First of all, I am sending you the response of the enclosure without absorbing material. The placement, density can cause many problems therefore it is better for us to work on an undamped system.
As for the dimensions, the depth of the rear chamber is 280 mm, the height is 546 mm, the width is 250 mm. I am not quite clear with the areas. Rear chamber is located between the speaker and the horn throat. On one side there is the speaker and its' cross-sectional area (206 cm^2), on the other hand there is the throat (80 cm^2).
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Thanks Scott, very interesting results. The SPL plot looks just like the Replikon horn discussed a few weeks ago. Also, I have to admit that the displacement curve and impedance plot are a lot smoother then I expected.
No problem Martin. And likewise -I too was quite surprised that it was so smooth (well, relatively!). As I say, I don't pretend this is a definitive model, but I reckon it won't be too far off either. Interesting.
Best
Scott
Best
Scott
Impedance graph
Although it doesn't seem much, the difference between the impedance curves made me curious and wondered about the cause. The impedance curve that you have sent matches exactly with the one in the attached graph. But the difference between two simulations is, I have taken the horn lenght as 0.5 meters rather then 1 meter.
Although it doesn't seem much, the difference between the impedance curves made me curious and wondered about the cause. The impedance curve that you have sent matches exactly with the one in the attached graph. But the difference between two simulations is, I have taken the horn lenght as 0.5 meters rather then 1 meter.
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Deliberate choice on my part for the MathCad model. I forgot to mention that; my apologies. I did run the sim with a 0.5m length out of interest and noticed the variation; the frequency response didn't shift a great deal however, so I stuck with the 1m total for the graphs I posted.
Cheers
Scott
Cheers
Scott
I have uploaded the dimensions !
I have uploaded the dimensions of the Horn Enclosure to my web page.
They can be found under Fostex FE 206E link.
www.yildiz.edu.tr/~ilkorur
/Onur
I have uploaded the dimensions of the Horn Enclosure to my web page.
They can be found under Fostex FE 206E link.
www.yildiz.edu.tr/~ilkorur
/Onur
Hi, this is my first post here!
Could someone please explain part of the Fostex recommended BLH to me? I'm looking at pieces 2,6,9 and 11 - they seem to be simple flat pieces, but looking at the side view photograph of the enclosure, they don't seem to be simply fastened to the inside of the wall. Instead they look as though they sit out a little from the wall. Perhaps I am missing something in the plans, but I'd appreciate if someone could clarify this for me.
Thanks
Could someone please explain part of the Fostex recommended BLH to me? I'm looking at pieces 2,6,9 and 11 - they seem to be simple flat pieces, but looking at the side view photograph of the enclosure, they don't seem to be simply fastened to the inside of the wall. Instead they look as though they sit out a little from the wall. Perhaps I am missing something in the plans, but I'd appreciate if someone could clarify this for me.
Thanks
pdf is available
You can now download the drawings of the BLH (low-waf) enclosure in pdf format. By the end of this week I am planning to publish my simulation results between the recomended Fostex enclosure and Singular (without any stuffing). Also I am planning to add the BLH result among with these two. I am sure you are going to find those interesting.
Martin has asked a very nice question. I am planning to simulate that condition also. This BLH enclosure is designed to be rised from the floor level to make the speaker center at the middle height of the listening room. As he reminded, the horn mouths will have different loads when this enclosure is used as a floor-stander. I hope my simulation results are detailed enough to show us any difference. We will see.
/Onur
You can now download the drawings of the BLH (low-waf) enclosure in pdf format. By the end of this week I am planning to publish my simulation results between the recomended Fostex enclosure and Singular (without any stuffing). Also I am planning to add the BLH result among with these two. I am sure you are going to find those interesting.
Martin has asked a very nice question. I am planning to simulate that condition also. This BLH enclosure is designed to be rised from the floor level to make the speaker center at the middle height of the listening room. As he reminded, the horn mouths will have different loads when this enclosure is used as a floor-stander. I hope my simulation results are detailed enough to show us any difference. We will see.
/Onur
um... that was a dumb question. 
but, i have another question regarding your dimensions:
the 4 pieces that make up the top and bottom of the compression chamber are unmarked in your pdf file. can you provide the length and angle measurements for these pieces?
many thanks!!!
😀
but, i have another question regarding your dimensions:
the 4 pieces that make up the top and bottom of the compression chamber are unmarked in your pdf file. can you provide the length and angle measurements for these pieces?
many thanks!!!
😀
Missing Dimensions!
Lazy Me!
I was clearly notified about the absent dimensions by one of my friends but I am way too busy with the Ph.D. thesis these days and I forgot. Below, you can find the two pieces with their dimensions. They are indentical with the other two, top or bottom, doesn't matter.
I had the impression all of a sudden that you are in fact tying to build the design? 🙂
/Onur
Lazy Me!
I was clearly notified about the absent dimensions by one of my friends but I am way too busy with the Ph.D. thesis these days and I forgot. Below, you can find the two pieces with their dimensions. They are indentical with the other two, top or bottom, doesn't matter.
I had the impression all of a sudden that you are in fact tying to build the design? 🙂
/Onur
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