Horn Enclosure for Fostex 206

Puffin · 30th November 2006, 02:13 PM

I asked a question earlier today to which I have had no response. Perhaps I asked the wrong question !

Can anyone confirm that the Fostex designed horn enclosure for tthe 208 driver works better with the 206 than the specified Fostex horn designed for the 206.

Scottmoose · 30th November 2006, 04:23 PM

Slow down there! Give us a chance! You'll generally find on this forum that people only speak when they have something constructive to say (like the answer to a question for example)...

I can confirm the 208ESigma cabinet is fundamentally a better design than the 206 box which needs considerable tweaking to provide a similar response, and provides somewhat less gain in the LF. Use birch ply over MDF if you can afford it -less energy storage, stiffer, looks better.

Kofi Annan · 1st December 2006, 12:22 AM

I have the 206E in the 208EZ enclosure and I like them quite a bit.

Kofi

ronc · 1st December 2006, 12:42 AM

The major reason i worked to design the Dallas2 was the fact that all the sims on my development software i ran on posted designs (at that time) appeared to rely on majorly TL physical principals and not on a blend of the TL/horn action and not take into a factor a distortion of wavefronts over a frequency range. Most tend to just look at the lowest frequency that can be achieved in a BLH (FC). However distortion of the wave at frequencies above FC has to be delt with.
I dont know the 208 fostex design and have never run sims . As i delve deeper into the physics of horns i keep seeing the same principals, that being more of a blend of the actions rather than a reliance on one principal over the other. A TL action is a totally seperate physical action vrs a horn action. If you dont blend the actions then there is a reliance on one action over the other. Nothing aganist TL actions, but without the horn action you achieve a very lumpy and less dynamic sound in the higher frequencies.
The Dallas operation system was an early effort at combining the actions, the Austin principals are more advanced due to refinment of the physical actions.

ron

Puffin · 1st December 2006, 07:38 AM

Thanks Guys. Yes, I am itching to get something better up and running than the cobbled together BR box. Although I was lucky, the donor cabinet was 45 litres, the same as suggested in the Fostex site.

klykx · 1st December 2006, 10:23 AM

Scottmoose,

If choosing between the 208 E Sigma and 206-esr cabinet, which would you suggest as the best option for the fe206?

Puffin · 1st December 2006, 11:18 AM

Scottmoose (you must be very popular!)
I have joined the World Designs Forum and seen the excellent site of Simon's where he gives a blow by blow account of building the 208 cabinet. I think that is the one I will go for. Time to get my mate cutting the BBP.

steenoe · 1st December 2006, 11:53 AM

Quote:

I have joined the World Designs Forum and seen the excellent site of Simon's where he gives a blow by blow account of building the 208 cabinet.

Puffin, can you point us to the website?

Steen

secanbj · 1st December 2006, 12:03 PM

i am not Puffin but i can give you the url

http://www.world-designs.co.uk/forum/index.php

hm · 1st December 2006, 12:38 PM

The best fullrange Bl is the SAXOPHON,
because it fills the driver below 800 Hz,
this never possible with normal bass horns.

http://www.hm-moreart.de/102.htm

30th November 2006, 02:13 PM	#1
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Horn Enclosure for Fostex 206 I asked a question earlier today to which I have had no response. Perhaps I asked the wrong question ! Can anyone confirm that the Fostex designed horn enclosure for tthe 208 driver works better with the 206 than the specified Fostex horn designed for the 206.

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30th November 2006, 04:23 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Slow down there! Give us a chance! You'll generally find on this forum that people only speak when they have something constructive to say (like the answer to a question for example)... I can confirm the 208ESigma cabinet is fundamentally a better design than the 206 box which needs considerable tweaking to provide a similar response, and provides somewhat less gain in the LF. Use birch ply over MDF if you can afford it -less energy storage, stiffer, looks better.

1st December 2006, 12:22 AM	#3
Kofi Annan diyAudio Member Join Date: Jan 2004 Location: US	I have the 206E in the 208EZ enclosure and I like them quite a bit. Kofi

1st December 2006, 12:42 AM	#4
ronc diyAudio Member Join Date: Mar 2003	The major reason i worked to design the Dallas2 was the fact that all the sims on my development software i ran on posted designs (at that time) appeared to rely on majorly TL physical principals and not on a blend of the TL/horn action and not take into a factor a distortion of wavefronts over a frequency range. Most tend to just look at the lowest frequency that can be achieved in a BLH (FC). However distortion of the wave at frequencies above FC has to be delt with. I dont know the 208 fostex design and have never run sims . As i delve deeper into the physics of horns i keep seeing the same principals, that being more of a blend of the actions rather than a reliance on one principal over the other. A TL action is a totally seperate physical action vrs a horn action. If you dont blend the actions then there is a reliance on one action over the other. Nothing aganist TL actions, but without the horn action you achieve a very lumpy and less dynamic sound in the higher frequencies. The Dallas operation system was an early effort at combining the actions, the Austin principals are more advanced due to refinment of the physical actions. ron

1st December 2006, 07:38 AM	#5
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Thanks Guys. Yes, I am itching to get something better up and running than the cobbled together BR box. Although I was lucky, the donor cabinet was 45 litres, the same as suggested in the Fostex site.

1st December 2006, 10:23 AM	#6
klykx diyAudio Member Join Date: May 2006	Scottmoose, If choosing between the 208 E Sigma and 206-esr cabinet, which would you suggest as the best option for the fe206?

1st December 2006, 11:18 AM	#7
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Scottmoose (you must be very popular!) I have joined the World Designs Forum and seen the excellent site of Simon's where he gives a blow by blow account of building the 208 cabinet. I think that is the one I will go for. Time to get my mate cutting the BBP.

1st December 2006, 12:03 PM	#9
secanbj diyAudio Member Join Date: Sep 2003 Location: Gothenburg	i am not Puffin but i can give you the url http://www.world-designs.co.uk/forum/index.php

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