"straight" frugel horn mk3 - diyAudio
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Old 12th April 2011, 07:01 PM   #1
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Default "straight" frugel horn mk3

I really do like the look of the 0v8 frugel horn mk3, but I guess it is not so easy to build if you don't have your own cutting tools = there are angles EVERYWHERE...
For my part, I am used to buy some panels that are cut to my measures in shops, but they are necessarily straight ones (I guess I could cope with the rounded back using a jigsaw )
Do you think the design would be compromised making it "straight" (see picture)
I intend to use a CHP70 pair that are in BR right now.
Best regards,
Eric
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Old 12th April 2011, 08:39 PM   #2
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Original design is here
In fact there is no difference in the back curved part beetwwen 85.2 deg and 90.0 deg (the latter the right one) : the only difference is in the front half, tilted or not .

Last edited by mahleriana; 12th April 2011 at 08:43 PM.
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Old 12th April 2011, 08:44 PM   #3
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by mahleriana View Post
I really do like the look of the 0v8 frugel horn mk3, but I guess it is not so easy to build if you don't have your own cutting tools = there are angles EVERYWHERE...
For my part, I am used to buy some panels that are cut to my measures in shops, but they are necessarily straight ones (I guess I could cope with the rounded back using a jigsaw )
Do you think the design would be compromised making it "straight" (see picture)
I intend to use a CHP70 pair that are in BR right now.
Best regards,
Eric
Well, provided you're really only "pivoting" the angle of front panel and stretching the base to maintain the same taper geometry and dimensions defined by internal panels, the CSA of choke point ( i.e. 38mm, ) and radius of curved back panel, you'd probably be fine - but that should be confirmed by Scott. I think you would however diminish the striking aesthetics of the 5dg slanted front baffle. The cabinet is so much more elegant and slim looking than the much more complicated FH-I
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Last edited by chrisb; 12th April 2011 at 08:46 PM.
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Old 12th April 2011, 09:16 PM   #4
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Quote:
Originally Posted by chrisb View Post
The cabinet is so much more elegant and slim looking than the much more complicated FH-I
I do agree, I tried the FH-I with very deceiving results, various TQWT were definitively better.
Again the 5 degree FH3 Scott did design (and some pictures from different posters I saw) is really elegant indeed. But it will be so much easier to do it straight...
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Old 13th April 2011, 01:19 AM   #5
Davejs is offline Davejs  United States
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Ok here is a trick that I learned years ago on wood working when you lack tools.
Small cabinet shops that are not busy can cut whatever you need if you suppy the wood cheap. You are only paying for their labor and if they are a small shop can do it for next to nothing. If you are really confused on angles and dimensions they can do it faster then you can calculate it. Some shops are great to deal with some are not so stop by in person and you will be suprised at what you find.
P.S. Pay cash and pick up on a Friday 30 minutes before they close leave a beverage if you can for the folks.
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Old 13th April 2011, 03:13 AM   #6
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Saw the title and thot of the Duck...

dave
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Old 13th April 2011, 06:35 AM   #7
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Sure it is a design any understanding wife will want to have in her living room ! Should be painted in color
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Old 13th April 2011, 07:57 AM   #8
Squeak is offline Squeak  Denmark
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If you are ready, and have the possibility of tucking the speaker into a corner, you can probably quit the flares too, and get much the same effect.
I'd probably also lengthen the cab a bit to get the driver up to decent ear hight, if it isn't tilted back. You could probably compensate for volume and gain better stability by making a sand-filled cavity/45 degree reflector at the bottom.
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Old 13th April 2011, 10:09 PM   #9
jemraid is offline jemraid  United Kingdom
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Hi all,

Quote:
Originally Posted by mahleriana View Post
Original design is
here
I made my pair to the above, I got the MDF cut into lengths at B&Q [UK DIY shed] and used a hand saw, an old power jigsaw and an old Record hand plane for the angles.

Take it slowly fit the next part into a previous one, work on both at once and you'll soon be finished.

They are the most graceful speakers and with the MA CHP-70's the most graceful sound I've ever heard.

I live not far from M1 Ju29 anyone is welcome to have a listen for themselves.

Warmest wishes - Jim
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Old 13th April 2011, 10:31 PM   #10
doorman is offline doorman  Canada
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Well done, Jim!
The whole DIY speaker community owes a lot to it's developer(s)!!
Best, Don
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