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Old 26th October 2005, 03:42 AM   #1
ScottG is offline ScottG  United States
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Default DIY a MantraSound Horn?

I realize that the Dulcet Horn or even their linesource version are not fullrange drivers however neither is a Manger or most drivers under a 5 inch diameter.. and given the crossoverlessness of the horn/driver combo and the high eff... well you get the idea.

So then why do I bring this up now, specifically as a DIY effort?

The circular planars used for those horns look a L O T like the cheap planar capsuls from the east that have a fairly continuous highpass "slope" - seemingly perfect for a backhorn.

Specifically, they look a lot like the previously discontinued drivers from Apex Jr...

Note that I said "previously" - their back!

And at 5 bucks a pop playing with the idea of a backhorn for these cheapies may actually lead to sonic euforia (and/or build frustration and hell).

Well its just a thought..

The horn with the line source pic:

http://www.audio-consulting.ch/Dulcet.htm

The drivers:

http://www.apexjr.com/new.htm

Alas, I could not find the driver's measurement and spec.s on Planet 10's site.

(and no, I don't think they are the same drivers, I think MantraSounds drivers are slightly larger and they obviously have more holes in the magnets.)
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Old 26th October 2005, 04:28 AM   #2
tade is offline tade  United States
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Which driver did you mean on that site? These horns look very very elegant. DIY worthy indeed!
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Old 26th October 2005, 04:42 PM   #3
ScottG is offline ScottG  United States
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Quote:
Originally posted by tade
Which driver did you mean on that site? These horns look very very elegant. DIY worthy indeed!
The ones on the link I provided that start with:

"ribbon tweeters are back.."

Here is the link picture of the driver:

http://www.apexjr.com/images/Ribbon2.jpg

It could very well be that MantraSound's owner/designer started with these on a DIY basis and then started making his own with some higher quality magnets and then started drilling holes.

If I were attempting this (as if I had the time) then I would likely purchase the drivers and then start modeling with HornResponse as if the backhorn was a normal front horn.
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Old 26th October 2005, 05:18 PM   #4
tade is offline tade  United States
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yes, i like those drivers, and 400hz, sounds doable. If i had any more space than my desktop to devote to speakers i would do it too! : )

can you remove the back of those drivers to give the rear wave access to the horn?
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Old 26th October 2005, 06:29 PM   #5
tvi is offline tvi  Australia
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Here:
http://www.t-linespeakers.org/drivers/ribbon.html
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Old 26th October 2005, 06:50 PM   #6
ScottG is offline ScottG  United States
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Quote:
Originally posted by tvi
Here:
http://www.t-linespeakers.org/drivers/ribbon.html
Thanks tvi

The measurements will not of course take into consideration the modification needed for dipole operation - which should extend the response considerably. In this case the natural modification will be to simply find a drill bit that matches the diameter of the holes in the front magnet. Of course you will need to take apart the entire capsul before drilling.
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Old 26th October 2005, 08:55 PM   #7
tade is offline tade  United States
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how about buy twice as many as needed, and use two of the drilled magnets per speaker.
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Old 27th October 2005, 01:24 AM   #8
ScottG is offline ScottG  United States
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Quote:
Originally posted by tade
how about buy twice as many as needed, and use two of the drilled magnets per speaker.
yup, I had also thought of that soon after I posted. I'm not sure though it will work perfectly, but you would think that it would.
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Old 27th October 2005, 01:26 AM   #9
tade is offline tade  United States
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if i only had the room!
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Old 27th October 2005, 08:22 AM   #10
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Default Re: DIY a MantraSound Horn?

Quote:
Originally posted by ScottG
Alas, I could not find the driver's measurement and spec.s on Planet 10's site.
http://www.t-linespeakers.org/drivers/ribbon.html

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