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-   -   DIY a MantraSound Horn? (http://www.diyaudio.com/forums/full-range/66721-diy-mantrasound-horn.html)

ScottG 26th October 2005 03:42 AM

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.)

tade 26th October 2005 04:28 AM

Which driver did you mean on that site? These horns look very very elegant. DIY worthy indeed!

ScottG 26th October 2005 04:42 PM

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.

tade 26th October 2005 05:18 PM

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?

tvi 26th October 2005 06:29 PM

Here:
http://www.t-linespeakers.org/drivers/ribbon.html

ScottG 26th October 2005 06:50 PM

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.

tade 26th October 2005 08:55 PM

how about buy twice as many as needed, and use two of the drilled magnets per speaker.

ScottG 27th October 2005 01:24 AM

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.

tade 27th October 2005 01:26 AM

if i only had the room!

planet10 27th October 2005 08:22 AM

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

dave


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