Wow Eric, that's fast! Thanks. Ga daar eens voor naar een ontwerpbureau 😉.
I have a sheet of 153x153 BB and some leftovers from previous projects. I intend to brace the hell out of it, but use 12mm panels to keep it as light as possible.
I see you've flattened the output very nicely. Is that because of the higher Le (3,80 instead of 1,90)?
I have a sheet of 153x153 BB and some leftovers from previous projects. I intend to brace the hell out of it, but use 12mm panels to keep it as light as possible.
I see you've flattened the output very nicely. Is that because of the higher Le (3,80 instead of 1,90)?
Just to be correct, isn't S5 (151,4-13,01-72,55)X50 = 3292, instead of 4000?
It doesn't alter the response much, so it's not that important.
It doesn't alter the response much, so it's not that important.
ive took the averige of the red marked piece
le rizes as frequentie drops so doubling it wil give a more realistic picture.
le rizes as frequentie drops so doubling it wil give a more realistic picture.
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So a larger horn mouth = larger S5 = shorter horn path? For example, a 10cm decrease of of the 72-cm panel is simmed with HR by the following:
- enlarging S5 by 10x50=500,
- lengthening the second Con (L45) from 27 to 37,
- shortening the first Con (L34) from 185 to 175.
Correct?
Ah, didn't know that about Le. I already wondered why Le is spec'd at 1 kHz...
- enlarging S5 by 10x50=500,
- lengthening the second Con (L45) from 27 to 37,
- shortening the first Con (L34) from 185 to 175.
Correct?
Ah, didn't know that about Le. I already wondered why Le is spec'd at 1 kHz...
almost correct .
in this case the driver is perpendicular on the hornpath. so L4-5 stays aprox 27
L3-4 is shortened by 10 cm
you could make the front closed ,and cut out the mouth,leaving 3cm over on the sides to stiffen top and bottem pannel.
in this case the driver is perpendicular on the hornpath. so L4-5 stays aprox 27
L3-4 is shortened by 10 cm
you could make the front closed ,and cut out the mouth,leaving 3cm over on the sides to stiffen top and bottem pannel.
L45 doesn't change. I knew that😀. Ok, 2nd try:A larger horn mouth = larger S5 = shorter horn path? For example, a 10cm decrease of the 72-cm panel is simmed with HR by the following:
- enlarging S5 by 10x50=500,
- shortening the first Con (L34) from 185 to 175.
Regarding the front, I was actually thinking in the opposite direction: make the front detachable/adjustable. That way I could use the horn for pack space, for example shoehorn in a pair of synergy horns 🙂.
you got it, in case of S5 being 4000 lenght is 185,and if S5 is 3300 lengt is ~197,S5=4500 lenght is 175(in reality acoustic path could differ a bit,compared to the sim)
A larger horn mouth = larger S5 = shorter horn path? For example, a 10cm decrease of the 72-cm panel is simmed with HR by the following:
- enlarging S5 by 10x50=500,
- shortening the first Con (L34) from 185 to 175..
looking forward to see your bild.🙂
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I totally forgot 
. What about the baffle cutout for the speaker? Should that just be a round hole as big as SD?
First sawdust has been made
.
. What about the baffle cutout for the speaker? Should that just be a round hole as big as SD?First sawdust has been made
.Thanks.
So it's not like with many FLH's, where there's a compression chamber in front of the speaker. I wasn't sure about that 😱.
So it's not like with many FLH's, where there's a compression chamber in front of the speaker. I wasn't sure about that 😱.
Some pics...
Top side:
Outdoor work space:
Speaker baffle with T-nuts glued & sealed. Also visible are dados for easy installing of the braces.
Top side:
Outdoor work space:
Speaker baffle with T-nuts glued & sealed. Also visible are dados for easy installing of the braces.
I hope it's sufficient. I used 12 mm(1/2") BB ply everywhere, except for the top (which is on the bottom during construction), which is 18 mm (3/4") underlayment (pine). Max span between braces is ~16 cm (1/2 ft).
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