:54 AM   #24
mike.e is offline mike.e  New Zealand
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Paul : Because at subsonic frequencies the cone is safely loaded by the rear chamber. Also note that the driver is only loaded on one side with a BLH,so assymmetrical distortion occurs,2HD.

The effect of the capacitive rear chamber on the horn causes the peak in excursion through whatever means while the BLH doesnt. Note that high BL drivers suffer less problem here(AV12 )So the apparent increase in F3 over a BLH isnt actually usable,and is below the horn cutoff itself.

http://www.volvotreter.de/dl-section.htm
The Dinstale Horn Loudspeaker Design Articles

http://www.geocities.com/xobt/index2.html
Subwoofer shoot out(labhorn measurements)

http://srforums.prosoundweb.com/inde...g/6891/56805/0
Labhorn excursion measurement(laser)
Amazing how close hornresp predicts to reality.

Something like
Cornerloaded
S1 : 100cm^2
Sm : 2500cm^2
Expo 255cm
Vrc 33litre

If you used Two drivers,you could reach lower or use less path length to acheive the same ~45hz cutoff
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Old 29th July 2005, 02:01 AM   #25
mike.e is offline mike.e  New Zealand
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Quote:
Originally posted by GM
Greets!

You're welcome! I'm aware of the program (he lives fairly close to me and I helped him some with learning horn design also), but I've never installed the program since it requires also installing Microsoft .NET.

Anyway, I don't understand your Q. What is 80.2 Hz, the driver's Fs? Or is it just a sample design? Or.....?

GM
GM you should try it,Its a large but easy download from microsoft.com I feel like ive spent a few years using it,staring at the SPL graph,wondering whats viable while considering practical size limitations -Ive still only made one!But designed a few which people have used elsewhere.

Mike.e
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Old 29th July 2005, 12:34 PM   #26
Mark Kravchenko --- www.kravchenko-audio.com
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Default What Gives????

Mark
Quote:
Apparently not since you didn't feel the need to 'pay' me what little I asked for in the way of a 'fee':

We all give our opinions and advice freely here. Some of us including myself run consultancies. But I have never asked anyone for payment. And many times I have devoted much research and many hours to some of the answers.

If I'm wrong about this I apologise.

But if I'm correct in the assumption I think the moderators should step in.
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Old 30th July 2005, 09:06 PM   #27
GM is offline GM  United States
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Quote:
Originally posted by e-side
Hi GM,

I hope I answered your question now, maybe you know what brand/type this driver is??

best regards
Greets!

Yes, thanks. Don't have a clue, I only asked in case someone else should have a need for the info.

GM
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Old 30th July 2005, 09:18 PM   #28
GM is offline GM  United States
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Quote:
Originally posted by mike.e

GM you should try it,Its a large but easy download from microsoft.com......

Mike.e
Greets!

Maybe one of these days if I ever get a faster connection and more stable OS than the current Windoze.......

GM
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Old 30th July 2005, 09:31 PM   #29
simon5 is offline simon5  Canada
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Hey mwmkravchenko, the only payment he want is to know what driver e-side is using in the design. Don't worry about GM, he's a nice guy!

Quote:
For my records, what make/model driver is this? Rest of the specs (measured?) or website?
Quote:
Thank u very much GM !
Quote:
quote:
Originally posted by e-side
Thank u very much GM !

Apparently not since you didn't feel the need to 'pay' me what little I asked for in the way of a 'fee':
quote:
For my records, what make/model driver is this? Rest of the specs (measured?) or website?

GM
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Old 30th July 2005, 10:09 PM   #30
Mark Kravchenko --- www.kravchenko-audio.com
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Default Then GM has my full apology

To Mr. GM " I'm sorry"

I've watched a few threads get a little on the hook and lure side of things and I personally hate it.

If we post in this forum it is free advice.

Many people take their posts seriously. And if I have read enough of GM's posts he to knows what he is talking about!

Mark
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