Backloaded Horn for Fostex FE 83

[becki200]

Hi im a newbie here and first of all i love this forum. Im building backloaded horns and im still looking for a small blh enclosure for the Fostex FE 83. Does anyone have an idea? I heard that there is a Nagaoka enclosure for this driver, but couldnt find a plan for it. So if you can help me, please answer. Thx a lot and best regards Thorsten

[chrisb]

Originally posted by becki200
Hi im a newbie here and first of all i love this forum. Im building backloaded horns and im still looking for a small blh enclosure for the Fostex FE 83. Does anyone have an idea? I heard that there is a Nagaoka enclosure for this driver, but couldnt find a plan for it. So if you can help me, please answer. Thx a lot and best regards Thorsten

look at the original Buschhorn MkI enclosure - I think it's about as small a "BLH" as you're likely to find that actually works.

http://www.speaker-online.de/bauen/bhorn.htm

If you can't read the original German text, the diagram and parts list should be sufficient to build from.

This design/folding topology is relatively easy to modify for a 4" driver (i.e. FE126/FE108EZ/FF125K - works best with the 126)

Note that optimum performance of this type of design is predicated on using room corners to complete the final section of horn mouth - they will still work without, but be severely limited in the lowest octaves.

[cervelorider]

The Nagaoka Tetsuo F-81 design uses the Fostex 83E. The plans are available in Book #5 of Tetsuo's designs. Book #5 is out of print now though, so it might be hard to find.

[giantstairs]

I think you can find it here:
http://homepage3.nifty.com/spida/eng-page9-1-3.htm

I think Clark at Blumenstein Audio sells something like this:
http://www.blumenstein-ultra-fi.com/naga.html

Good luck and let us now which you decide.

[becki200]

Thanks for your answers. The Buschhorn is well known here in Germany. Works very good with Tangband or Visaton. I ve found a small horn of 40 x 25 x 14 cm on ebay germany. This guy sells em for a lot of money. Ill upload a pic later, maybe someone knows this enclosure

[hm]

Hello,

because of the little Xmax of the driver,
better take a double horn i prefer my
TROMBONE

[becki200]

Does anybody know this? I d need a plan for it

[blumenco]

Originally posted by giantstairs
I think you can find it here:
http://homepage3.nifty.com/spida/eng-page9-1-3.htm

I think Clark at Blumenstein Audio sells something like this:
http://www.blumenstein-ultra-fi.com/naga.html

Good luck and let us now which you decide.

Yes, the F-81 was the starting point for the Naga design, which is now pretty heavily evolved. It is definitely viable in stock "F-81" form though.

I personally love the small Fostex drivers. harder to please than you think though... they are very resolute, especially in the upper frequencies. gotta feed 'em right.

I am having some modded by Dave Dlugos now, actually to offer as an option in the Naga horn... should take things to the next level.

-Clark

[becki200]

Thank you all, but i still havent found what i am looking for. The small horn (sse pic) is much smaller. It is just 40 cm high, width is 13,2 cm, depth around 25 cm.

[Scottmoose]

I assume you mean this.

Can't guarantee how good it is though.