B'horn Super Tweet?

[Jhovis]

Has anyone ever added a super tweeter to a B'horn using an FE103? I know the Fostex super tweets are probably too expensive to use with the inexpensive FE103. However, I think there is probably something else that is less. Just curious.

[GrahamnDodder]

Regardless of how they spec out, I have to say that I have never found the 103's wanting for decent high end.

The idea, of course, is to create bass with the enclosure. While they do sound a tad peaky in the mids, running a notch filter of .82mH(low DCR)/10ohm/4.7uF knocks that out pretty well.

If you think in relative terms, the filter has the net effect of lifting both the bass and the highs.

Dave (planet) has listened to the 103's, too. I would be curious as to his opinion of the highs.

GnD

[Jhovis]

Thanks! I'm already tweaking and I haven't even finished the cabinets. BTW, I ordered a .82mH, 10ohm and 4.7uF That was from this site: http://hometown.aol.de/hphinder/homepage/

[GrahamnDodder]

Well, there ya go.

We'll compare pix and listening tests when we are done.

Just be aware that it'll take the 103's a while to break in. Lest you lose faith, here's a big ol' buttload of links for you to peruse from the Japanese Cults-of-Fostex (mostly 103's)

A trip through Japan, home of the FE103E

Enjoy while you build.

GnD

[planet10]

Originally posted by GrahamnDodder
Dave (planet) has listened to the 103's, too. I would be curious as to his opinion of the highs.

Well i've heard the RS40-1197 version of the FE103 & the FE103A (35-40 year old alnico ancestor of the current FE103) and the FE108sigma. The 1197 definitly needs help above about 10k. Without phase plugs the FE103A sometimes does, sometimes doesn't depending on source. With phase plugs, an ST would be Xoed at 15-20k. I'd like to here the 108 with phase plugs... they go up but the PP helps dispersion.

I've found that you can get away with quite a modest tweeter. There are some vintage alnico Foster horns that work well, an Isophon 2" cone, even the little 2" thimble tweeters (especially with phase plug) -- in the last case a decent cap is going to be more expensive than the tweeters.

And new -- this little horn (on the order of $10), worked well -- it sat on top of Chris' B'Horns until he got the phase plugs. (there is a thread herein about aluminum miniRSs that has a reference to a current supplier of similar)

dave