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Old 25th August 2006, 04:17 AM   #1
frugal-phile(tm)
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Steve,

The Metronomes are also quite interesting.... and not really a TQWT (in a strict sense). I can't remember whether we discussed it here or on the full-range forum. Because it tapers in both directions the taper is not linear, but quadratic. It does make for a very elegant looking speaker.... have you posted drawings anywhere?

dave

PS: always nice to see the "Made on a Mac"
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Old 25th August 2006, 03:30 PM   #2
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Quote:
Originally posted by planet10
Steve,

The Metronomes are also quite interesting.... and not really a TQWT (in a strict sense). I can't remember whether we discussed it here or on the full-range forum. Because it tapers in both directions the taper is not linear, but quadratic. It does make for a very elegant looking speaker.... have you posted drawings anywhere?

dave

PS: always nice to see the "Made on a Mac"
Dave

The plans for the speaker can be downloaded from here

Steve.
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Old 26th August 2006, 08:32 PM   #3
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Here is a graph of the actual taper of the metronoe.

dave
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File Type: gif metronome-curves.gif (24.0 KB, 12469 views)
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Old 26th August 2006, 09:43 PM   #4
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Dave

Hmm

There's a slight curve on the taper

Does this mean it has an element of horn behaviour involved with it ?

Steve.
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Old 26th August 2006, 10:46 PM   #5
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Quote:
Originally posted by Steve Cresswell
There's a slight curve on the taper... Does this mean it has an element of horn behaviour involved with it ?
A Voigt can already be thot of as a form of conical horn. Here the taper is quadratic, as opposed to linear.

Normally a classic receipe Voigt has little chance of being close to optimal, but you have added a twist -- this has been discussed, but yours is the 1st i've seen actually built.

http://www.diyaudio.com/forums/showt...253#post569253

I've sent the data off to Scottmoose to see if he would be so kind as to model it for us.

dave
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Old 26th August 2006, 10:52 PM   #6
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This thread was split off from http://www.diyaudio.com/forums/showt...597#post989597

It is about Steve's Metronome speaker

http://web.mac.com/scress1958/iWeb/S...20Speaker.html

(BTW Steve using spaces in URL name's is not recommended)

Click the image to open in full size.

dave
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Old 26th August 2006, 11:23 PM   #7
ronc is offline ronc  United States
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May i offer a few suggestions? I did a great deal of study on this action and even built some based on near the same principal several years ago.
ron
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Old 27th August 2006, 12:37 AM   #8
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May i offer a few suggestions? I did a great deal of study on this action and even built some based on near the same principal several years ago.
Please Ron... your experiences are always of great value.

dave
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Old 27th August 2006, 02:24 AM   #9
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Here is a model of the speaker to better give an idea of the shape.

dave
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File Type: gif metronome-render.gif (7.7 KB, 7842 views)
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Old 27th August 2006, 03:20 AM   #10
hugz is offline hugz  Australia
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I have some scrap wood around but no design skills. It there an easy way to change this design to suit 8 inch drivers?
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