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Old 5th June 2002, 10:20 PM   #1
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Question Morel MW166 transmision line

I am prepared to build a two-way floorstander speaker with Morel MW166 and Focal Td 120 tweeter. Have anybody maybe built Morel MW166 driver in transmision line speaker?

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Old 6th June 2002, 10:52 PM   #2
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No I haven't, but i just looked at the specs and it seems like you are not shooting for bass as much as voicing so as basically the same thing the Voight pipe will do what you want and be much easier to build. This uses quarter wave just like a TL and I would guess 40Hz is the lowest you can get from the Morels. Speep off sound is 343 meter/second at room temperature in air. Divided by 40 hz= 8.565 meters X 3.2849= feet 28.16 divided by 4=7.04 ' That is a tuned quarter wave to 40Hz so a bent 1/4 wave Voight would be around 3.5' tall.
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Old 7th June 2002, 05:42 AM   #3
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The Qt of the MW166 is a bit high at 0.51 for a T/L ,though you might get away with it in a 1/4 wave as ThatchEar suggested. If you have already bought the drivers that's all you can do, if you haven't, you could consider the MW168 which has a Qt of 0.41 which is closer to the ideal and has a much more benign response, lacking the peak at 5kHz which will make designing a x/over difficult.

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Old 7th June 2002, 07:04 AM   #4
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Download Martin King's software and you can play with all sorts of lines, from heavily tapered thru straight, thru TQWTs.

The 0.51 Qts may seem to be high, but i just keep remembering a line of Augspurger's when i heard him 1st present his TL paper, "...or you could just get a higher Q driver". It may just mean a slightly larger cabinet.

Go play -- i bet it makes a good quarter-wave speaker.

dave
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Old 7th June 2002, 08:05 AM   #5
argo is offline argo  Estonia
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Quote:
Originally posted by planet10
Download Martin King's software and you can play with all sorts of lines, from heavily tapered thru straight, thru TQWTs.
...and donít forget to buy MathCad software package in order to run Martin Kings' software.

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Old 7th June 2002, 08:13 AM   #6
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Quote:
Originally posted by argo
...and donít forget to buy MathCad software package in order to run Martin Kings' software
There is also a link to the free MathCad Explorer 8 and versions of the worksheet to use with it. It doesn't save or print so you need to do screen snaps...

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Old 7th June 2002, 08:28 AM   #7
argo is offline argo  Estonia
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Quote:
Originally posted by planet10


There is also a link to the free MathCad Explorer 8 and versions of the worksheet to use with it. It doesn't save or print so you need to do screen snaps...

dave
...yeah. Just wanted to remind that this is not a simple plug and play soft. It also has a bit steep learning curve. But many students use it every day for their homework and if your college has the software - way to go. It should be most advanced and accurate modeling code around for that purpose.

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Old 8th June 2002, 12:17 AM   #8
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There is a transmissionline with the Morel MW 166 in a German magazine called Klang und Ton, the design is called the Morelline.
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Old 9th June 2002, 12:14 AM   #9
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Jos, what they said in Klang and Ton magazine about this speaker?

Supernet
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