Compound horn for FE166ES-R FULL PLANS

[brsanko]

Another member asked me to draw up plans for the Fostex FE166ES-R drivers that he has and I figured I may as well share them. I'm not completely finnised with them but I thought I'd share what I have so far.

[brsanko]

This picture shows how to cut them out of 2 1/2 5'x5' sheets.

[brsanko]

And here are the hornresp results for this design.

[brsanko]

as soon as I get some time I'm gonna figure out all the angles on all the cuts.

[hm]

Hello,

a very big satellite, you will need a lot of bass below 70 Hz.

Tell us how it sounds, if ready.

[rjbond3rd]

Very beautiful! Thank you for posting this intriguing and eye-catching design.

[brsanko]

They will probably sound best with a sub, but there is more than enough excursion left down to 50hz that a little EQ or Bass knob will do wonders for the bass.

[paba]

Very interesting,

there are several people here that have this driver and unfortunately very few cabinet options specifically designed for it... super large magnet and TS parameters. I like that this one the horn opens in the front.

please do post here any updates.
thank you
Paba

[hm]

Hello,

is the front horn throat smaller than the membran area?

if so the bass "never" reach the mids above 200 Hz,
aren´t you afraid of strong colourations by such a small
throat, and light weight membran?

may be high SPL, but the sound?

I made this 1985, and was not satisfied.

[brsanko]

The effect your talking about is from cancelations between the front and rear horns. Because your front horn is so big it's response goes much lower and cancels out the upper bass from the rear horn, because they are out of phase. I remodeled this several times to minimize that effect. You can still see a dip where the two horns "crossover" but it is not severe and ends up being less pronounced in reality than it is in simulation. Careful design is necessary to avoid this effect but it can be minimized and I believe I have done that in this design.